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| ICs for Audio Common Use AN7174K Dual BTL 14W Audio Power Amplifier Circuit s Overview The AN7174K is an integrated circuit for 14W (13.2V, 4) 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. o 3.6 5.90.25 7.70.3 7.80.5 6.330.5 16 0.60.2 Unit : mm 29.960.3 28.00.3 20.00.25 s Features * High output power (BTL 14W x 2) * Stand-by circuit built-in * Protection circuits built-in (temperature, 0.6 R1.8 1.778 overvoltage, VOUT- GND short, Load short, VOUT-VCC short) * Low shock noise from power ON/OFF operation * Fewer external parts * Highly stable operation 1 2.80.3 1.20.1 (0.25) 12.50.3 (14.1) 2.66 (4.06) 3.50.3 2.540.8 1.450.25 1.80.25 (1.2) 1.450.25 16-Lead ZIP Package with Fin (EZIP016-P-0660) s Block Diagram 7 VCC 1 13 6 Input Circuit Stand - by Circuit Input Circuit Input Circuit 11 9 Driver Circuit Output Circuit 8 Input Circuit Driver Circuit Output Circuit 4 3 2 GND 5 Protection Circuit 12 Driver Circuit Driver Circuit Output Circuit Output Circuit 16 15 GND GND 10 14 29.60.3 AN7174K s Absolute Maximum Ratings (Ta= 25C) Parameter Supply Voltage Note 1) Peak Supply Voltage Note 2) Supply Current Power Dissipation Note 3) ICs for Audio Common Use Symbol VCC VCC (surge) ICC PD Topr Tstg Rating 24 50 6 62.5 - 30 ~ + 75 - 55 ~ + 150 Unit V V A W C C Operating Ambient Temperature Storage Temperature Note 1) No Signal Note 2) Time= 0.2s Note 3) Rj- c= 2C/W s Recommended Operating Range (Ta = 25C) Parameter Operating Supply Voltage Range Symbol VCC Range 8V ~ 18V s Electrical Characteristics (VCC = 13.2V, RL= 4, f = 1kHz, Ta = 25C) Parameter Quiescent Circuit Current Output Noise Voltage Voltage Gain Total Harmonic Distortion Maximum Output Power (4) Ripple Rejection Ratio Output Offset Voltage Channel Balance Total Harmonic Distortion Total Harmonic Distortion Frequency Characteristics Frequency Characteristics Crosstalk * With 15Hz ~ 30kHz (12dB/oct) filter Symbol ICQ Vno * GV THD PO RR * VO (offset) CB THD THD fCH fCL CT Condition Vin= 0mV Vin= 0mV, Rg= 10k Vin= 5mV Vin= 5mV THD= 10% Rg= 0, Vin= 0mV, Ripple= 300mV, 120Hz Vin= 0mV Vin= 5mV Vin= 5mV, 100Hz Vin= 5mV, 10kHz Vin= 5mV, -3dB down Vin= 5mV, -3dB down Stand-by Pin ON Vin= 5mV, Rg= 10k 9 35 -300 -1 50.5 min. typ. 120 0.6 52.5 0.2 12.5 40 0 0 0.26 0.45 22 21 21 61 300 1 max. 200 1.5 54.5 0.75 Unit mA mV dB % W dB mV dB % % kHz Hz A dB Quiescent Circuit Current at Stand-by Pin ICQ (STBY-ON) s Characteristics Curve PO - VCC 20 f = 1kHz THD = 10% RL = 4 10 Output Power PO (W) 100 VCC = 13.2V RL = 4 f = 1kHz 10 PO, THD - Vin 100 Voltage Gain GV (dB) 54 52 50 48 46 GV, THD - f GV 16 Maximum Output PO (W) Total Harmonic Distortion THD (%) 12 PO 1 1 8 0.1 4 THD 1.0 VCC = 13.2V 0.8 RL = 4 PO = 1W 0.6 0.4 THD 0.2 0.1 0 0 4 8 12 16 20 0.01 0.1 1 10 0.01 100 10 100 1k 10k 0 100k Supply Voltage VCC (V) Input Voltage Vin (mV) Frequency f (Hz) Total Harmonic Distortion THD (%) ICs for Audio Common Use AN7174K GV, THD - VCC 10 f = 1kHz RL = 4 Vin = 3mV 52 Voltage Gain GV (dB) 50 48 46 44 42 40 38 THD 36 3 4 5 6 7 8 9 10 0 11 0 4 8 9 Total Harmonic Distortion THD (%) GV 8 7 6 5 4 3 2 1 Quiescent Circuit Current ICQ (mA) 160 200 ICQ - VCC 65 60 55 50 Power Dissipation PD (W) 45 40 35 30 25 20 15 10 5 12 16 20 0 3.0W 0 25 (4) 50 20.8W (2) 15.6W (3) 62.5W (1) PD - Ta (1) Tc - Ta (Rj - c = 2C/W) (2) With a 100cm2 x 3 mm Al (Black color coated) or a heat sink (not lacquered) (3) With a 100cm2 x 2 mm Al (4) Witout heat sink 120 80 40 75 100 125 150 Supply Voltage VCC (V) Supply Voltage VCC (V) Ambient Temperature Ta (C) s Application Circuit VCC=13.2V VCC Pin 1 IN Ch.1 + - 2000F - + 1F 6 2 7 + - GND 100F 0.047F 200 3 4 0.1 F 2.2 0.1F 2.2 OUT Ch.1 4 8 GND (Input side) IN Ch.2 10 AN7174K 13 + - Ripple Filter Pin 200F - + 1F 12 16 11 + - 15 14 0.1 F 2.2 0.1F 2.2 100F 0.47F 200 GND OUT Ch.2 4 9 5 (STAND-BY) +5V (Normal ON mode) 0V (stand-by mode) Note) 300mV, 120Hz ripple component should be applied at the measurement of ripple rejection ratio. AN7174K s Pin Descriptions Pin No. 1 Pin Name Supply Pin Description Supply connection pin ICs for Audio Common Use Equivalent Circuit 2 Output Ch.1 Ch.1 positive-phase output pin 2 3 GND (Output Ch.1) GND pin for Ch.1 output 4 Output Ch.1 Ch.1 reverse-phase output pin 4 5 Stand-by Circuit mode (stand-by switching pin operation) 5 6 6 Input Ch.1 Ch.1 input signal applied pin 7 7 Negative Feedback Ch.1 Ch.1 negative feedback pin (+) 8 8 Negative Feedback Ch.1 Ch.1 negative feedback pin (-) 9 9 Negative Feedback Ch.2 Ch.2 negative feedback pin (-) 10 GND (Input) GND pin for input signal source 11 11 Negative Feedback Ch.2 Ch.2 negative feedback pin (+) ICs for Audio Common Use s Pin Descriptions (Cont.) Pin No. Pin Name Description AN7174K 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 14 15 GND (Output Ch.2) GND pin for Ch.2 output 16 Output Ch.2 Ch.2 positive-phase output pin 16 s Precautions on use 1. 2. 3. 4. 5. 6. 7. 8. Thermal breaking protection The protective operation starts at the chip temperature of 150C5C. Overvoltage protection The protective operation starts at VCC - 26V. Ground fault protection The protective operation starts when the contact resistance dropped below 0.3. Load shortcircuit protection The protective operation starts when the contact resistance dropped below 0.3. 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 2. 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. |
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