TA7280,81P TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA7280P,TA7281P 5.8W Dual Audio Power Amplifier. 22W BTL Audio Power Amplifier. The TA7280P, TA7281P are dual audio power amplifier for consumer applications. It is designed for high power, low distortion and low noise. It also contains various kind of protectors. It is suitable for car-audio power amplifier with high performance. The kinds of pin configuration are available: Normal (TA7280P) and reverse (TA7281P) for easier layout design of PC-board when used in BTL-stereo application. Features * Weight: 4.04g (typ.) High power : POUT (1) = 22W (typ.) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4, BTL) POUT (2) = 19W (typ.) (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4, BTL) POUT (3) = 15W (typ.) (VCC = 13.2V, f = 1kHz, THD = 1%, RL = 4, BTL) POUT (4) = 5.8W (typ.) / ch (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4, DUAL) * Low distortion : THD (1) = 0.03% (typ.) (VCC = 13.2V, f = 1kHz, POUT = 4W, RL = 4, GV = 40dB, BTL) THD (2) = 0.06% (typ.) (VCC = 13.2V, f = 1kHz, POUT = 1W, RL = 4, GV = 52dB, DUAL) * Low noise : VNO (1) = 0.14mVrms (typ.) (VCC = 13.2V, RL = 4, GV = 40dB, Rg = 0, DIN noise: DIN45405, BTL) VNO (2) = 0.7mVrms (typ.) (VCC = 13.2V, RL = 4, GV = 52dB, Rg = 10k, BW = 20Hz~20kHz, DUAL) * Protector circuit : Thermal shout down, Over voltage protection, Out-VCC short, Out-GND short and Out-Out short protection. * Operating supply voltage range : VCC (opr) = 9~18V 1 2002-10-30 TA7280,81P Block Diagram DUAL Application Information(this explanatory terminal number is for TA7280P) 1. Voltage gain adjustment (1) Dual amplifier The voltage gain GV is determined by R1, R2 and Rf in (Fig. 1). R + R1 + R2 G V = 20log f (dB) R f + R1 In case of Rf = 0 The voltage gain is set as follows: GV = 52dB (typ.) (2) BTL amplifier The recommended BTL connection amplifier shown in (Fig. 2) . AMP. 1 is noninverting amplifier and AMP. 2 is invert one. The output voltage is divided by resistors R3 and R4. The divided voltage is applied to inverting input of amp. 2. R3 and R4 are determined in the following equation. R3 + R 4 R + R1 + R2 = 20log f (dB) R3 R f + R1 GV in Dual mode 2 2002-10-30 TA7280,81P The voltage gain in this circuit is 6dB higher than that in Dual mode. R + R1 + R2 G V = 20log f (dB) R f + R1 In case of Rf = 0 GV = 52+6 = 58 (dB) In case of Rf = 430 GV = 34+6 = 40 (dB) Each voltage gain can be set as shown above. 2. Muting Audio muting can be accomplished by connecting pin(6) (ripple filter) to GND as shown in (Fig. 3). Then, the bias circuits are cut off. However, caution must be exercised to the following items. (1) The recovery time from the muting operation is determined by the capacities of the ripple filter capacitor between pin(6) and GND, and of the capacitor for NF. (2) As this muting system is operated by the short-circuit of ripple filter: C5, the ripple rejection ratio becomes worse in the muting condition. At mute on, some pop noise of breaking the bias are produced. The output waveform at muting on / off during BTL, are shown in (Fig.4). (Provided VCC = 13.2V, RL = 4, nonsignal.) 50dB or more can be obtained for muting amount. 3 2002-10-30 TA7280,81P 3. Measures against oscillation. C7, C8, C9, C12: The capacitor of polyester film having small variation of the temperature characteristics is recommended as the capacitor for oscillation prevention. C12: Reduces the gain in the high range frequency (150kHz or over) and increases the oscillation allowance. R5: Increases the oscillation allowance at output cripping of the low range frequency (100Hz or less). Since the oscillation allowance varies according to the following item, carry out the temperature test to confirm the oscillation allowance. (1) Gain to be used (GV setting). (2) Capacity of capacitor (3) Kinds of capacitor (4) Layout of printed board It is recommended to use the capacitor having the capacity exceeding the oscilltation stopping value. At using with the voltage gain GV lowered or with the high range frequency and the oscillation becomes liable to be produced. Therefore, application with GV = 40dB or over is advisable. Especially for using with the gain lowered in dual operation, insert 1000pF between NF (pin(2) and pin(4)) and GND. This capacitor reduces the gain of the high range frequency and is effective for oscillation prevention. 4. Output waveform at power supply on / off (reference) BTL and dual amplifier DC output waveforms in the condition of VCC = 13.2V, RL = 4 at non-signal (input short) are shown in (Fig. 5) and (Fig. 6). DUAL 4 2002-10-30 TA7280,81P The popping time at power supply on / off varies according to the rise and fall times. The condition in which the power supply is rapidly and repeatedly mode on / off, that is, the condition in which the charge is made on the external capacitor of IC is different from the conditions shown in (Fig. 5) and (Fig. 6) . Maximum Ratings (Ta = 25C) Characteristic Symbol Rating Unit VCC (surge) 45 V DC supply voltage VCC (DC) 25 V Operating supply voltage VCC (opr) 18 V Output current (peak) Peak supply voltage (0.2 s) IO (peak) 4.5 A Power dissipation PD 25 W Operating temperature Topr -30~85 C Storage temperature Tstg -55~150 C Electrical Characteristics (unless otherwise specified, VCC = 13.2V, RL = 4, Rg = 600, f = 1kHz, Ta = 25C) Characteristic ICCQ 2 POUT (1) Typ. Max. Unit VIN = 0 80 145 mA 1 THD = 10%, VCC = 14.4V 22 POUT (2) 1 THD = 10% 16 19 POUT (3) 1 THD = 1% 12 15 THD (1) 1 POUT = 4W, GV = 40dB 0.03 0.25 % Output offset voltage VOFF 1 VIN = 0 0 0.35 V Voltage gain GV (1) 1 VOUT = 0.775Vrms (0dBm) 40 dB Output noise voltage VNO (1) 1 Rg = 0 DIN45405 noise filter 0.14 mVrms Ripple rejection ratio R. R. (1) 1 fripple = 100Hz Vripple = 0.775Vrms (0dBm) -52 -40 dB Output power POUT (4) 2 THD = 10% 5 5.8 W Total harmonic distortion THD (2) 2 POUT = 1W 0.06 0.30 % Output power BTL connection mode Test Circuit Min. Quiescent current Dual mode Symbol Total harmonic distortion Test Condition W Voltage gain GV (2) 2 VOUT = 0.775Vrms (0dBm) 50 52 54 dB Voltage gain ratio GV 2 VOUT = 0.775Vrms (0dBm) -1 0 1 dB Output noise voltage VNO (2) 2 Rg = 10k BW = 20Hz~20kHz 0.7 1.5 mVrms Ripple rejection ratio R. R. (2) 2 fripple = 100Hz Vripple = 0.775Vrms (0dBm) -52 -40 dB Cross talk C. T. 2 VOUT = 0.775Vrms (0dBm) -57 dB Input resistance RIN 2 f = 1kHz 33 k 5 2002-10-30 TA7280,81P Typ. DC Voltage Of Each Terminal (VCC = 13.2V, Ta = 25C, dual mode test circuit ) Terminal No. DC voltage (V) 1 2 3 4 5 6 7 8 9 10 11 12 TA7280P 1.5 1.5 GND 1.5 1.5 6.4 6.4 12.3 GND VCC 12.3 6.4 TA7281P 6.4 12.3 VCC GND 12.3 6.4 6.4 1.5 1.5 GND 1.5 1.5 Test Circuit / Application Circuit TA7280P (1) BTL (2) DUAL 6 2002-10-30 TA7280,81P TA7281P (1) BTL (2) DUAL 7 2002-10-30 TA7280,81P 8 2002-10-30 TA7280,81P 9 2002-10-30 TA7280,81P 10 2002-10-30 TA7280,81P 11 2002-10-30 TA7280,81P 12 2002-10-30 TA7280,81P Package Dimensions Weight: 4.04g (typ.) 13 2002-10-30 TA7280,81P RESTRICTIONS ON PRODUCT USE 000707EBA * TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * * * The products described in this document are subject to the foreign exchange and foreign trade laws. The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. The information contained herein is subject to change without notice. 14 2002-10-30