ICs for Audio Common Use AN7174K Dual BTL 14W Audio Power Amplifier Circuit ■ Overview The AN7174K is an integrated circuit for 14W (13.2V, 4Ω) output power amplifier circuit. Two BTL amplifiers are built-in on a single chip and stereo operation is possible. It is highly reliable due to protection circuits built-in. The built-in stand-by circuit makes it possible to switch the circuit ON/OFF with a charge mode to power supply pin. ø 3.6 5.9±0.25 7.7±0.3 Unit : mm 7.8±0.5 6.33±0.5 29.6±0.3 0.6±0.2 1.778 R1.8 0.6 ■ Features • High output power (BTL 14W × 2) • Stand-by circuit built-in • Protection circuits built-in (temperature, 20.0±0.25 29.96±0.3 28.0±0.3 16 1 1.2±0.1 12.5±0.3 (14.1) 2.66 (4.06) 3.5±0.3 1.45±0.25 1.8±0.25 (1.2) 1.45±0.25 16-Lead ZIP Package with Fin (EZIP016-P-0660) ■ Block Diagram 7 VCC 1 8 Input Circuit Driver Circuit Output Circuit 13 4 3 6 Input Circuit Driver Circuit 5 Stand – by Circuit 12 Input Circuit Output Circuit GND 2 Protection Circuit Driver Circuit Output Circuit 16 15 GND Input Circuit GND 10 11 9 Driver Circuit Output Circuit 14 2.54±0.8 2.8±0.3 (0.25) overvoltage, VOUT– GND short, Load short, VOUT–VCC short) • Low shock noise from power ON/OFF operation • Fewer external parts • Highly stable operation ICs for Audio Common Use AN7174K ■ Absolute Maximum Ratings (Ta= 25˚C) Parameter Symbol Rating Unit VCC 24 V VCC (surge) 50 V ICC 6 A Supply Voltage Note 1) Peak Supply Voltage Note 2) Supply Current PD 62.5 W Operating Ambient Temperature Topr – 30 ~ + 75 ˚C Storage Temperature Tstg – 55 ~ + 150 ˚C Power Dissipation Note 3) Note 1) No Signal Note 2) Time= 0.2s Note 3) Rθj– c= 2˚C/W ■ Recommended Operating Range (Ta = 25˚C) Parameter Symbol Range Operating Supply Voltage Range VCC 8V ~ 18V ■ Electrical Characteristics (VCC = 13.2V, RL= 4Ω, f = 1kHz, Ta = 25˚C) Parameter Symbol Quiescent Circuit Current Output Noise Voltage Vin= 0mV GV Vin= 5mV THD Vin= 5mV Voltage Gain Total Harmonic Distortion Condition ICQ Vno * typ. max. 120 Vin= 0mV, Rg= 10kΩ PO Maximum Output Power (4Ω) min. 50.5 THD= 10% Unit 200 mA 0.6 1.5 mV 52.5 54.5 dB 0.2 0.75 % 9 12.5 W 35 40 dB Ripple Rejection Ratio RR * Output Offset Voltage VO (offset) Vin= 0mV –300 0 300 mV CB Vin= 5mV –1 0 1 dB Channel Balance Rg= 0Ω, Vin= 0mV, Ripple= 300mV, 120Hz Total Harmonic Distortion THD Vin= 5mV, 100Hz 0.26 Total Harmonic Distortion THD Vin= 5mV, 10kHz 0.45 % Frequency Characteristics fCH Vin= 5mV, –3dB down 22 kHz Frequency Characteristics fCL Vin= 5mV, –3dB down 21 Hz Stand-by Pin ON 21 µA Vin= 5mV, Rg= 10kΩ 61 dB Quiescent Circuit Current at Stand-by Pin ICQ (STBY–ON) CT Crosstalk % * With 15Hz ~ 30kHz (12dB/oct) filter ■ Characteristics Curve PO, THD – Vin 8 PO 1 1 THD 0.1 4 0.1 52 GV 50 48 46 1.0 VCC = 13.2V 0.8 RL = 4Ω PO = 1W 0.6 0.4 THD 0.2 0 0 4 8 12 16 Supply Voltage VCC (V) 20 0.01 0.1 1 10 Input Voltage Vin (mV) 0.01 100 10 100 1k 10k Frequency f (Hz) 0 100k Total Harmonic Distortion THD (%) 12 Voltage Gain GV (dB) 10 10 Output Power PO (W) Maximum Output PO (W) VCC = 13.2V RL = 4Ω f = 1kHz f = 1kHz THD = 10% RL = 4Ω 16 GV, THD – f 54 100 100 Total Harmonic Distortion THD (%) PO – VCC 20 ICs for Audio Common Use AN7174K GV, THD – VCC ICQ – VCC 10 f = 1kHz RL = 4Ω Vin = 3mV 60 9 7 48 6 46 5 44 4 42 3 40 2 38 1 160 (1) 50 Power Dissipation PD (W) 50 Quiescent Circuit Current ICQ (mA) 8 62.5W 55 Total Harmonic Distortion THD (%) GV 52 Voltage Gain GV (dB) PD – Ta 65 200 120 80 45 40 35 30 25 20 15 40 (1) Tc – Ta (Rθj – c = 2˚C/W) (2) With a 100cm2 × 3 mm Al (Black color coated) or a heat sink (not lacquered) (3) With a 100cm2 × 2 mm Al (4) Witout heat sink 20.8W (2) 15.6W (3) 10 3 4 5 6 7 8 9 10 (4) 5 THD 36 0 0 11 4 8 Supply Voltage VCC (V) 12 16 0 20 3.0W 0 25 Supply Voltage VCC (V) 50 75 ■ Application Circuit VCC=13.2V + – VCC Pin 2000µF 1 IN Ch.1 – + 6 2 1µF 7 + – 100µF GND OUT Ch.1 4Ω 3 8 0.047µF 4 0.1 µF 200Ω 10 GND (Input side) AN7174K 13 + 2.2Ω Ripple Filter Pin + – IN Ch.2 – 0.1µF 2.2Ω 200µF 12 16 1µF 11 + – 100µF GND OUT Ch.2 15 4Ω 9 0.47µF 14 0.1µF 0.1 µF 200Ω 2.2Ω 2.2Ω 5 (STAND-BY) +5V (Normal ON mode) 0V (stand-by mode) Note) 100 125 Ambient Temperature Ta (˚C) 300mV, 120Hz ripple component should be applied at the measurement of ripple rejection ratio. 150 ICs for Audio Common Use AN7174K ■ Pin Descriptions Pin Name Pin No. Description 1 Supply Pin Supply connection pin 2 Output Ch.1 Ch.1 positive-phase output pin 3 GND (Output Ch.1) GND pin for Ch.1 output 4 Output Ch.1 Ch.1 reverse-phase output pin 5 Stand-by Circuit mode (stand-by switching pin 6 Input Ch.1 Ch.1 input signal applied pin Equivalent Circuit 2 4 operation) 5 6 7 7 Negative Feedback Ch.1 Ch.1 negative feedback pin (+) 8 Negative Feedback Ch.1 Ch.1 negative feedback pin (–) 8 9 9 Negative Feedback Ch.2 Ch.2 negative feedback pin (–) 10 GND (Input) GND pin for input signal source 11 Negative Feedback Ch.2 Ch.2 negative feedback pin (+) 11 ICs for Audio Common Use AN7174K ■ Pin Descriptions (Cont.) Pin Name Pin No. Description Equivalent Circuit 12 12 Input Ch.2 Ch.2 input signal applied pin 13 Ripple Filter Supply ripple rejection pin 13 14 Output Ch.2 Ch.2 reverse-phase output pin 15 GND (Output Ch.2) GND pin for Ch.2 output 16 Output Ch.2 Ch.2 positive-phase output pin 14 16 ■ Precautions on use 1. 2. 3. 4. 5. 6. 7. 8. Thermal breaking protection The protective operation starts at the chip temperature of 150˚C±5˚C. Overvoltage protection The protective operation starts at VCC – 26V. Ground fault protection The protective operation starts when the contact resistance dropped below 0.3Ω. Load shortcircuit protection The protective operation starts when the contact resistance dropped below 0.3Ω. Atmospheric fault protection The protective operation starts only when a shortcircuit between pins occurred. TAB shortcircuit Even TAB short-circuiting with the GND potential causes no breaking trouble. The operation remains normal even when the load is 2Ω. When the chip temperature abnormally rose, the temperature protection circuit gets actuated, but it is automatically reset when the chip temperature dropped below the set level.