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Small-sized Class-D S peaker Amplifiers
Analog Input
Monaural Class-D Speaker Amplifier
BD5468GUL
●Description
BD5468GUL is a monaural Class-D speaker amplifier that contained ALC function for mobile phone, portable type
electronic devices etc. LC filter of speaker output is not needed, can form monaura l speaker amplifier. with 3 external parts.
ALC, short for Automatic Level Control, is a function that automatically adjusts up to the level of suppression of distortion
(clip) of output wave form during excessive input. The time until the limit release operation of output level is called the
release time (or recovery time). This IC adopts high-speed release time (4ms/1dB Typ.) and suits the application which
repeats big volume in the short time such as the camera shutter sound.
Through Class-D operation, efficiency is high low power consumption that is why it’s suitable for battery drive application.
The current consumption duri ng shutdown when lowered to 0.01μA(Typ.), from the shutdown to the operation tim e is early
and at the same time pop sound is fe w that is why its also suitable in repeating active and shutdown.
●Feature
1) Contains Digital ALC (A utomatic Level Control) Function
2) External Parts: 3points
3) Ultra slim type package: 9pin WL-CSP(1.7×1.7×0.55mmMax.)
4) BD5460/61GUL (No ALC Function, Gain Fixed Goods) Pin Compatible Specs
BD5465/66/67GUL (ALC Function, Gain Fixed Goods) Pin Compatible Specs
5) Maximum Gain: 13dB (Typ.) [during ALC operation, 13～-2dB@1dB Step]
6) ALC high speed release (recovery) time: 4ms/1dB(Typ.)
7) Limit output power : 0.7W (Typ.) [VDD=4.2V, RL=8Ω, THD+N≦1%]
: 0.5W (Typ.) [VDD=3.6V, RL=8Ω, THD+N≦1%]
8) Audio Analog Input (corresponds to single-end input / differential input)
9) Output LC filter free
10) Pop noise suppression circuit
11) Shutdown Function (use as mute at the same time) [lo w shutdown current = 0.01μA (Typ.)]
12) Contains protection circuit: output short, thermal shutdown, under voltage lockout (UVLO)
●Applications
Mobile phone, Portable audio device, PND, DSC, Note-PC etc.
●Absolute Maximum Rating (Ta=+25℃)
Parameter Symbol Ratings Unit
Power Supply Voltage VDDmax
PVDDmax 7.0 V
Power Dissipation Pd 690※ mW
S torage Temperature Range Tstg -55 ～ +150 ℃
SDNB Pin Input Range VSDNB -0.3～VDD+0.3 V
IN+, IN- Pin Input Range VIN -0.3～VDD+0.3 V
※ In case Ta=+25℃ or more, 5.52 mW decrease per 1℃
When mounting Rohm Typical Board 50.0mm×58.0mm (Material :Glass Epoxy)
●Operation Range Parameter Symbol Range Unit
Temperature Topr -40 ～ +85 ℃
Power Supply Voltage VDD
PVDD +2.5 ～ +5.5 V
Common Mode Input Voltage Range VIC +0.5 ～ VDD-0.8 V
◎ This product is not designed for protection against radioactive rays.
No.10101EAT08
Technical Note
2/19
BD5468GUL
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●Electrical Char acteristic (Ta=+25℃, VDD=+3.6V, Unless specified otherwise)
Parameter Symbol Limits Unit Conditions
Min. Typ. Max.
＜All Device＞
Circuit current (no signal) ICC ― 3 6 mA
IC Active, No Load
VSDNB =VDD
Circuit current (shutdown) ISDN ― 0.01 2 μA IC Shutdown
VSDNB =GND
＜Audio Feature＞
Limit output power PO 0.035
×VDD20.044
×VDD20.055
×VDD2W BTL, f=1kHz, RL=8Ω
THD+N≦1% , *1
Total harmonic distortion THD+N ― 0.2 1 %
BTL, fin=1kHz, RL=8Ω
PO =0.3W, *1
Maximum Gain GMAX 12 13 14 dB BTL, *1
ALC Limit level VLIM 1.5
×VDD 1.68
×VDD 1.89
×VDD Vpp BTL, *1
ALC Release level VREL 1.19
×VDD 1.34
×VDD 1.5
×VDD Vpp BTL, *1
Switching frequency fOSC 150 250 350 kHz
Start-up time TON 0.73 1.02 1.71 msec
Audio input resistance Ri 36 55 74 kΩ Gain=13dB
＜Control Terminal＞
SDNB terminal
Threshold voltage
H VSDNBH 1.4 ― VDD V IC Active
L VSDNBL 0 ― 0.4 V IC Shutdown
SDNB terminal
Inflow Current
H ISDBNH 12 24 36 μA VSDNB =3.6V
L ISDNBL -5 ― 5 μA VSDNB =0V
*1 Filter bandwidth for measurement :400～30kHz, LC filter for AC measurement :L=22μH / C=1μF, BTL :Voltage between A3,C3
●Shutdown control
Control terminal Conditions
SDNB
H IC operation (active)
L IC stop (shutdown)
●ALC Parameter ALC Parameter
Attack Time (Typ.) Release Time(Typ.) Gain Switch Step (Typ.)
～1ms/1dB @ fin=100Hz
～0.5ms/1dB @ fin=1kHz
～0.05ms/1dB @ fin=10kHz
4ms/1dB
@ fin=100～10kHz ±1dB
The gain switch timing durin g ALC operatio n occurs at zero cross point of audio output voltage.
For that, attack time, release time will change at input frequency “fin”.
ALC Parameter is fixed. ALC operation doesn’t correspond to noise of impulse.
Technical Note
3/19
BD5468GUL
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●Measurement Circ uit Dia gram
<Audio Characteristics Method of Evaluati on >
■In case LC filter is not used
■In case LC filter is used
Audio characteristics can be measured to insert LC filter between output pin and speaker load, if you don’t have
measurement equipment for switching amplifier , like AUX-0025, Audio Precision.
Arrange the LC filter directly close to output pin.
In case of L=22μH, C=1μF, cut off frequency becomes:
For Inductor L, please use huge current type. (Reference)TDK : SLF12575T-220M4R0
34kHz
F1H 222 1
LC2 1
fc
Shutdown Signal C 2
SDNB
B1 B2
VDD PVDD
A1
C 1
C3
A3
A2 B3 PGNDGND
C3
10uF
H: IC Active
L: IC Shutdown
0. 1uF
0. 1uF
+Battery
IN+
IN-
OUT+
OUT-
150k
(Typ .)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
A
LC
LPF
AP AUX-0025 Audio
Precision
(AP)
Measurement Instrument
BTL
C 2
C 1
Audio Precision
(AP )
Shutdown Signal C 2
SDNB
B1 B2
VDD PVDD
A1
C 1
C3
A2 B3 PGNDGND
C3
10uF
H : IC Active
L: IC Shutdown
0. 1uF
0. 1uF
+Battery
IN+
IN-
150k
( Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
A
LC
A3
C 2
C 1 BTL
1uF
1uF
22uH
22uH
Technical Note
4/19
BD5468GUL
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●External Dimension Diagram
●Block Diagram ●Pin Arrangem ent (Bottom View)
●Pin Explanation
Pin No. Pin Name Explanation
A1 IN+ Audio differential input+ terminal
A2 GND GND terminal (signal)
A3 OUT- Class-D BTL output - terminal
B1 VDD VDD terminal (signal)
B2 PVDD VDD terminal (power)
B3 PGND GND terminal (power)
C1 IN- Audio differential input - terminal
C2 SDNB Shutdown control terminal
C3 OUT+ Class-D BTL output+ terminal
(Unit : mm)
5468
LOT No.
9pin WL-CSP (VCSP50L1)
[ 1.7×1.7×0.55mm Max, 0.5mm Pitch ]
Top View Bottom View
Side View
C2
SDNB
B1 B2
VDD PVDD
A1
C1
IN+
IN-
C3
A3
OUT+
OUT-
A2 B3 PGNDGND
150k
(Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
Rf
Rf
ALC
IN+ GND OUT-
VDD PVDD PGND
IN- SDNB OUT+
A1 A2 A3
B1 B2 B3
C1 C2 C3
Index Post
Technical Note
5/19
BD5468GUL
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●Application circuit example
SHORT the power supply pin VDD (B1), PVDD (B2) at board pattern, then use singleness power supply.
Fig1. Differential Input (With Input Coupling Capacitor)
Fig2. Differential Input (Without Input Coupling Capacitor)
C 2
SDNB
B1 B2
VDD PVDD
A
1
C 1
C 3
A
3
A
2B3 PGNDGND
C3
10uF
H :IC Active
L: IC Shutdown
Shutdown Signal
+Battery
IN+
IN-
OUT +
OUT -
150k
( Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
A
LC
Differential
Input
A
udio
Input +
A
udio
Input -
Class-D BTL Output
Singleness power supply(+2.5～+5.5V)
Power VDD
Signal VDD
Shutdown Control
Power GND
Signal GND
Audio Differential Input
C 2
SDNB
B1 B2
VDD PVDD
A
1
C 1
C 3
A
3
A
2 B3 PGNDGND
C3
10uF
H :IC Active
L: IC Shutdown
0.1uF
0.1uF
Shutdown Signal
+Battery
IN+
IN-
OUT +
OUT -
150k
( Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
A
LC
Differential
Input
A
udio
Input +
A
udio
Input -
Shutdown Control
Class-D BTL Output
Signal GND Power GND
Power VDD Signal VDD
Singleness power supply (+2.5～+5.5V)
Audio Differential Input
Technical Note
6/19
BD5468GUL
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C 2
SDNB
B1 B2
VDD PVDD
A
1
C 1
C 3
A
3
A
2 B3 PGNDGND
C3
10uF
H : IC Active
L: IC Shutdown
0. 1uF
A
udio
In
p
u
t
0. 1uF
Shutdown Signal
+Battery
IN+
IN-
OUT +
OUT -
150k
( Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
ALC
Class-D BTL Output
Signal GND Power GND
Singleness power supply (+2.5～+5.5V)
Signal VDD Power VDD
Audio Single End Input
Shutdown Control
C2
SDNB
B1 B2
VDD PVDD
A
1
C1
C3
A
3
A
2 B3 PGNDGND
C3
10uF
H :IC Active
L: IC Shutdown
0. 1uF
A
udio
Input
0. 1uF
Shutdown Si
g
nal
+Battery
IN+
IN-
OUT +
OUT -
150k
( Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
A
LC
Signal GND Power GND
Class-D BTL Output
Singleness power supply (+2.5～+5.5V)
Signal VDD Power VDD
Audio Single End Input
Shutdown Control
Fig4. Single end input (during IN- Input)
Fig3. Single end input (during IN+ input)
Technical Note
7/19
BD5468GUL
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●About the difference of differential input and si ngle end input
・BD5468GUL uses full differential amplifier.
BD5468GUL is a Class-D but, in relation to Audio Input and Output, is same with the conventional Class-AB Amplifier.
For simplicity purposes of the diagram, the Class-D amplifier output stage is omitted in the following explanation.
About the resistor, signal on the diagram
Gives meaning to changes of gain setting b y means of ALC Control.
○About single end input
・Input is possible whether IN+ or IN- Pin.
Don’t make input pin open, throug h the input coupling capacitor, please connect to GND as seen on the example above.
Audio input pin should make “ m ute” condition, not “open” condition when yo u don’t input any signal.
・During single end input IN+ and IN-, there is a difference with the phase relation of input and output.
Because of differential amplifier, if input (IN+ - IN-), output(OUT+ - OUT-), the audio input and output phase relation will
become:
Phase IN+ Input IN- Input
Audio Input ⇒ output (OUT+ - OUT-) Same phase Opposite phase
Audio
Input
0V
A1
IN+ A3
OUT-
C1
0V ー
(OUT+ - OUT-)
C3
OUT+
IN- ー
Audio
Input
0V
A1
IN+ A3
OUT-
C1
0V ー
C3
OUT+
IN-
ー
1) Differential Input
Audio
Input
0V A1
IN+ A3
OUT-
C1
( IN+ - IN- )
C3
OUT+
Opposite
phase
IN-
Audio
Input
0V
2) Single end input (during IN+input )
3) Single end input (during IN-input )
Opposite
phase
(IN+ - IN- )
Same phase
Opposite phase
Opposite
phase
Opposite
phase
(IN+ - IN-)
(OUT+ - OUT-)
(OUT+ - OUT-)
Technical Note
8/19
BD5468GUL
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A
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○Gain calculation
When Input Level is calculated at IC typical and audio source typical, when input coupling capacitor (Ci) value is large
enough,every gain during the differential input and single end input will become:
Typical Input Level Differential Output Single End Output
IC Formula①
Audio Source Formula② Formula①
1. IC reference(Difference Input, Single End Input) :Formula ①
VIN means the Input Voltage between IC Input Pin (IN+, IN-), VOUT means the output voltage between IC Output Pin
( OUT+, OUT- ). During differential input and single end input, the gain calculation formula at IC reference which
includes ALC operation is written below:
Gain = 20×log | VOUT/VIN | =+13～-2 (Typ.) [dB] ・・・ Formula①
2. Audio Source reference(Differential Input) : Formula ②
When the input level of audio source is Vins, the relation with the input voltage VIN between IC input pin is written
below:
Vins = VIN / 2
During differential input, at audio source referece that includes ALC operation, gain calculation formu la will become :
Gain = 20×log | VOUT / Vins | = 20× log | 2×VOUT / VIN | = +19～+4 (Typ.) [dB] ・・・Formula②
3. Audio Source referenc e (Single End Input) :Formula ①
When the Input level of audio source is Vins, the relation with input voltage VIN between IC input pin (IN+,IN-)
becomes:
Vins = VIN
During single end input, at the audio source that includes ALC operation, gain calculation formula becomes:
Gain = 20×log | VOUT / Vins | = 20× log | VOUT / VIN | = +13～-2 (Typ.) [dB] ・・・ Formula①
【Differential Input】 【single end input】
C2
SDNB
B 1 B 2
VDD PVDD
A
1
C1
C3
A
3
A
2 B 3 PGND GND
Cs
H :IC Active
L : IC Shutdown
0 . 1 uF
0 . 1 uF
Shutdown Signal
+Battery
IN+
IN-
OUT+
OUT-
150k
(Typ.) BIAS
OSC
PWM H -
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
ALC
Vins Ci
Vins
VIN
(= 2Vins)
Ci
<
A
udio Source >
C2
SDNB
B 1 B 2
VDD PVDD
A
1
C1
C3
A
3
A
2 B 3 PGND GND
Cs
H:IC Active
L: IC Shutdown
0.1uF
0.1uF
Shutdown Signal
+Battery
IN+
IN-
OUT+
OUT-
150k
(Typ.)
BIAS
OSC
PWM H -
Bridge
Shutdown
Control
Ri
Ri
R
f
R
f
ALC
Vins Ci VIN
(=Vins)
Ci
<
A
udio Source >
Technical Note
9/19
BD5468GUL
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A
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●Audio Input Pin External LPF c onnection exam ple
■External LPF connection ex ample
The connection example of 1st -order LPF which is formed at Resistor RLPF and Capacitor CLPF , to the Audio Input Pin
IN+/- (A1, C1 Pin) is shown below. The cut frequency of in put LPF, together with the single end input an d differential input
is written below:
fcLPF = 1 / (2×π×RLPF×CLPF) [Hz]
Ex) fcLPF=10kHz ⇒ C
LPF =0.01μF, RLPF=1.59kΩ
1) During single end input
When LPF is connected to audio input pi n at single end input setting, at start-up characteristics of audio i nput pin IN+/-,
during start-up with unbalance (po wer supply ON/OFF, or shutdown ON/OFF), there is a risk that POP sound will occur
so please be careful.
When no audio input, and in order to prevent output noise, please make previous IC “mute” condition, not “open”
condition. Please refer at the same time to POP Sound countermeasure example.
C 2
SDNB
B1
VDD B2 PVDD
A
1
IN +
C 1
IN -
C3
A
3
A
2 B3
GND PGND
Ci
Ci
Cs
OUT +
OUT -
Speaker
+Battery
C
LPF
RLPF
Ro
Front IC
C
LPF
R
LPF
H
：IC Active
L：IC Shutdown
Shutdown Signal
150k
(Typ .)
Ri
Ri
A
LC
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
R
f
R
f
Pop sound
countermeasure →
Input Impedance
Technical Note
10/19
BD5468GUL
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A
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2) Differential Input
■Caution during E xternal LPF Setting
External LPF Resistor RLPF which is composed of IC input resistor Ri, forms input impedan ce.
The bigger the resistor value of LPF resistor RLPF, the more it will decrease the gain.
When the input capacitor Ci has enough large capacity value, the relation amon g external LPF resistor RLPF and IC input
resistor Ri and Gain will beco m e:
Gain = 20×log | Rf / (Ri + RLPF ) | [dB]
Input resistor Ri of BD5468GUL and resistor value of feedback resistor Rf will become the following below,
during ALC operation, changes at ±1dB step, and b ecomes 16 stages switch specs.
#1. Ri=55kΩ(Typ.), Rf=245kΩ(Typ.) @Gain=13dB
#2. Ri=60kΩ(Typ.), Rf=240kΩ(Typ.) @Gain=12dB
#3. Ri=66kΩ(Typ.), Rf=234kΩ(Typ.) @Gain=11dB
↓
#15. Ri=159kΩ(Typ.), Rf=141kΩ(Typ.) @Gain=-1dB
#16. Ri=167kΩ(Typ.), Rf=132kΩ(Typ.) @Gain=-2dB
Also with the driver ability of previous IC step, after checking, constant setting of external LPF and Resistor RLPF.
C 2
SDNB
B1
VDD B2 PVDD
A
1
IN+
C 1
IN-
C 3
A
3
A
2B3
GND PGND
Ci
Ci
Cs
OUT +
OUT -
Speaker
+Battery
C
LPF
C
LPF
RLPF
RLPF
Ro
Ro
H
：
IC Active
L：
IC Shutdown
Shutdown Signal
Front IC LPF
150k
(Typ.)
Ri
Ri
A
LC
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
R
f
R
f
Input Impedance
Technical Note
11/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
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●Evaluation Board Circuit Diagram
※Power Supply terminals VDD(B1), PVDD(B2) are SHORT in the board pattern and use a single power.
●Evaluation Board Parts List
Qty. Item Description SMD Size Manufacturer/
Part Number
2 C1, C2 Capacitor, 0.1μF 0603 Murata
GRM188R71C104KA01D
1 C3 Capacitor, 10μF A (3216) ROHM
TCFGA1A106M8R
1 S1 Slide Switch 4mm X 10.2mm NKK
SS-12SDP2
1 U1 IC, BD5468GUL,
Mono Class-D Audio Amplifier 1.7mm X 1.7mm
WLCSP Package ROHM
BD5468GUL
1 PCB1 Printed-Circuit Board,
BD5468GUL EVM ― ―
●About the external part
① Input coupling capacitor (C1, C2)
Input coupling capacitor is 0.1μF.
Input impedance during maximum gain 13dB is 55kΩ (Typ.). A high-pass filter is composed by the input coupling
capacitor and the input impedance.
Cut-off frequency”fc” by the formula below, through input coupling capacitor C1(=C2) and input impedance Ri.
In case of Ri=55kΩ, C1(=C2)=0.1μF, cut-off frequency is about 29Hz
② Power Supply Decoupling Capacitor (C3)
Power Supply Decoupling Capacitor is 10uF. When the capacity value of Power Supply Decoupling Capacitor is made
small, it will have an influence to the audio characteristics. W hen making it small, be careful with the audio character istics
at actual application. ESR (equivalent series resistor) is low enough; please use capacitor with capacity value of 1μF or
more.
BD5468GUL
C2
SDNB
B1 B2
VDD PVDD
A1
C1
IN+
IN-
C3
A3
OUT+
OUT-
A2 B3 PGNDGND
C1
Differential
Input
H：IC Active
L：IC Shutdown
Audio
Input+
Audio
Input-
C2
0.1uF
0.1uF
C3
10uF
VDD
Shutdown Signal
150k
(Typ.)
BIAS
OSC
PWM H-
Bridge
Shutdown
Control
Ri
Ri
Rf
Rf
ALC
Connect to GND
Connect to input signa l
Connect to Speaker
Connect to Power Supply
(VDD=+2.5～5.5V)
Audio Input
VDD
GND
ٛٛٛٛ
C1Ri2 1
fc
Technical Note
12/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
●Evaluation Board PCB Layer
TOP Layer Silk Pattern
TOP Layer
Bottom Layer
BD5468GUL
Technical Note
13/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
●About IC Thermal Design
The IC Characteristics has a big re lation with the temperature that will be used, to exceed the maximum tolerance junction
temperature, can deteriorate and destroy it. Instant destruction and lon g-time op eratio n, from these 2 standpoints, there is a
need to be careful with regards to IC thermal. Please be careful with the next points.
The absolute maximum rating of IC shows the maximum junction temperature (TjMAX.) or the operation temperature range
(Topr), so refer to this value, use Pd-Ta characteristics (T hermal reduction ratio curve). If input signal is excessive at a state
where heat radiation is not sufficient, there will be TSD(Thermal Shutdown)
For TSD, the chip temperature oper ates at around 180℃, releases if its around 120℃ or less. Since the aim is to prevent
damage on the chip, please be careful because the long use time at the vicinity where TSD operates can deteriorate the
dependency of the IC.
Thermal Reduction Ratio Curve
The value of power dissipation changes based on the board that will be mounted.
The power dissipation of main IC during the heat diss ipation desi gn of many mounted boards, will beco me bigger than the
value of the above graph.
Measurement Condition: ROHM Typical Board Mount
Board Size: 50mmx58mm
Note : This value is the real measurement, but not the guaranteed value.
Reference Data VCSP50L1
2.0
1.5
1.0
0.5
0.0
0 25 50 75 100 125
150
Perimeter Temperature Ta(℃)
Power Dissipation Pd(W)
0.69W
θja = 181.8℃/W
85
Technical Note
14/19
BD5468GUL
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A
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Evaluation data - T
y
pical Characteristics
(
1/4
)
Figure.1 Figure.2
Figure.3 Figure.4
Figure.5 Figure.6
Figure.7 Figure.8
Efficiency - Output power
f=1kHz, RL=8Ω+33uH
0
10
20
30
40
50
60
70
80
90
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
Output Power [W]
Efficiency [%]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Supply Current vs Output power
f=1kHz, RL=8Ω+33uH
0
50
100
150
200
250
300
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
Output Power [W]
Icc [mA]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Efficiency vs Output power
f=1kHz, RL=4Ω+33uH
0
10
20
30
40
50
60
70
80
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Output Power [W]
Efficiency [%]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Supply Current vs Output power
f=1kHz, RL=4Ω+33uH
0
50
100
150
200
250
300
350
400
450
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Output Power [W]
Icc [mA]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Power dissipation vs Output power
f=1kHz, RL=8Ω+33uH
0
0.05
0.1
0.15
0.2
0.25
0.3
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
Output Power [W]
Pd [W]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Power dissipation vs Output power
f=1kHz, RL=4Ω+33uH
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Output Power [W]
Pd [W]
VDD=2.5V
VDD=3.6V
VDD=5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Shutdown Current vs Power Supply
RL=No load, No signal
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0123456
VDD [V]
I
SDN
[μA]
Supply Current vs Power Supply
RL=No load, No signal
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0123456
VDD [V]
I
CC
[mA]
●Evaluation data – Typical characteristics (1/4)
Fig.5 Fig.6
Fig.7 Fig.8
Fig.9 Fig.10
Fig.11 Fig.12
Technical Note
15/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
Evaluation data - T
y
pical Characteristics
(
2/4
)
Figure.9
Figure.10 Figure.11
Figure.12 Figure.13
Figure.14 Figure.15
Output Power vs Power Supply
RL=4Ω, f=1kHz, 400Hz-30kHz BPF
0.0
0.5
1.0
1.5
2.0
2.5
22.533.544.555.56
VDD[V]
Output Power [W]
THD+N≦1%
Output power vs Load Resistance
THD+N=1%, f=1kHz, 400Hz-30kHz BPF
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
4 8 12 16 20 24 28 32
RL[Ω]
Output Power [W]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Total Harmonic Distortion + Noise vs Frequency
VDD=5.0V RL=8Ω, 400Hz-30kHz BPF
0.01
0.1
1
10
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
Po=25mW
Po=100mW
Po=250mW
Output Power vs Power Supply
RL=8Ω, f=1kHz, 400Hz-30kHz BPF
0.0
0.2
0.4
0.6
0.8
1.0
1.2
2 2.5 3 3.5 4 4.5 5 5.5 6
VDD[V]
Output Power [W]
THD+N≦1%
Total Harmonic Distortion + Noise vs Frequency
VDD=3.6V RL=8Ω, 400Hz-30kHzBPF
0.01
0.1
1
10
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
Po=25mW
Po=100mW
Po=250mW
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Po = 250mW
Po = 100mW
Po = 25mW
Po = 250mW
Po = 100mW
Po = 25mW
Total Harmonic Distortion + Noise vs Output Power
RL=8Ω, f=1kHz, 400Hz-30kHz BPF
0.1
1
10
100
0.01 0.1 1 10
Output Power [W]
THD+N [%]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Total Harmonic Distortion + Noise vs Output Power
RL=4Ω, f=1kHz, 400Hz-30kHz BPF
0.1
1
10
100
0.01 0.1 1 10
Output Power [W]
THD+N [%]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
●Evaluation data – Typical characteristics (2/4)
Fig.13
Fig.14 Fig.15
Fig.16 Fig.17
Fig.18 Fig.19
Technical Note
16/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
Evaluation data - T
y
pical Characteristics
(
3/4
)
Figure.16 Figure.17
Figure.18 Figure.19
Figure.20 Figure.21
Figure.22 Figure.23
Output Power vs Input Level @ sweep up
RL=8Ω, f=1kHz, 400Hz-30kHz BPF
1m
10m
100m
1
10
-30 -25 -20 -15 -10 -5 0 5
Vin [dBV]
Output Power [W]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Output Power vs Input Level @ sweep up
RL=4Ω,f=1kHz, 400Hz-30kHz BPF
1m
10m
100m
1
10
-30 -25 -20 -15 -10 -5 0 5 10 15
Vin [dBV]
Output Power [W]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Total Harmonic Distortion + Noise vs Frequency
VDD=2.5V, RL=8Ω, 400Hz-30kHz BPF
0.01
0.1
1
10
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
Po=25mW
Po=100mW
Po=150mW
Total Harmonic Distortion + Noise vs Frequency
RL=8Ω, Po=125mW, 400Hz-30kHz BPF
0.01
0.1
1
10
10 100 1k 10k 100k
Frequency [Hz]
THD+N [%]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Gain_vs_Frequency
RL=4Ω, Vin=0.5Vpp, 400Hz-30kHz BPF
0
2
4
6
8
10
12
14
10 100 1k 10k 100k
Frequency [Hz]
Gain [dB]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Gain vs Frequency
RL=8Ω, Vin=0.5Vpp, 400Hz-30kHz BPF
0
2
4
6
8
10
12
14
10 100 1k 10k 100k
Frequency [Hz]
Gain [dB]
VDD=2.5V
VDD=3.6V
VDD=5.0V
Po = 150mW
Po = 100mW
Po = 25mW
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Total Harmonic Distortion + Noise vs Input Level @ sweep up
RL=4Ω,f=1kHz, 400Hz-30kHz BPF
0.1
1
10
100
-30 -25 -20 -15 -10 -5 0 5 10 15
Vin [dBV]
THD+N [%]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
Total Harmonic Distortion + Noise vs Input Level @ sweep up
RL=8Ω,f=1kHz, 400Hz-30kHz BPF
0.1
1
10
100
-30 -25 -20 -15 -10 -5 0 5
Vin [dBV]
THD+N [%]
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
VDD = 2.5V
VDD = 3.6V
VDD = 5.0V
●Evaluation data – Typical characteristics (3/4)
Fig.20 Fig.21
Fig.22 Fig.23
Fig.24 Fig.25
Fig.26 Fig.27
Technical Note
17/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
Evaluation data - T
y
pical Characteristics
(
4/4
)
Figure.24 Figure.25
Figure.26 Figure.27
Waveform during Shutdown
-0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4
Time [msec]
Waveform during Start-up
-0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4
Time [msec]
ALC Limit Operation Waveform
f=1kHz
-101234567
Time [msec]
ALC Release Operation Waveform
f=1kHz
-10 0 10 20 30 40 50 60 70
Time [msec]
2V / Div. 2V / Div.
1V / Div. 1V / Div.
INPUT
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
Ton ( Wake-up Time)
●Evaluation data – Typical characteristics (4/4)
Fig.28 Fig.29
Fig.30 Fig.31
Technical Note
18/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
●Notes for use
(1) The numerical value and the data of the mention ar e a des i gn represe ntative value and a re not the on e which guar ante es
the value.
(2) It is convinced that it should recommend application circuit exam ple b ut in case of use, we request the confirmation of the
characteristic more sufficiently. When changing an external part fixed number and becoming use, it considers sprawl of
the external part and our company's LSI including the transition characteristic in addition to the stillness characteristic and
so on, see and fix an enough margin.
(3) Absolute maximum ratings
This IC may be damaged if the absolute maximum ratings for the applied voltage, temperature range, or other
parameters are exceeded. Therefore, avo id using a voltage or temperature that exceeds the absolute maximum ratings.
If it is possible that absolute maximum ratings will be exceeded, use fuses or other physical safety measures and
determine ways to avoid exceeding the IC's absolute maximum ratings.
(4) GND terminal’s potential
Try to set the minimum voltage for GND terminal’s potential, regardless of the operation mode.
(5) Shorting between pins and mounting errors
When mounting the IC chip on a board, be very careful to set the chip's orientation and position precisely. When the
power is turned on, the IC may be dama ged if it is not mounted correctly. T he IC may also be damaged if a short occ urs
(due to a foreign object, etc.) between two pins, between a pin and the power supply, or between a pin and the GND.
(6) Operation in strong magnetic fields
Note with caution that operation faults may occur when this IC operates in a strong magn etic field.
(7) Thermal design
Ensure sufficient margins to the thermal design by taking in to account the all owable power dissipation during actua l use
modes, because this IC is power amplifier. When excessive signal inputs which the heat dissipation is insufficient
condition, it is possible that thermal shutdown circuit is active.
(8) Thermal shutdown circuit
This product is provided with a built-in thermal shutdown circuit. When the thermal shutdown circuit operates, the outpu t
transistors are placed under open status. The thermal shutdown circuit is primarily intend ed to shut down the IC avoiding
thermal runaway under abnormal conditions with a chip temperature exceeding Tjmax=+150℃, and is not intended to
protect and secure an electrical appliance.
(9) Load of the output terminal
This IC corresponds to dynamic speaker load, and doesn't correspond to the load except for dynamic speakers. When
using speaker load 8 Ω or less (especially 4Ω), there will be a risk of generating distortion at the speaker output wave form
during ALC limit operation.
(10) The short protection of the output terminal
This IC is built in the short protection for a pr otection of output transistors. When the short protection is operated, output
terminal become Hi-Z condition and is stopped with latch. Once output is stopped with latch, output does not recover
automatically by canceling the short-circuiting condition. The condition of stopping with latch is cancelled, when power
supply or mute signal is turne d off and turned on again.
(11) Operation Range
The rated operating power supply voltage range (VDD=+2.5V～+5.5V) and the rated operating temperature range
(Ta=-40℃～+85℃) are the range by which basic circuit functions is operat ed. Characteristics and rated output po wer are
not guaranteed in all power supply voltage ranges or temperature ranges.
(12) Electrical Characteristics
Every audio characteristics list of the limit output power, total harmonic distortion, maximum gain, ALC limit level, ALC
release level etc. sho ws the typical characteristics of the device, highl y dependent to the board lay-out, parts to be used,
power supply. The value when the device and each component are directly mounted to the board of Ro hm.
(13) Power Supply
Since the Power Supply Pin for signal (VDD) and power supply for Power (PVDD) is SHORT at internal, short the board
pattern, then use a single power supply. Also, the power supply li ne of class-D sp eaker amplifi er flows big peak en ergy. It
will influence the audio characteristics based on the capacity value of power supply decoupling capacitor, arrangement.
For the power supply decoupling capacitor, please arrange appropriately the low capacity (1μF or more) of ESR
(equivalent series resistor) directly near to IC Pin.
(14) ALC (Automatic Level Control) Function
The ALC automatically adjusts the audio output level, and a function that prevents the over output to the speaker. When
ALC function is working, gain switches at zero-cross point of audio outp ut normally. If the time that audio output reaches
to zero-cross point is long, gain switches at about 1msec later (attack time), at about 25msec later (release time). So,
attack time and release time will change at audio input frequency. ALC parameter is fixed. The system does not
correspond to noise of impulse.Also, ALC limit control will become a power supply tracking type, limit output power is
dependent to power supply voltage. The ALC characteristics of limit output power, ALC limit and release limit will be
influenced by the shaking so please be careful.
Technical Note
19/19
BD5468GUL
www.rohm.com 2010.09 - Rev.
A
© 2010 ROHM Co., Ltd. All rights reserved.
●Ordering part number
B D 5 4 6 8 G U L - E 2
Part No. Part No. Package
GUL :VCSP50L1 Packaging and forming specific ation
E2: Embossed tape and reel
(Unit : mm)
VCSP50L1
(BD5468GUL)
S
0.06 S
A
B
BA
0.05
1PIN MARK
3
0.35±0.05
9-φ0.25±0.05
1.70±0.05
2
(φ0.15)INDEX POST
C
1
0.35±0.05
B
0.55MAX
1.70±0.05
A
0.1±0.05
P=0.5×2
P=0.5×2
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed 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
3000pcs
E2
()
Direction of feed
Reel 1pin
Datasheet
Datasheet
Notice - GE Rev.002
© 2014 ROHM Co., Ltd. All rights reserved.
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
intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport
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
CLASSⅢ CLASSⅢ CLASSⅡb CLASSⅢ
CLASSⅣ CLASSⅢ
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
Datasheet
Datasheet
Notice - GE Rev.002
© 2014 ROHM Co., Ltd. All rights reserved.
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.
DatasheetDatasheet
Notice – WE Rev.001
© 2014 ROHM Co., Ltd. All rights reserved.
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 by you or third parties resulting from inaccuracy or errors of or
concerning such information.
