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| ICs for Audio Common Use AN7135 Dual 7.5W Low Frequency Power Amplifier Circuit s Overview The AN7135 is a power amplifier circuit of 7.5W (15.0V, 3) output. It can provide stereo operation since two amplifiers are incorporated in a chip. Static circuit current is very smaller than conventional IC for power amplifier, and various protective circuits are incorporated, thus providing high reliability. For its feature of very small static circuit current, it is best suitable for dry cell operating sets (e.g. radio cassette recorder). It requires smaller number of external components because it has little distortion and low noise and can support the stand-by condition. 5.90.25 7.70.3 7.80.25 o 3.6 12 Unit : mm 29.960.3 28.00.3 20.00.2 0.6 R1.8 s Features * Small static circuit current * Stand-by condition supported * Good oscillation stability * Little unwanted radiation to RF portion of AM/FM * Little distortion * Low noise * Small shock noise at power ON/OFF, stand-by ON/OFF * Fewer external components 1 1.20.1 0.35 - 0.05 3.50.3 12 11 8 7 + 0.1 Fin-attached 12-lead SIP package (HSIP012-P-0000A) s Block Diagram VCC 3 10 2 Input Circuit Drive Circuit SEPP Output Circuit 1 Bias Circuit Over Temperature Protection Crossover Distortion 6 5 Input Circuit Drive Circuit SEPP Output Circuit 4 GND (Input) 9 GND (Output) 2.54 0.60.1 29.60.3 AN7135 s Pin Name Pin No. 1 2 3 4 5 6 Input Ch.1 Ripple filter/Stand-by Controller GND (Input) Input Ch.2 Negative Feedback Ch.2 Pin Name Negative Feedback Ch.1 Pin No. 7 8 9 10 11 12 Output Ch.2 Boot-strap Ch.2 GND (Output) VCC Boot-strap Ch.1 Output Ch.1 Pin Name ICs for Audio Common Use s Absolute Maximum Ratings (Ta= 25C) Parameter Supply Voltage Supply Current Power Dissipation Note 1) Operating Ambient Temperature Storage Temperature Note) j-c = 2C/W Symbol VCC ICC PD Topr Tstg Rating 24 4 62.5 - 30 ~ + 75 - 55 ~ + 150 Unit V A W C C s Recommended Operating Range (Ta= 25C) Parameter Operating Supply Voltage Range Note) 24V at no signals Symbol VCC Range 5.5V ~ 18.0V s Electrical Characteristics (VCC = 15V, fIN = 1kHz, RL = 3, Both channel drive, Ta= 25C 2C) Parameter Quiescent Current Output End Noise Voltage Note 1) Voltage Gain Total Harmonics Distortion Max. Output Power Channel Balance Ripple Rejection Ratio Note 1) Input Offset Voltage Stand-by Current Symbol ICQ VNO GV THD PO CB RR VIN (O.S) ISTB VIN= 0mV VIN= 0mV, Rg= 10k VIN= 3mV VIN= 3mV THD= 10% VIN= 3mV VCC (ripple)= 280mV, f (ripple)= 120Hz Rg= 0 Sine wave Input pin open Pin3 open 7.0 -1 45 42.5 Condition min. typ. 14 0.25 44.5 0.40 7.5 0 50 10 30 30 +1 max. 20 0.50 46.5 0.75 Unit mA mV dB % W dB dB mV A Note 1) Measured through 15Hz to 30kHz (12dB/OCT) filter ICs for Audio Common Use s Application Circuit AN7135 VCC (15V) R.F & STB + VCC 10 1000F 3 390 VSTB IN1 2 100F + 30k NF1 + 100F 10k 1 150 BS1 11 + + 12 OUT1 - 30k 0.1F 2.2 3 (20W) 47F 1000F + VO 1 BS2 8 + 5 IN2 + 7 6 NF2 100F 150 30k OUT2 - 0.1F 2.2 3 (20W) 47F 1000F + VO2 4 9 (Standard Conditions) VCC = 15V RL = 3 fIN = 1kHz VIN = 10mV or 3mV Rg = 600 VSTB = 5.0V Both Ch. Drive With heat sink Tr for stand-by SW NPN*** 2SC828A PNP*** 2SA564A PD - Ta 80 PD at Ta = 25C (a) 62.50W ( j-c = 2.0C/W) Infinity heat sink (b) 20.83W ( f = 4.0C/W) Heat sink area : 100cm2 x 3mmAl (Black lacquer coated) 200cm2 x 2mmAl (Lacquered) (c) 15.63W ( f = 6.0C/W) Heat sink area : 100cm2 x 2mmAl (Not lacquered) (d) 3.0W at Ta = 30C ( j-a = 40C/W) Without heat sink 70 (62.50) 60 Power Dissipation PD (W) (a) 50 40 30 (20.83) 20 (15.63) 10 (3.0) 0 (b) (c) (d) 0 60 80 100 120 20 40 (30) Ambient Temperature Ta (C) 140 160 AN7135 ICQ - VCC 20 20 freq. = 1kHz THD = 10% ICs for Audio Common Use PO - VCC 52 50 48 Voltage Gain GV (dB) 46 44 42 THD 40 38 VSTB = 5V Ch. 1 Ch. 2 0.4 0.2 0 Gain VCC = 15V RL = 3 VIN = 10mVrms Both ch. drive 1.0 0.8 0.6 Total Harmonics Distortion THD (%) GV, THD - fIN 16 Quiescent Current ImCQ (mA) No RRF 12 Output Power PO (W) 16 12 RL = 3 8 RL = 4 8 VSTB = 6V 4 VSTB = 4V VSTB = 3V 0 0 4 8 12 16 20 4 RL = 8 0 36 34 20 32 10 100 0 4 8 12 16 1k 10k 100k Supply Voltage VCC (V) Supply Voltage VCC (V) Input Frequency fIN (Hz) PO, THD - VIN 100 30 10 Output Power PO (W) 3 1 0.3 0.1 0.03 0.01 0.1 VCC = 15V RL = 3 Both ch. drive 1kHz 10kHz 100Hz 100 30 10 3 1 0.3 0.1 47 Total Harmonics Distortion THD (%) 46 GV, THD - VCC VC = 5V Gv Voltage gain GV (dB) 45 44 43 42 41 40 THD 0 VC = 5V 0 4 8 12 16 7 6 5 4 3 2 1 0 20 0 10 100 VIN = 3V fIN = 1kHz 9 RL = 3 Both ch. drive 8 10 1.0 Vno - Rg VCC = 15V DIN/Audio With filter Total Harmonics Distortion THD (%) 0.8 Noise Voltage Vno (mV) 0.6 0.4 0.2 0.03 0.01 100 0.3 1 3 10 30 1k 10k 100k Input Voltage VIN (mV) Supply Voltage VCC (V) Resistance Rg () RR - fripple 100 VCC = 15V VR = 280mVrms Rg = 0 DIN/Audio With filter 100 RR - Vripple 80 VCC = 15V fR = 120Hz Rg = 0 DIN/Audio With filter 70 Ripple Suppression Ratio RR (dB) 60 50 40 30 20 10 RR - VCC VR = 280mVrms fR = 120Hz Rg = 0 DIN/Audio With filter Ripple Suppression Ratio RR (dB) 80 Ripple Suppression Ratio RR (dB) 80 60 60 40 CR- F = 100F (same for 47F) 20 40 20 0 10 20 30 100 200 300 500 1k 0 0.1 0.2 0.3 0.5 1 3 5 10 0 0 4 8 12 16 20 24 28 32 Ripple Frequency fripple (Hz) Ripple Voltage Vripple (V) Supply Voltage VCC (V) |
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