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TDA8547 Dataheets PDF



Part Number TDA8547
Manufacturers NXP
Logo NXP
Description 2 x 1 W BTL audio amplifier with output channel switching
Datasheet TDA8547 DatasheetTDA8547 Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET TDA8547 2 × 1 W BTL audio amplifier with output channel switching Preliminary specification File under Integrated Circuits, IC01 1997 Oct 07 Philips Semiconductors Preliminary specification 2 × 1 W BTL audio amplifier with output channel switching FEATURES • Selection between output channels • Flexibility in use • Few external components • Low saturation voltage of output stage • Gain can be fixed with external resistors • Standby mode controlled by CMOS compatib.

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INTEGRATED CIRCUITS DATA SHEET TDA8547 2 × 1 W BTL audio amplifier with output channel switching Preliminary specification File under Integrated Circuits, IC01 1997 Oct 07 Philips Semiconductors Preliminary specification 2 × 1 W BTL audio amplifier with output channel switching FEATURES • Selection between output channels • Flexibility in use • Few external components • Low saturation voltage of output stage • Gain can be fixed with external resistors • Standby mode controlled by CMOS compatible levels • Low standby current • No switch-on/switch-off plops • High supply voltage ripple rejection • Protected against electrostatic discharge • Outputs short-circuit safe to ground, VCC and across the load • Thermally protected. GENERAL DESCRIPTION APPLICATIONS • Telecommunication equipment • Portable consumer products • Personal computers • Motor-driver (servo). TDA8547 The TDA8547(T) is a two channel audio power amplifier for an output power of 2 × 1 W with an 8 Ω load at a 5 V supply. The circuit contains two BTL amplifiers with a complementary PNP-NPN output stage and standby/mute logic. The operating condition of all channels of the device (standby, mute or on) is externally controlled by the MODE pin. With the SELECT pin one of the output channels can be switched in the standby condition. This feature can be used for loudspeaker selection and also reduces the quiescent current consumption. The TDA8547T comes in a SO16 package and the TDA8547 in a DIP16 package. QUICK REFERENCE DATA SYMBOL VCC Iq Istb Po THD SVRR PARAMETER supply voltage quiescent current standby current output power total harmonic distortion supply voltage ripple rejection THD = 10%; RL = 8 Ω; VCC = 5 V Po = 0.5 W VCC = 5 V; 2 channels VCC = 5 V; 1 channel CONDITIONS MIN. 2.2 − − − 1 − 50 TYP. 5 15 8 − − 0.15 − MAX. 18 22 12 10 − − − UNIT V mA mA µA W % dB ORDERING INFORMATION TYPE NUMBER TDA8547T TDA8547 PACKAGE NAME SO16 DIP16 DESCRIPTION plastic small outline package; 16 leads; body width 7.5 mm plastic dual in-line package; 16 leads (300 mil); long body VERSION SOT162-1 SOT38-1 1997 Oct 07 2 Philips Semiconductors Preliminary specification 2 × 1 W BTL audio amplifier with output channel switching BLOCK DIAGRAM TDA8547 handbook, full pagewidth VCC1 VCC2 16 9 − IN1− IN1+ 14 13 − + R VCC1 R 15 OUT1− 20 kΩ − − + 2 OUT1+ 20 kΩ STANDBY/MUTE LOGIC − IN2− IN2+ 11 12 TDA8547 10 OUT2− − + R VCC2 R 20 kΩ 4 20 kΩ 3 5 − − + 7 OUT2+ SVRR MODE SELECT STANDBY/MUTE LOGIC 1 GND1 8 GND2 MGK697 Fig.1 Block diagram. 1997 Oct 07 3 Philips Semiconductors Preliminary specification 2 × 1 W BTL audio amplifier with output channel switching PINNING SYMBOL GND1 OUT1+ MODE SVRR SELECT n.c. OUT2+ GND2 VCC2 OUT2− IN2− IN2+ IN1+ IN1− OUT1− VCC1 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DESCRIPTION ground, channel 1 positive loudspeaker terminal, channel 1 operating mode select (standby, mute, operating) half supply voltage, decoupling ripple rejection input for selection of operating channel not connected positive loudspeaker terminal, channel 2 ground, channel 2 supply voltage, channel 2 negative loudspeaker terminal, channel 2 negative input, channel 2 positive input, channel 2 positive input, channel 1 negative input, channel 1 negative loudspeaker terminal, channel 1 supply voltage, channel 1 MODE pin Fig.2 Pin configuration. TDA8547 handbook, halfpage GND1 1 OUT1+ 2 MODE 3 SVRR 4 16 VCC1 15 OUT1− 14 IN1− 13 IN1+ TDA8547 SELECT 5 n.c. 6 OUT2+ 7 GND2 8 MGK696 12 IN2+ 11 IN2− 10 OUT2− 9 VCC2 FUNCTIONAL DESCRIPTION The TDA8547(T) is a 2 × 1 W BTL audio power amplifier capable of delivering 2 × 1 W output power to an 8 Ω load at THD = 10% using a 5 V power supply. Using the MODE pin the device can be switched to standby and mute condition. The device is protected by an internal thermal shutdown protection mechanism. The gain can be set within a range from 6 to 30 dB by external feedback resistors. Power amplifier The power amplifier is a Bridge-Tied Load (BTL) amplifier with a complementary PNP-NPN output stage. The voltage loss on the positive supply line is the saturation voltage of a PNP power transistor, on the negative side the saturation voltage of a NPN power transistor. The total voltage loss is <1 V and with a 5 V supply voltage and an 8 Ω loudspeaker an output power of 1 W can be delivered. The whole device (both channels) is in the standby mode (with a very low current consumption) if the voltage at the MODE pin is >(VCC − 0.5 V), or if this pin is floating. At a MODE voltage level of less than 0.5 V the amplifier is fully operational. In the range between 1.5 V and VCC − 1.5 V the amplifier is in mute condition. The mute condition is useful to suppress plop noise at the output caused by charging of the input capacitor. SELECT pin If the voltage at the SELECT pin is in the range between 1.5 V and VCC − 1.5 V, or if it is kept floating, then both channels can be operational. If the SELECT pin is set to a LOW voltage.


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