ICs for Audio Common Use AN7149N Dual 5.3W Audio Power Amplifier Circuit ■ Overview Unit : mm The AN7149N is an integrated circuit designed for power amplifier of 5.3W (12.0V, 3Ω) output. Stereo operation is enabled due to incorporating two amps. on one chip. It makes high reliability by smaller quiescent current compared with power amp. current and protectors built in. As quiescent circuit current is very few, it is most suitably used for battery operated set such as radio cassette recorder. Furthermore, low distortion and low noise are realized and external components are very few. 12-pin SIL package enabled compact and high-densely mounted set. 5.9±0.25 7.7±0.3 7.8±0.25 ø 3.6 1.2±0.1 Pin No. Pin Name Pin No. N.F.B Ch.1 7 Output Ch.2 2 Input Ch.1 8 Bootstrap Ch.2 3 Ripple Filter 9 GND (Output) 4 GND (Input) 10 VCC 5 Input Ch.2 11 Bootstrap Ch.1 6 N.F.B Ch.2 12 Output Ch.1 ■ Block Diagram 1 11 Driver Circuit Output Circuit 12 Over Current Over Temperature Protection 3 5 Input Circuit 6 Pin Name 1 Input Circuit 29.6±0.3 12-Lead SIP Package with Fin (HSIP012-P-0000A) ■ Pin Descriptions 2 3.5±0.3 1 ■ Features • Low quiescent current • High operation stability • Low radiation • Low distortion • Low noise • Low shock noise from power ON/OFF operation • Fewer external components + 0.1 0.35 – 0.05 2.54 0.6 R1.8 0.6±0.1 29.96±0.3 28.0±0.3 20.0±0.2 12 Driver Circuit 4 GND (Input) Output Circuit 9 10 VCC 7 8 GND (Output) ICs for Audio Common Use AN7149N ■ Absolute Maximum Ratings (Ta= 25˚C) Symbol Rating Unit Supply Voltage Parameter VCC 24 V Supply Current ICC 4 A Power Dissipation PD 41.7 W Operating Ambient Temperature Topr – 30 ~ + 75 ˚C Storage Temperature Tstg – 55 ~ + 150 ˚C ■ Electrical Characteristics (VCC = 12V, RC = 3Ω, f = 1kHz, Ta = 25˚C) Parameter Symbol Condition Quiescent Circuit Current ICQ Vi = 0mV Voltage Gain GV PO = 1.0W Total Harmonic Distortion THD Output Noise Voltage Vno Channel Balance CB PO = 0.5W Ripple Rejection Ratio RR PO = 0.5W PD – Ta 50 (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 Power Dissipation PD (W) (1) 30 20 (2) 10 (3) (4) 0 0 40 80 120 Ambient Temperature Ta (˚C) 4.7 160 typ. max. Unit 13 19 mA 49.5 51.5 dB 0.2 0.5 % 5.3 4.3 THD = 10%, RL = 4Ω THD = 10%, VCC = 9V, RL = 3Ω Rg = 10kΩ, f = 15Hz ~ 30kHz, 12dB/OCT PO 40 47.5 PO = 1.0W, f = 1kHz THD = 10%, RL = 3Ω Maximum Output Power min. W 2.9 40 0.5 1.0 mV 0 1.0 dB 45 dB ICs for Audio Common Use AN7149N GV, THD – f PO – VCC RL = 4Ω 8 RL = 6Ω 48 VCC = 12V RL = 3Ω Vin = 3mV 46 1.0 45 44 6 0.8 0.6 4 0.4 2 0 THD 0 4 8 12 16 10 20 10 10 47 100 0.2 1k 10k 100k f = 10kHz 0.1 0.1 PO f = 1kHz 0.01 0.1 1 10 100 Input Voltage Vin (mV) Vno – Rg ■ Application Circuit VCC = 12V RL = 3Ω VCC – + 1000µF 10 0.1µF 1 100µF FLAT 11 + – 2 0.6 + 47µF – 12 Input Ch.1 2.2Ω 1000µF + – + – AN7149N 0.4 DIN/AUDIO 7 5 Input Ch.2 0.2 47µF – 1000µF + 0 10 100 1k 10k 100k 100µF Input Resistance Rg (Ω) 6 + 8 4 – 0.1µF 9 2.2Ω Printed Circuit Board Layout AN7149N Output2 – + 1000µF Input2 GND – + 100µF 100µF – + 100µF 2.2 Ω – + 47µF Input1 1 – + Output1 1000µF µF 0.1 0.1µF + – 2.2Ω Output Noise Voltage Vno (mV) 3 0.8 1000µF – + 1.0 VCC + – + – 47µF 12 1 f = 1kHz Frequency f (Hz) Supply Voltage VCC (V) THD f = 100Hz 1 1000µF GND Total Harmonic Distortion THD (%) 10 VCC = 12V RL = 3Ω GV Output Power PO (W) RL = 3Ω 49 Total Harmonic Distortion THD (%) RL = 2Ω 12 Voltage Gain GV (dB) THD = 10% f = 1kHz 14 Maximum Output PO (W) PO, THD – Vin 50 16