Middle Power Class-D Speaker Amplifiers Class-D Speaker Amplifier for Digital Input BD5446EFV No.11075ECT14 Description BD5446EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-power consumption, delivers an output power of 20W+20W. This IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD) process technology that eliminates turn-on resistance in the output power stage and internal loss due to line resistances up to an ultimate level. With this technology, the IC can achieve high efficiency of 87% (10W+10W output with 8 load). In addition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power consumption and low heat generation and eliminates necessity of external heat-sink up to a total output power of 40W. This product satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system. Features 1) BD5446EFV has two system of digital audio interface. 2 (I S/LJ format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs (fixed), SYS_CLK: 256fs (fixed)) 2) Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10~26V) 3) It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat. 4) S/N of the system can be optimized by adjusting the gain setting among 8 steps. (20~34dB / 2dB step) 5) It has the output power limitation function that can be adjusted to an arbitrary output power. 6) The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback circuitry of the output. In addition, a low noise and low distortion are achieved. 7) It provides with the best stereo DAC output for the headphone usage. As a result, the output of the selection of the digital input in two systems is possible. 8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off. High quality muting performance is realized by using the soft-muting technology. 9) BD5446EFV is a highly reliable design to which it has various protection functions. (High temperature protection, Under voltage protection, Output short protection, Output DC voltage protection and Clock stop protection) Applications Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc., www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 1/31 2011.06 - Rev.C Technical Note BD5446EFV Absolute maximum ratings (Ta=25) Parameter Supply voltage Symbol VCC Ratings Unit Conditions 30 V Pin 25, 28, 29, 53, 54 2.0 W *3 *4 *1 *2 Power dissipation Pd 4.5 W 6.2 W *5 Input voltage VIN -0.3 ~ 4.5 V Pin 7 ~ 18, 21 *1 Pin24 *1 Open-drain terminal voltage VERR -0.3 ~ 30 V Operating temperature range Topr -25 ~ +85 Storage temperature range Tstg -55 ~ +150 Maximum junction temperature Tjmax +150 *1 The voltage that can be applied reference to GND (Pin 6, 36, 37, 45, 46). *2 Do not, however exceed Pd and Tjmax=150. *3 70mmx70mmx1.6mm, FR4, 1-layer glass epoxy board (Copper on bottom layer 0%) Derating in done at 16mW/ for operating above Ta25. *4 70mmx70mmx1.6mm, FR4, 2-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 36mW/ for operating above Ta25. There are thermal via on the board. *5 70mmx70mmx1.6mm, FR4, 4-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 49.6mW/ for operating above Ta25. There are thermal via on the board. Operating conditions (Ta=25) Parameter Symbol Ratings Unit VCC 10 ~ 26 V Pin 25, 28, 29, 53, 54 Minimum load impedance (Speaker Output) RL_SP 5.4 *6 Minimum load impedance (DAC Output) RL_DA 20 k Pin 22, 23 Supply voltage Conditions *1 *2 *6 Do not, however exceed Pd. * No radiation-proof design. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 2/31 2011.06 - Rev.C Technical Note BD5446EFV Electrical characteristics (Unless otherwise specified Ta=25,Vcc=13V,f=1kHz,RL_SP=8,RL_DA=20k,RESETX=3.3V,MUTEX=3.3V,PDX=3.3V, Gain=20dB,fs=48kHz) Limits Item Symbol Unit Conditions Min Typ Max Total circuit Circuit current Pin 25, 28, 29, 53, 54 No load Pin 25, 28, 29, 53, 54,No load RESETX=0V,MUTEX=0V,PDX=0V ICC1 - 45 90 mA ICC2 - 1.5 3 mA VERR - - 0.8 V Pin 24,IO=0.5mA Regulator output voltage 1 VREG_G 5.0 5.5 6.0 V Pin 1, 27 Regulator output voltage 2 VREG_3 3.0 3.3 3.6 V Pin 5 High level input voltage VIH 2.5 - 3.3 V Pin 7 ~ 18, 21 Low level input voltage VIL 0 - 0.8 V Pin 7 ~ 18, 21 IIH 33 66 132 A Pin 7 ~ 18, 21,VIN = 3.3V PO1 - 10 - W PO2 - 20 - W THDSP - 0.07 - % PO=1W, BW=20~20kHz *7 CTSP 65 80 - dB PO=1W, BW=IHF-A *7 VNO_SP - 140 280 Vrms -dBFS, BW=IHF-A *7 VNOR_SP - 5 10 Vrms MUTEX=0V,-dBFS, BW=IHF-A *7 fPWM1 - 512 - KHz fs=32kHz *7 fPWM2 - 705.6 - KHz fs=44.1kHz *7 fPWM3 - 768 - KHz fs=48kHz *7 VOMAX 0.85 1.0 - Vrms 0dBFS,THD+n=1% CB -1 0 1 dB 0dBFS THDDA - 0.05 0.5 % -20dBFS,BW=20~20kHz CTDA 65 80 - dB 0dBFS,BW=IHF-A Output noise voltage VNO_DA - 10 20 Vrms -dBFS, BW=IHF-A Residual noise voltage VNOR_DA - 3 10 Vrms Circuit current (Power down mode) Open-drain terminal Low level voltage Input current (Input pull-down terminal) Speaker Output Maximum momentary output power 1 Maximum momentary output power 2 Total harmonic distortion Crosstalk Output noise voltage (Sampling mode) Residual noise voltage (Mute mode) PWM sampling frequency THD+n=10% GAIN=26dB VCC=18V, THD+n=10% GAIN =26dB *7 *7 DAC Output Maximum output voltage Channel Balance Total harmonic distortion Crosstalk MUTEX=0V,PDX=0V, -dBFS, BW=IHF-A *7 These items show the typical performance of device and depend on board layout, parts, and power supply. The standard value is in mounting device and parts on surface of ROHM's board directly. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 3/31 2011.06 - Rev.C Technical Note BD5446EFV Electrical characteristic curves(VCC=13V,Ta=25,RL_SP=8,RL_DA=20k,Gain=20dB,fin=1kHz,fs=48kHz) Measured by ROHM designed 4 layer board. 80 Sampling 60 50 40 Mute 30 20 10 0 3 THD=10% THD=1% 0 Fig.1 VOLTAGE GAIN(dB) EFFICIENCY(%) 80 70 60 50 40 30 20 10 0 8 10 30 28 26 24 22 20 18 16 14 12 10 20 25 30 Without signal BW=2020KHz -20 -40 -60 -80 -100 -140 100 1k 10k 100k 10 100 1k 10k FREQUENCY(Hz) FREQUENCY(Hz) Fig.4 Fig.5 Fig.6 Efficiency - Output power Voltage gain - Frequency Po=1W BW=2020KHz 6KHz 1KHz 0.1 0.001 0.01 0.1 1 1 0.1 100Hz 0.01 CROSSTALK(dB) THD+N(%) 10 10 0.01 100 10 100 1k 10k 100k FREQUENCY(Hz) OUTPUT POWER(W) 100k FFT of Output noise voltage 100 BW=2020KHz 1 40 -120 10 10 35 0 12 100 THD+N(%) 15 Fig.3 Po=1W L=22H C=0.47F Cg=0.068F OUTPUT PO WER(W/ch) CROSSTALK(dB) 10 Current consumption - Output power Output power - Power supply voltage 100 90 6 5 TOTAL OUTPUT POWER(W) Fig.2 Current consumption - Power supply voltage 4 0 VCC(V) VCC(V) 2 VCC=18V 1 8 10 12 14 16 18 20 22 24 26 28 8 10 12 14 16 18 20 22 24 26 28 0 VCC=13V 2 NOISE FFT(dBV) ICC(mA) 70 44 40 36 32 28 24 20 16 12 8 4 0 ICC(A) OUTPUT POWER(W/ch) 100 90 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 BW=2020KHz 0.001 0.01 0.1 1 10 OUTPUT POWER(W) Fig.7 Fig.8 Fig.9 THD+N - Output power THD+N - Frequency Crosstalk - Output power 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 fin=300Hz Po=3.3W Po=1W BW=2020KHz Speaker output fin=300Hz Po=3.3W Speaker output 5V/div 5V/div MUTEX 2V/div MUTEX 2V/div 10ms/div 10ms/div 10 100 1k 10k 100k FREQUENCY(Hz) Fig.10 Crosstalk -Frequency www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. Fig.11 Wave form when Releasing Soft-mute 4/31 Fig.12 Wave form when Activating Soft-mute 2011.06 - Rev.C Technical Note BD5446EFV Electrical characteristic curves(VCC=18V,Ta=25,RL_SP=8,RL_DA=20k,Gain=20dB,fin=1kHz,fs=48kHz) Measured by ROHM designed 4layer board. 100 70 60 50 40 30 20 10 36 34 Po=1W L=22H C=0.47F Cg=0.068F 32 30 28 26 5 10 15 20 -80 -100 -140 10 100 OUTPUT POWER(W /ch) 1k 10k 10 100k 100 1k 10k 100k FREQUENCY(Hz) FREQUENCY(Hz) Fig.13 Fig.14 Fig.15 Efficiency - Output power Voltage gain - Frequency FFT of output noise voltage 100 100 Po=1W BW=2020KHz BW=2020KHz 1 6KHz 1KHz 0.1 CROSSTALK(dB) 10 THD+N(%) 10 THD+N(%) -60 20 0 1 0.1 100Hz 0.01 0.01 0.001 0.01 0.1 1 10 100 OUTPUT POWER(W) 0 -10 -20 -30 -40 -50 -60 -70 -80 10 100 1k 10k 100k FREQUENCY(Hz) Fig.16 THD+N - Output power CROSSTALK(dB) -40 -120 24 22 0 Without signal BW=2020KHz -20 NOISE FFT(dBV) VOLTAGE GAIN(dB) 80 EFFICIENCY(%) 0 40 38 90 Fig.17 THD+N - Frequency 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 BW=2020KHz 0.001 0.01 0.1 1 10 100 OUTPUT POWER(W) Fig.18 Crosstalk - Output power Po=1W BW=2020KHz -90 -100 10 100 1k 10k 100k FREQUENCY(Hz) Fig.19 Crosstalk - Frequency www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 5/31 2011.06 - Rev.C Technical Note BD5446EFV Pin configuration and Block diagram VCCP1 1 REG_G1 54 2 FILP 53 3 Power Limiter NC 52 4 FILA 51 5 REG_3 50 REG_G1 GNDA 6 49 Driver 1P 7 NC 48 NC 47 8 9 I2S/LJ Interface 46 Driver 1N 10 45 GNDP1 11 44 12 43 Control Interface 13 14 15 REG_G1 I2S/LJ Selector 42 x8 Over Sampling Digital Filter PWM Modulator NC 40 REG_G2 39 16 17 Gain Selector 38 Driver 2N 18 19 37 GNDP2 TEST 36 NC 35 20 21 41 DAC Selector Driver 2P NC 34 22 33 DAC REG_G2 23 32 24 31 25 26 VCCA NC 27 High Temperature Protection Under Voltage Protection Clock Stop Protection 29 Output Short Protection Output DC Voltage Protection VCCP2 REG_G2 www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. NC 30 6/31 28 2011.06 - Rev.C Technical Note BD5446EFV Pin function explanation (Provided pin voltages are typ. Values) No. Pin name Pin voltage Pin explanation Internal equivalence circuit 53,54 28,29 1 27 REG_G1 REG_G2 5.5V Internal power supply pin for ch1 Gate driver Internal power supply pin for ch2 Gate driver 1 27 550K Please connect the capacitor. 45,46 36,37 25 Bias pin for PWM signal 2 FILP 1.75V~2.55V 2 Please connect the capacitor. 6 25 3 PLMT 0V Power limiter setting terminal 3 400K 6 27 4 50K Bias pin for Analog signal FILA 4 2.5V Please connect the capacitor. 50K 6 25 Internal power supply pin for Digital circuit 5 REG3 5 3.3V Please connect the capacitor. 500K 6 6 GNDA 0V www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. GND pin for Analog signal 7/31 2011.06 - Rev.C Technical Note BD5446EFV No. Pin name 7 8 9 10 11 SYS_CLK BCLK LRCLK SDATA1 SDATA2 Pin voltage Pin explanation Internal equivalence circuit 5 0V Digital audio signal input pin 7,8,9 10,11 50K 6 12 RESETX 13 MUTEX 14 Reset pin for Digital circuit H: Reset OFF L: Reset ON 0V Speaker output mute control pin H: Mute OFF L: Mute ON Power down control pin H: Power down OFF L: Power down ON PDX 5 12,13,14 50K 6 5 Digital audio signal data format setting terminal 15 IIS_LJ 0V H: Left Justified format 2 L: I S format 15 50K 6 5 16 17 18 GAIN1 GAIN2 GAIN3 Gain setting terminal 0V 16,17,18 Gain=20dB~34dB, 2dB step 50K 6 5 19 20 TEST1 TEST2 Test pin 0V 19,20 Please connect to GND. 50K 6 5 DAC output selection terminal 21 SEL_DAC 0V H: SDATA2 is output from the DAC L: SDATA1 is output from the DAC 21 50K 6 www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 8/31 2011.06 - Rev.C Technical Note BD5446EFV No. Pin name Pin voltage Pin explanation Internal equivalence circuit 25 OUT_DAC2 OUT_DAC1 22,23 2.5V Please connect it with the latter part circuit through the capacitor. 50K 22 23 ch2 DAC output pin ch1 DAC output pin 6 25 Error flag pin 500 24 ERROR 3.3V Please connect pull-up resistor. H: While Normal L: While Error 24 6 25 VCCA VCC 26,30 34,35 41,47 48,52 N.C. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. Power supply pin for Analog signal Non connection pin 9/31 2011.06 - Rev.C Technical Note BD5446EFV No. Pin name Pin voltage 28,29 VCCP2 Vcc 31,32 OUT2P Vcc~0V Pin explanation Internal equivalence circuit Power supply pin for ch2 PWM signal 28,29 33 BSP2P 36,37 GNDP2 0V 38,39 OUT2N Vcc~0V Output pin of ch2 positive PWM Please connect to Output LPF. Boot-strap pin of ch2 positive Please connect the capacitor. 33 40 31,32 38,39 GND pin for ch2 PWM signal Output pin of ch2 negative PWM Please connect to Output LPF. 40 BSP2N Boot-strap pin of ch2 negative Please connect the capacitor. 42 BSP1N Boot-strap pin of ch1 negative Please connect the capacitor. 43,44 OUT1N Vcc~0V 36,37 53,54 45,46 GNDP1 0V GND pin for ch1 PWM signal Boot-strap pin of ch1 positive Please connect the capacitor. 49 BSP1P 50,51 OUT1P Vcc~0V 53,54 VCCP1 Output pin of ch1 negative PWM Please connect to Output LPF. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. Output pin of ch1 positive PWM Please connect to Output LPF. 42 49 43,44 50,51 45,46 Power supply pin for ch1 PWM signal 10/31 2011.06 - Rev.C Technical Note BD5446EFV GAIN1 pin, GAIN2 pin, GAIN3 pin function GAIN3 (18pin) GAIN2 (17pin) GAIN1 (16pin) Speaker output gain L L L 20dB L L H 22dB L H L 24dB L H H 26dB H L L 28dB H L H 30dB H H L 32dB H H H 34dB SEL_DAC pin function SEL_DAC (21pin) OUT_DAC1 (23pin) OUT_DAC2 (24pin) L The Lch signal of SDATA1 is output The Rch signal of SDATA1 is output H The Lch signal of SDATA2 is output The Rch signal of SDATA2 is output RESETX pin function RESETX (10pin) State of Digital block L Reset ON H Reset OFF RESETX pin RESETX (12pin) State of Digital block L Reset ON H Reset OFF PDX pin,MUTEX pin function PDX (12pin) MUTEX (11pin) Power Down DAC output (24,25pin) L L or H ON HiZ_Low H L H H OFF Normal operation PWM output (33,34,38,39,43,44,48pin) HiZ_Low Normal operation IIS_LJ pin function IIS_LJ (15pin) Digital data format L I2S H Left Justified www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 11/31 2011.06 - Rev.C Technical Note BD5446EFV Input digital audio signal sampling frequency (fs) explanation PWM sampling frequency, Soft-start, Soft-mute time, and the detection time of the DC voltage protection in the speaker depends on sampling frequency (fs) of the digital audio input. Sampling frequency of the digital audio input (fs) 32kHz PWM sampling frequency (fpwm) Soft-start / Soft-mute time DC voltage protection in the speaker detection time 512kHz 64msec. 64msec. 44.1kHz 705.6kHz 46msec. 46msec. 48kHz 768kHz 43msec. 43msec. For voltage gain (Gain setting) BD5446EFV prescribe voltage gain at speaker output (BTL output) under the definition 0dBV (1Vrms) as full scale input of the digital audio input signal. For example, digital audio input signal = Full scale input, Gain setting = 20dB, Load resistance 2 RL_SP = 8 will give speaker output (BTL output) amplitude as Vo=10Vrms. (Output power Po = Vo /RL_SP = 12.5W ) Speaker output and DAC output Digital audio input signal SDATA1 will be output to the speaker. (SDATA2 will not be output to the speaker. DAC output can be selected either from digital audio input signal SDATA1 or SDATA2.) Format of digital audio input SYS_CLK: It is System Clock input signal. It will input LRCLK, BCLK, SDATA1 (SDATA2) that synchronizes with this clock that are 256 times of sampling frequency (256fs). LRCLK: It is L/R clock input signal. It corresponds to 32kHz/44.1kHz/48kHz with those clock (fs) that are same to the sampling frequency (fs) . The data of a left channel and a right channel for one sample is input to this section. BCLK: It is Bit Clock input signal. It is used for the latch of data in every one bit by sampling frequency's 64 times sampling frequency (64fs). SDATA1 & SDATA2: It is Data input signal. It is amplitude data. The data length is different according to the resolution of the input digital audio data. It corresponds to 16/ 20/ 24 bit. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 12/31 2011.06 - Rev.C Technical Note BD5446EFV I2S data format 1/64fs LRCLK Lch Rch BCLK SDATA1 MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB (SDATA2) 32 clocks 32 clocks Fig.20 I2S Data Format 64fs, 24 bit Data Lch LRCLK Rch BCLK SDATA1 MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 MSB LSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB (SDATA2) Fig.21 I2S Data Format 64fs, 20 bit Data Lch LRCLK Rch BCLK SDATA1 MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 MSB LSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB (SDATA2) Fig.22 2 I S Data Format 64fs, 16 bit Data The Low section of LRCLK becomes Lch, the High section of LRCLK becomes Rch. After changing LRCLK, second bit becomes MSB. Left-justified format 1/64fs LRCLK Lch Rch BCLK SDATA1 (SDATA2) MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 32 clocks 7 6 5 4 3 2 1 32 clocks Fig.23 Left-Justified Data Format 64fs, 24 bit Data Lch LRCLK LSB Rch BCLK SDATA1 MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 MSB LSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB (SDATA2) Fig.24 Left-Justified Data Format 64fs, 20 bit Data Lch LRCLK Rch BCLK SDATA1 MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 MSB LSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB (SDATA2) Fig.25 Left-Justified Data Format 64fs, 16 bit Data The High section of LRCLK becomes Lch, the Low section of LRCLK becomes Rch. After changing LRCLK, first bit becomes MSB. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 13/31 2011.06 - Rev.C Technical Note BD5446EFV Audio Interface format and timing Recommended timing and operating conditions (MCLK, BCLK, LRCLK, SDATA) 1/ / SYS_CLK SYS_CLK 1/fLRCLK LRCLK 1/fBCLK BCLK Fig-26 Clock timing LRCLK tHD;LR tSU;LR BCLK tHD ; SD tSU ; SD SDATA Fig-27 Audio Interface timing (1) SYS_CLK tHD ; BC tSU ; BC BCLK Fig-28 Audio Interface timing (2) Parameter Symbol Limit Unit Min. Max. fSYS_CLK 8.192 12.288 MHz fLRCLK 32 48 kHz 1 SYS_CLK frequency 2 LRCLK frequency 3 BCLK frequency fBCLK 2.048 3.072 MHz 4 Setup time, LRCLK1 tSU;LR 20 ns 5 Hold time, LRCLK1 tHD;LR 20 ns 6 Setup time, SDATA tSU;SD 20 ns 7 Hold time, SDATA tHD;SD 20 ns 8 Setup time, BCLK2 tSU;BC 2.5 ns 9 Hold time, BCLK2 tHD;BC 3.5 1 This regulation is to keep rising edge of LRCK and rising edge of BCLK from overlapping. 2 This regulation is to keep rising edge of SYS_CLK and rising edge of BCLK from overlapping. ns www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 14/31 2011.06 - Rev.C Technical Note BD5446EFV Power supply start-up sequence VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) Power up VCCA, VCCP1, VCCP2 simultaneously. t REG_3 (5pin) REG_G1 (1pin) REG_G2 (27pin) REG_G1, REG_G2 REG_3 t RESETX (12pin) Set RESETX to High after power up. t SYS_CLK (7pin) BCLK (8pin) LRCLK (9pin) SDATA1 (10pin) SDATA2 (11pin) Degital audio data communication. t PDX (14pin) Set PDX to High. t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t MUTEX (13pin) Set MUTEX to High. t Soft-start 43msec(fs=48kHz) Speaker output t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 15/31 2011.06 - Rev.C Technical Note BD5446EFV Power supply shut-down sequence VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) Power down VCCA, VCCP1, VCCP2, simultaneously. t REG_3 (5pin) REG_G1 (1pin) REG_G2 (27pin) REG_G1, REG_G2 REG_3 t RESETX (12pin) Set RESETX to Low t SYS_CLK (7pin) BCLK (8pin) LRCLK (9pin) SDATA1 (10pin) SDATA2 (11pin) Stop digital audio date signal. t PDX (14pin) Set PDX to Low. t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t MUTEX (13pin) Set MUTEX to Low. t Soft-mute 43msec(fs=48kHz) t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 16/31 2011.06 - Rev.C Technical Note BD5446EFV About the protection function Protection function Detecting & Releasing condition Output short protection Detecting condition Detecting current = 10A (TYP.) DC voltage protection in the speaker Detecting condition PWM output Duty=0% or 100% 43msec(fs=48kHz) above fixed Detecting condition Chip temperature to be above 150 (TYP.) High temperature protection Under voltage protection DAC Output Normal operation Chip temperature to be below 120 (TYP.) Detecting condition Power supply voltage to be below 8V (TYP.) ERROR Output HiZ_Low (Latch) L (Latch) HiZ_Low (Latch) L (Latch) HiZ_Low Normal operation Releasing condition PWM Output H Normal operation HiZ_Low Normal operation H Releasing condition Normal operation Power supply voltage to be above 9V (TYP.) Detecting condition No change to SYS_CLK more than 1usec (TYP.) Irregular output HiZ_Low Releasing condition Normal input to SYS_CLK Normal operation Normal operation Clock stop protection H * The ERROR pin is Nch open-drain output. * Once an IC is latched, the circuit is not released automatically even after an abnormal status is removed. The following procedures or is available for recovery. After the MUTEX pin is made Low once, the MUTEX pin is returned to High again. Turning on the power supply again. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 17/31 2011.06 - Rev.C Technical Note BD5446EFV 1) High temperature protection This IC has the high temperature protection circuit that prevents thermal reckless driving under an abnormal state for the temperature of the chip to exceed Tjmax=150. Detecting condition - It will detect when MUTE pin is set High and the temperature of the chip becomes 150(TYP.) or more. The speaker output is muted through a soft-mute when detected. Releasing condition - It will release when MUTE pin is set High and the temperature of the chip becomes 120(TYP.) or less. The speaker output is outputted through a soft-start when released. Temperature of IC chip junction() 150 120 t OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Speaker output Soft-mute 43msec(fs=48KHz) Soft-start 43msec(fs=48KHz) t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 18/31 2011.06 - Rev.C Technical Note BD5446EFV 2) Under voltage protection This IC has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power supply voltage. Detecting condition - It will detect when MUTE pin is set High and the power supply voltage becomes lower than 8V. The speaker output is muted through a soft-mute when detected. Releasing condition - It will release when MUTE pin is set High and the power supply voltage becomes more than 9V. The speaker output is outputted through a soft-start when released. VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) 9V 8V t OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Speaker output Soft-mute 43msec(fs=48kHz) Soft-start 43msec(fs=48kHz) t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 19/31 2011.06 - Rev.C Technical Note BD5446EFV 3) Clock stop protection This IC has the clock stop protection circuit that make the speaker output mute when the SYS_CLK signal of the digital audio input stops. Detecting condition - It will detect when MUTE pin is set High and the SYS_CLK signal stops for about 1usec or more. The speaker output is muted through a soft-mute when detected. Releasing condition - It will release when MUTE pin is set High and the SYS_CLK signal returns to the normal clock operation. The speaker output is outputted through a soft-start when released. Clock stop Clock recover SYS_CLK (7pin) t Protection start with about 1sec clock stop. OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) HiZ-Low t Soft-start 43msec(fs=48kHz) Speaker output t ERROR (24pin) 3.3V t OUT_DAC1 (23pin) OUT_DAC2 (22pin) Unstable t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 20/31 2011.06 - Rev.C Technical Note BD5446EFV 4)Output short protection(Short to the power supply) This IC has the PWM output short protection circuit that stops the PWM output when the PWM output is short-circuited to the power supply due to abnormality. Detecting condition - It will detect when MUTE pin is set High and the current that flows in the PWM output pin becomes 10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch. Releasing method - After the MUTEX pin is set Low once, the MUTEX pin is set High again. Turning on the power supply again. Short to VCC Release from short to VCC OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM out IC latches with HiZ-Low. Released from latch state. Over current 10A(TYP.) t ERROR (24pin) t sec(TYP.) MUTEX13pin Latch release t 5) Output short protection(Short to GND) This IC has the PWM output short protection circuit that stops the PWM output when the PWM output is short-circuited to GND due to abnormality. Detecting condition - It will detect when MUTE pin is set High and the current that flows in the PWM output terminal becomes 10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch. Releasing method - After the MUTEX pin is set Low once, the MUTEX pin is set High again. Turning on the power supply again. Short to GND Release from short to GND OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM out IC latches with HiZ-Low. Released from latch state. Over current 10A(TYP.) t ERROR (24pin) t sec(TYP.) MUTEX(13pin) Latch release t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 21/31 2011.06 - Rev.C Technical Note BD5446EFV 6) DC voltage protection in the speaker When the DC voltage in the speaker is impressed due to abnormality, this IC has the protection circuit where the speaker is defended from destruction. Detecting condition - It will detect when MUTE pin is set High or Low and PWM output Duty=0% or 100% , 43msec(fs=48kHz) or above. Once detected, The PWM output instantaneously enters the state of HiZ-Low, and IC does the latch. Releasing method - After the MUTEX pin is set Low once, the MUTEX pin is set High again. Turning on the power supply again Abnormal state release. PWM out locked duty=100% abnormal state. OUT1P (50, 51pin) OUT1N (43, 44pin) OUT2P (31, 32pin) OUT2N (38, 39pin) t PWM output IC latche with HiZ-Low. Latch release state. Speaker output t Soft-start Protection start surge current into speaker output for 43msec (fs=48kHz) and over. 43msec(fs=48kHz) ERROR (24pin) t MUTEX(13pin) Latch release t www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 22/31 2011.06 - Rev.C Technical Note BD5446EFV Output power limiter function This IC is provided with an output power limiter function to protect speakers from destruction by an excessive output. Limiter values are freely specified by changing external resistors R1/R2 as shown in Fig-26. Fig-27 shows a speaker output waveform that is generated with use of the output limiter function. Because the waveform is soft-clipped, unusual noises on audible signals are significantly reduced under operation of limiter. Use resistors with a high degree of accuracy for R1 and R2 (1% or higher accuracy is recommended). The capacitor C is for the noise removal of output power limitation terminal (3pin). Provide grounding with a 1F capacitor. Specify a resistor of 10k or higher resistor R1 and R2. If the output power limiter function is not used, R1, R2 and C is unnecessary. However, connect 3pin with GNDA. Power Limiter REG_3 3 R1 R2 Speaker output 5 C 1F 5pin 3.3V Soft Clip 1F Fig-30 GNDA Fig-29 10 OUTPUT POWER(W/ch) . 9 8 7 6 5 4 3 VCC=13V, RL=8, f=1kHz Gain=20dB, 5pin=3.3V 2 1 0 1 1.2 1.4 1.6 1.8 2 3pin terminal voltage [V] Fig.31 Output power - 3pin terminal voltage www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 23/31 2011.06 - Rev.C Technical Note BD5446EFV Application Circuit Example(RL_SP=8) C1 3.3F GNDP1 VCCP1 1 C2 1F ) ) ( ) ( ( C4 1F C5 VCCP1 REG_G1 2 FILP 53 3 Power Limiter NC 52 4 FILA 51 5 REG_3 50 1F REG_G1 GNDA GNDA 6 Driver 1P 7 0 Digital Audio Source LRCLK (fs=32kHz48kHz) (NOP) 9 GNDP1 Control Interface I2S/LJ Selector x8 Over Sampling Digital Filter NC 40 Gain Selector OUT_DAC2 (Rch) GNDP2 Driver 2N 37 GNDP2 OUT_DAC1 (Lch) ERROR VCCA DAC Selector 100k 32 24 31 25 26 3.3F C27 REG_G2 VCCA NC High Temperature Protection Under Voltage Protection Clock Stop Protection 1F C28 220F C28D www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. R31B GNDP2 5.6 C31B 470pF 8 Rch (SDATA1) C31A 0.068F 1F C31 22H L31 29 VCCP2 REG_G2 0.33F C31C NC 30 Output Short Protection Output DC Voltage Protection 27 C38A 5.6 R38B 33 DAC 10F C25D GNDP2 NC 34 22 GNDA GNDA 36 23 3.3V R24 C25 0.1F Driver 2P 0.068F 470pF C38B NC 35 1FC23 L38 22H 38 20 21 1F C38 39 TEST 1F C22 0.068F 41 REG_G2 19 VSS Lch (SDATA1) 22H L43 42 PWM Modulator 18 VSS 8 C42 1F REG_G1 16 17 R43B GNDP1 5.6 C43B 470pF C43A 43 14 15 0.33F C43C 44 13 3.3V C50A C53D 5.6 220F R50B 45 12 PDX C53 1F GNDP1 11 MUTE 0.068F 470pF C50B 46 Driver 1N 10 RESET -con I2S/LJ Interface 0 SDATA2 C49 1F NC 47 0 SDATA1 NC 48 8 0 L50 22H 49 SYS_CLK (256fs) 0 BCLK (64fs) 54 28 VCCP2 24/31 2011.06 - Rev.C Technical Note BD5446EFV BOM list(RL_SP=8) Parts Parts No. Value Company Product No. Rated Voltage Tolerance Size IC U1 ROHM BD5446EFV 18.5mmx9.5mm TOKO 1168ER-0001 - (20%) 10.3mmx7.6mm SAGAMI DBE7210H-220M - (20%) 10.5mmx6.4mm ROHM MCR18PZHZFL5R60 1/4W F(1%) 3.2mmx1.6mm Inductor Resistor Capacitor L31, L38, L43, L50 22H R31B, R38B R43B, R50B 5.6 C31, C38, C42, C49 1F GRM185B31C105KE43 16V B(10% 1.6mmx0.8mm C25, C28, C53 0.1F GRM188B31H104KA92 50V B(10% 1.6mmx0.8mm C31A, C38A C43A, C50A 0.068F GRM21BB11H683KA01 50V B(10% 2.0mmx1.25mm C31C, C43C 0.33F GRM219B31H334KA87 50V B(10% 2.0mmx1.25mm C1, C27 3.3F GRM188B31A335KE15 10V B(10% 1.6mmx0.8mm C2, C4, C5 C22, C23 1F GRM185B30J105KE25 6.3V B(10% 1.6mmx0.8mm C31B, C38B C43B, C50B 470pF GRM188B11H471KA 50V B(10% 2.0mmx1.2mm C28D, C53D 220F ECA1VMH221 35V 20% 8mmx11.5mm EEUFC1H100L 50V 20% 5mmx11mm Electrolytic Capacitor MURATA Panasonic C25D www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 10F 25/31 2011.06 - Rev.C Technical Note BD5446EFV Application Circuit Example(RL_SP=6) C1 3.3F GNDP1 VCCP1 1 C2 1F ) ) ( ) ( ( C4 1F C5 VCCP1 REG_G1 2 FILP 53 3 Power Limiter NC 52 4 FILA 51 5 REG_3 50 1F REG_G1 GNDA SYS_CLK (256fs) 0 Digital Audio Source (NOP) Driver 1P 0 (fs=32kHz48kHz) 9 I2S/LJ Interface 10 GNDP1 Control Interface I2S/LJ Selector x8 Over Sampling Digital Filter NC 40 Gain Selector OUT_DAC2 (Rch) GNDP2 Driver 2N 37 GNDP2 OUT_DAC1 (Lch) ERROR VCCA 100k DAC Selector 32 24 31 25 26 3.3F C27 REG_G2 VCCA NC High Temperature Protection Under Voltage Protection Clock Stop Protection 1F C28 220F C28D www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. R31B GNDP2 5.6 C31B 470pF 6 Rch (SDATA1) C31A 0.1F 1F C31 15H L31 29 VCCP2 REG_G2 0.47F C31C NC 30 Output Short Protection Output DC Voltage Protection 27 0.1F C38A 470pF C38B 5.6 R38B 33 DAC 10F C25D GNDP2 NC 34 22 GNDA GNDA Driver 2P 23 3.3V R24 C25 0.1F 36 NC 35 1FC23 L38 15H 38 20 21 1F C38 39 TEST 1F C22 0.1F 41 REG_G2 19 VSS Lch (SDATA1) 15H L43 42 PWM Modulator 18 VSS 6 C42 1F REG_G1 16 17 R43B GNDP1 5.6 C43B 470pF C43A 43 14 15 0.47F C43C 44 13 3.3V C53D 5.6 220F R50B 45 12 PDX C53 1F GNDP1 11 MUTE 0.1F C50A 470pF C50B 46 Driver 1N 0 RESET C49 1F NC 47 0 SDATA2 NC 48 8 LRCLK L50 15H 49 7 0 SDATA1 -con GNDA 6 BCLK (64fs) 54 28 VCCP2 26/31 2011.06 - Rev.C Technical Note BD5446EFV BOM list(RL_SP=6) Parts Parts No. Value Company Product No. Rated Voltage Tolerance Size IC U1 ROHM BD5446EFV 18.5mmx9.5mm Inductor L31, L38, L43, L50 15H SAGAMI DBE7210H-150M (20%) 10.5mmx6.4mm Resistor R31B, R38B R43B, R50B 5.6 ROHM MCR18PZHZFL5R60 1/4W F(1%) 3.2mmx1.6mm C31, C38, C42, C49 1F GRM185B31C105KE43 16V B(10% 1.6mmx0.8mm C25, C28, C53, C31A, C38A, C43A, C48A 0.1F GRM188B31H104KA92 50V B(10% 1.6mmx0.8mm C31C, C43C 0.47F GRM21BB31H474KA87 50V B(10% 2.0mmx1.2mm Capacitor MURATA C1, C27 3.3F GRM188B31A335KE15 10V B(10% 1.6mmx0.8mm C2, C4, C5 C22, C23 1F GRM185B30J105KE25 6.3V B(10% 1.6mmx0.8mm C31B, C38B C43B, C50B 470pF GRM188B11H471KA 50V B(10% 2.0mmx1.2mm C28D, C53D 220F ECA1VMH221 35V 20% 8mmx11.5mm EEUFC1H100L 50V 20% 5mmx11mm Electrolytic Capacitor Panasonic C25D www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 10F 27/31 2011.06 - Rev.C Technical Note BD5446EFV Output LC Filter Circuit An output filter is required to eliminate radio-frequency components exceeding the audio-frequency region supplied to a load (speaker). Because this IC uses sampling clock frequencies from 200kHz to 400kHz in the output PWM signals, the high-frequency components must be appropriately removed. This section takes an example of an LC type LPF shown in Fig.29, in which coil L and capacitor C compose a differential filter with an attenuation property of -12dB/oct. A large part of switching currents flow to capacitor C, and only a small part of the currents flow to speaker RL. This filter reduces unwanted emission this way. In addition, coil L and capacitor Cg compose a filter against in-phase components, reducing unwanted emission further. Filter constants depend on load impedances. The following are formulas to calculate values of L, C, and Cg when Q=0.707 is specified. 48, 49 or 38, 39 L L Cg C 45, 46 or 33, 34 L RL 2 1 C RL H 4 f C F 2 f C RL 2 Cg Cg 0 .2 C F Fig. 29 RL : Load impedance () fC : LPF cut off frequency (Hz) Following presents output LC filter constants with typical load impedances. fC = 30kHz fC = 40kHz RL L C Cg RL L C Cg 6 22H 0.68F 0.15F 6 15H 0.47F 0.1F 8 33H 0.47F 0.1F 8 22H 0.33F 0.068F 16 68H 0.22F 0.047F 16 47H 0.15F 0.033F Use coils with a low direct-current resistance and with a sufficient margin of allowable currents. A high direct-current resistance causes power losses. In addition, select a closed magnetic circuit type product in normal cases to prevent unwanted emission. Use capacitors with a low equivalent series resistance, and good impedance characteristics at high frequency ranges (100kHz or higher). Also, select an item with sufficient withstand voltage because flowing massive amount of high-frequency currents is expected. www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 28/31 2011.06 - Rev.C Technical Note BD5446EFV Notes for use 1 ) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated. 2 ) Power supply lines As return of current regenerated by back EMF of output coil happens, take steps such as putting capacitor between power supply and GND as a electric pathway for the regenerated current. Be sure that there is no problem with each property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and GND pins. 3 ) GND potential(Pin 6, 36, 37, 45, 46). Any state must become the lowest voltage about GND terminal and VSS terminal. 4 ) Input terminal The parasitic elements are formed in the IC because of the voltage relation. The parasitic element operating causes the wrong operation and destruction. Therefore, please be careful so as not to operate the parasitic elements by impressing to input terminals lower voltage than GND and VSS. Please do not apply the voltage to the input terminal when the power-supply voltage is not impressed. 5 ) Setting of heat Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. This IC exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. Class D speaker amplifier is high efficiency and low heat generation by comparison with conventional Analog power amplifier. However, In case it is operated continuously by maximum output power, Power dissipation (Pdiss) may exceed package dissipation. Please consider about heat design that Power dissipation (Pdiss) does not exceed Package dissipation (Pd) in average power (Poav). (Tjmax : Maximum junction temperature=150, Ta : Peripheral temperature[], ja : Thermal resistance of package[/W], Poav : Average power[W], : Efficiency) Package dissipation : Pd(W)=(Tjmax - Ta)/ja Power dissipation : Pdiss(W)= Poav x(1/- 1) 6 ) Actions in strong magnetic field Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction. 7 ) Thermal shutdown circuit This product is provided with a built-in thermal shutdown circuit. When the thermal shutdown circuit operates, the output transistors are placed under open status. The thermal shutdown circuit is primarily intended to shut down the IC avoiding thermal runaway under abnormal conditions with a chip temperature exceeding Tjmax = 150. 8 ) Shorts between pins and misinstallation When mounting the IC on a board, pay adequate attention to orientation and placement discrepancies of the IC. If it is misinstalled and the power is turned on, the IC may be damaged. It also may be damaged if it is shorted by a foreign substance coming between pins of the IC or between a pin and a power supply or a pin and a GND. 9 ) Power supply on/off (Pin 25, 28, 29, 53, 54) In case power supply is started up, RESETX(Pin 12), MUTEX(Pin 13) and PDX (Pin 14) always should be set Low. And in case power supply is shut down, it should be set Low likewise. Then it is possible to eliminate pop noise when power supply is turned on/off. And also, all power supply terminals should start up and shut down together. 10 ) ERROR terminal(Pin 24) A error flag is outputted when Output short protection and DC voltage protection in the speaker are operated. These flags are the function which the condition of this product is shown in. 11 ) N.C. terminal(Pin 26, 30, 34, 35, 41, 47, 48, 52) N.C. terminal (Non Connection Pin) does not connect to the inside circuit. Therefore, possible to use open. 12 ) TEST terminal(Pin 19, 20) TEST terminal connects with ground to prevent the malfunction by external noise. 13 ) Precautions for Spealer-setting If the impedance characteristics of the speakers at high-frequency range while increase rapidly, the IC might not have stable-operation in the resonance frequency range of the LC-filter. Therefore, consider adding damping-circuit, etc., depending on the impedance of the speaker. 14) Notes about the phase of SYS_CLK (Pin7) and BCLK (Pin8) If the rising edge of SYS_CLK (Pin7) and BCLK (Pin8) becomes simultaneous, noise or sound shutdown may occur. Please cope with it, when the rising edge of CYC_CLK and BCLK becomes simultaneous. (Example: Insert RC filter in BCLK) www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 29/31 2011.06 - Rev.C Technical Note BD5446EFV Allowable Power Dissipation 7 PCB 6.2W Power Dissipation Pd W) 6 5 PCB 4.5W 4 3 PCB 2.0W 2 1 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Ambient Temperature:Ta( ) Measuring instrument : TH-156(Shibukawa Kuwano Electrical Instruments Co., Ltd.) Measuring conditions : Installation on ROHM's board Board size : 70mmx70mmx1.6mm(with thermal via on board) Material : FR4 The board on exposed heat sink on the back of package are connected by soldering. PCB : 1-layer board(back copper foil size: 0mmx0mm), ja62.5/W PCB : 2-layer board(back copper foil size: 70mmx70mm),ja27.8/W PCB : 4-layer board(back copper foil size: 70mmx70mm),ja20.2/W www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 30/31 2011.06 - Rev.C Technical Note BD5446EFV Ordering part number B D 5 Part No. 4 4 6 Part No. E F V - Package EFV : HTSSOP-B54 E 2 Packaging and forming specification E2: Embossed tape and reel HTSSOP-B54 <Tape and Reel information> 18.50.1 (MAX 18.85 include BURR) +6 4 -4 (6.0) 1PIN MARK 1.00.2 0.50.15 (5.0) 1 Embossed carrier tape (with dry pack) Quantity 1500pcs 28 7.50.1 9.50.2 54 Tape Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 27 +0.05 0.17 -0.03 0.8 0.080.05 1.0MAX 0.850.05 S 0.08 S 0.65 +0.05 0.22 -0.04 0.08 1pin M Reel (Unit : mm) www.rohm.com (c) 2011 ROHM Co., Ltd. All rights reserved. 31/31 Direction of feed Order quantity needs to be multiple of the minimum quantity. 2011.06 - Rev.C Datasheet Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you (Note 1) , transport intend to use our Products in devices requiring extremely high reliability (such as medical equipment equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property ("Specific Applications"), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM's Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASS CLASSb CLASS CLASS CLASS CLASS 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM's Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual ambient temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice - GE (c) 2014 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label QR code printed on ROHM Products label is for ROHM's internal use only. Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign Trade act Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with ROHM representative in case of export. Precaution Regarding Intellectual Property Rights 1. All information and data including but not limited to application example contained in this document is for reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable for infringement of any intellectual property rights or other damages arising from use of such information or data.: 2. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any third parties with respect to the information contained in this document. Other Precaution 1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM. 2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of ROHM. 3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons. 4. The proper names of companies or products described in this document are trademarks or registered trademarks of ROHM, its affiliated companies or third parties. Notice - GE (c) 2014 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet General Precaution 1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny ROHM's Products against warning, caution or note contained in this document. 2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using ROHM's Products, please confirm the la test information with a ROHM sale s representative. 3. The information contained in this doc ument is provi ded on an "as is" basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice - WE (c) 2014 ROHM Co., Ltd. All rights reserved. Rev.001 Datasheet bd5446efv - Web Page Part Number Package Unit Quantity Minimum Package Quantity Packing Type Constitution Materials List RoHS bd5446efv HTSSOP-B54 1500 1500 Taping inquiry Yes