AN7148

ICs for Audio Common Use AN7148 Dual 2.1W Audio Power Amplifier Circuit s Overview The AN7148 is an integrated circuit designed for power amplifier of 2.1W (9V, 4 Ω) output. Stereo operation is enabled due to incorporating two amplifiers on one chip. It is most suitably used for battery operated set such as radio cassette recorder because quiescent circuit current is small comparing to current power amplifier. Low distortion and low noise are realized and external components are very few. 12-pin SIL package has realized compact and high density mounting of a set. 5.9±0.25 7.7±0.3 7.8±0.25 ø 3.6 12 Unit : mm 29.96±0.3 28.0±0.3 20.0±0.2 0.6±0.1 R1.8 0.6 s Features • Low quiescent current • High operation stability • Low radiation • Low distortion • Low noise • Low shock noise from power ON/OFF operation • Fewer external components s Pin Descriptions Pin No. 1 2 3 4 5 6 Pin Name N.F.B Ch.1 Input Ch.1 Ripple Filter GND (Input) Input Ch.2 N.F.B Ch.2 1 + 0.1 0.35 – 0.05 2.54 12-Lead SIP Package with Fin (HSIP012-P-0000A) 1.2±0.1 Pin No. 7 8 9 10 11 12 Pin Name Output Ch.2 Bootstrap Ch.2 GND (Output) VCC Bootstrap Ch.1 Output Ch.1 s Block Diagram 1 Input Circuit Ch.1 3 Ch.2 5 Input Circuit 6 4 GND (Input) Driver Circuit 9 GND (Output) Output Circuit 8 7 Over Temperature Protection 10 VCC Driver Circuit 11 Output Circuit 2 12 3.5±0.3 29.6±0.3 AN7148 s Absolute Maximum Ratings (Ta= 25˚C) Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature * R θ j – c = 3˚C/W Symbol VCC ICC PD * Topr Tstg ICs for Audio Common Use Rating 24 3.5 41.7 – 30 ~ + 75 – 55 ~ + 150 Unit V A W ˚C ˚C s Electrical Characteristics (Ta = 25˚C) Parameter Quiescent Circuit Current Output Noise Voltage Voltage Gain (Gain) Total Harmonic Distortion Maximum Output Power (4Ω) Channel Balance Maximum Output Power (8Ω) Maximum Output Power (3Ω) Symbol ICQ Vno * GV THD PO (max.) CB PO (max.) 8 PO (max.) 3 Condition VCC = 9V, RL = 4Ω, Vin = 0mV VCC = 9V, RL = 4Ω, Vin = 0mV, Rg = 10kΩ VCC = 9V, RL = 4Ω, Vin = 3mV, f = 1kHz VCC = 9V, RL = 4Ω, Vin = 3mV, f = 1kHz VCC = 9V, RL = 4Ω, THD = 10%, f = 1kHz VCC = 9V, RL = 4Ω, Vin = 3mV, f = 1kHz VCC = 9V, RL = 8Ω, THD = 10%, f = 1kHz VCC = 9V, RL = 3Ω, THD = 10%, f = 1kHz min. typ. 13 0.25 42.5 44.5 0.20 1.75 2.10 0 1.25 2.6 1 max. 19 0.50 46.5 0.75 Unit mA mV dB % W dB W W Note) Operating Supply Voltage Range : VCC (opr.) = 6 ~ 18V * Filter with band width of 15Hz ~ 30kHz (12dB/oct) should be used for Vno measurement. PD – Ta 50 45 40 Power Dissipation PD (W) 35 30 25 20 17.9W 15 10 5 0 0 3.0W 25 50 13.9W (3) (4) 75 100 125 150 (2) (1) 41.7W (1) Tc = Ta (θj– c = 3˚C/W) (2) With a 100cm2 × 3mm Al heat sink (black color coated) or a 200cm2 × 2mm Al heat sink (not lacquered) (3) With a 100cm2 × 2mm Al heat sink (not lacquered) (4) Without heat sink Ambient Temperature Ta (˚C) ICs for Audio Common Use AN7148 PO, THD – Vin 10 100 Total Harmonic Distortion THD (%) Voltage Gain GV (dB) VCC = 9V RL = 4Ω f = 1kHz 1 Output Power PO (W) 10 45 GV 44 43 Total Harmonic Distortion THD (%) 42 41 1.0 0.8 0.6 0.4 VCC = 9V RL = 4Ω Vin = 3mV 0.001 0.1 1 10 0.01 100 10 100 THD 0.2 10k 0 100k GV, ICQ, THD – VCC Voltage Gain GV (dB) 46 GV 45 44 f = 1kHz RL = 4Ω GV, THD – f Quiescent Circuit Current ICQ (mA) Total Harmonic Distortion THD (%) 0.1 THD 0.8 15 ICQ 10 THD 5 0 0.2 0 24 0.4 0.6 1 0.01 PO 0.1 0 4 8 12 16 20 1k Supply Voltage VCC (V) Input Voltage Vin (mV) Frequency f (Hz) PO – VCC 20 18 16 Output Power PO (W) 14 12 10 8 6 4 2 0 0 4 8 12 16 20 24 RL = 4Ω RL = 3Ω THD = 10% f = 1kHz Output Noise Voltage Vno (mV) 1.6 1.4 1.2 1.0 0.8 0.6 VCC = 9V RL = 4Ω Vno – Rg FLAT 0.4 DIN/Audio 0.2 0 0.1k 1k 10k 100k 1000k Supply Voltage VCC (V) Input Resistance Rg (Ω) s Application Circuit VCC – + 1000µF 3 10 11 + – 1000µF 0.1µF + – 100µF + – 1 47µF 2 12 2.2Ω 1000µF + – Input Ch.1 AN7148 5 Input Ch.2 6 100µF + – 7 47µF – 8 4 9 + + – 1000µF 0.1µF 2.2Ω AN7148 s Printed Circuit Board Layout ICs for Audio Common Use AN7148 Output2 – + Input2 + – – + Input1 1 100µF – + 100µF 0.1µF 1000µF 2.2Ω – + 1000µF Output1 0.1 µF GND 100µF 2.2 Ω +– 47µF 12 + – 1000µF VCC –+ 47µF GND