ICs for Audio Common Use AN7170 18W Audio Power Amplifier Circuit ■ Overview Unit : mm 15.0±0.3 3.6±0.2 11 10 9 8 7 6 5 4 3 2 1 2.7±0.4 0.7±0.1 30.0±0.3 24.0±0.3 1.26±0.25 3.5±0.25 5.5±0.3 7.5±0.3 0.1 0.35 +– 0.05 overcurrent, temperature, load short) • Incorporating automatic operating point stabilizer circuit • Low distortion, low 1/f noise 4.7±0.6 1.0±0.2 1.8R 0.95±0.25 ■ Features • High output power : PO =18W • High surge voltage : VCC (surge) = 60V (max.) • Wide supply voltage range : VCC (opr) = 8 ~ 35V • Incorporating protection circuits (overvoltage, 5.85±0.25 2.54 The AN7170 is an integrated circuit manufactured by high voltage process designed for power amplifier of bus, track amplifier. Wide operating supply voltage range with output of 18W at 26.4V. It can be widely used for bus, truck amp., car stereo, home entertainment stereo set and TV sound multiplex output. 0.35±0.25 11-Lead SIP Package (HSIP011-P-0000) ■ Block Diagram VCC 9 Ripple Filter 11 Temperature Compensation Surge Over Current Protection 4 7 Input Circuit Driver Circuit 6 5 Output Circuit GND 8 (Input) 3 GND (Output) 1 ICs for Audio Common Use AN7170 ■ Absolute Maximum Ratings (Ta= 25˚C) Parameter Symbol Rating Unit VCC 35 V Supply Voltage (at no signal) VCC 30 V VCC (surge) 60 V Supply Current ICC 4 A Power Dissipation Note 2) PD 31.25 W Operating Ambient Temperature Topr – 30 ~ + 75 ˚C Storage Temperature Tstg – 55 ~ + 150 ˚C Supply Voltage (at operation) Peak Supply Voltage Note 1) Note 1) Pulse Voltage application t = 0.2s Note 2) Ta = 25˚C ( θj – c = 4˚C/W) ■ Electrical Characteristics (VCC = 26.4V, f = 1kHz, Ta= 25˚C) Parameter Symbol Condition min. typ. max. Unit (RL= 8Ω) Quiescent Circuit Current ICQ Vi= 0mV 40 75 160 mA Voltage Gain GV Vi= 3mV 51 53 55 dB THD= 1% 8 9.5 No Distortion Maximum Output PO Total Harmonic Distortion THD THD= 10% 10.5 W 12 W Vi= 3mV 0.1 0.7 % 1.5 mV Output Noise Voltage Vno Rg= 10kΩ, DIN A Filter 0.7 Ripple Rejection Ratio RR Vi= 0mV, Rg= 0Ω 40 dB Input Impedance Zi 30 kΩ THD= 1% 13 W THD= 10% 18 W (RL= 4Ω) No Distortion Maximum Output PO ■ Pin Descriptions Pin No. Pin Name Pin No. Pin Name 1 Output 7 Input 2 NC 8 GND (Input) 3 GND (Output) 9 Ripple Filter 4 Bootstrap 10 NC 5 Phase Compensation 11 VCC 6 Negative Feedback ICs for Audio Common Use AN7170 PD – Ta 24 THD = 10% RL = 4Ω RL = 8Ω 5% 20 (2) 5% 16 10 % Output Power PO (W) 1% 24 16 100 Output Power PO (W), Power Dissipation PD (W), Total Harmonic Distortion THD (%) (1) Tc = Ta (θj – c = 4˚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 (1) heat sink (not lacquered) 32 Power Dissipation PD (W) PO, PD, THD – Vi PO – VCC 40 12 1% 8 (3) 8 4 VCC = 24V, RL = 4Ω f = 1kHz, GV = 53dB 30 PO 10 PD 3 1 0.3 THD 0.1 0.03 40 80 120 160 0 200 0 Ambient Temperature Ta (˚C) 12 16 PO PO 1 1 THD 0.3 0.3 0.1 0.1 0.03 0.03 THD 0.1 0.3 1 3 10 30 0.01 100 Input Voltage Vi (mV) PD – PO f = 1kHz RL = 4Ω RL = 8Ω Power Dissipation PD (W) 12 VCC = 30V 10 28V 8 24V 6 30V 28V 24V 22V 16V 4 2 0 16V 0 4 22V 8 12 16 20 24 Output Voltage PO (W) 4 GV = 53dB GV = 46dB 0.01 0.1 32 0.3 28 32 1 3 10 30 100 Input Voltage Vi (mV) GV, THD – f VCC = 24V RL = 8Ω PO = 2W VCC = 24V RL = 4Ω PO = 4W GV = 53dB 2 0 GV –2 –4 GV 0 –2 –4 –6 2.0 1.5 1.5 1.0 1.0 0.5 0 10 0.5 THD 100 1k THD 10k Frequency f (Hz) 16 14 Total Harmonic Distortion THD (%), Voltage Gain GV (dB) 3 PD Total Harmonic Distortion THD (%) Output Power PO (W), Power Dissipation PD (W) 10 10 0.01 100 30 GV = 53dB GV = 46dB 3 28 GV, THD – f VCC = 24V, RL = 8Ω f = 1kHz 30 24 Supply Voltage VCC (V) PO, PD, THD – Vi 100 20 100k 10 100 1k 10k Frequency f (Hz) 0 100k Total Harmonic Distortion THD (%) 0 Voltage Gain GV (dB) 0 ICs for Audio Common Use AN7170 ■ Application Circuit + – VCC = 26.4V + 100µF – 9 1000µF 11 150Ω Input 7 47µF + – 4 0.033µF 1500pF AN7170 150Ω 8 + 1 – 1000µF 0.1µF 6 5 3 *2 2.2Ω *1 + – *1. *2. 4Ω or 8Ω 100µF 82Ω at GV = 46dB, R = 0 at GV = 53dB 12pF at GV = 46dB, 8pF at GV = 53dB (C = 0 is allowable for frequency characteristics adjustment in high band) ■ Printed Circuit Board Layout Scale : 1/1 VCC + – 1000µF 1 150Ω IN OUT 0.033µF + – 100µF 1500pF + – 100µF + – 82Ω 150Ω µF 00 10 + – 11 12pF 2.2Ω 47µF 0.1µF AN7170