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TDA8547T Datasheet(PDF) 4 Page - NXP Semiconductors |
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TDA8547T Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 24 page 1997 Oct 07 4 Philips Semiconductors Preliminary specification 2 × 1 W BTL audio amplifier with output channel switching TDA8547 PINNING SYMBOL PIN DESCRIPTION GND1 1 ground, channel 1 OUT1+ 2 positive loudspeaker terminal, channel 1 MODE 3 operating mode select (standby, mute, operating) SVRR 4 half supply voltage, decoupling ripple rejection SELECT 5 input for selection of operating channel n.c. 6 not connected OUT2+ 7 positive loudspeaker terminal, channel 2 GND2 8 ground, channel 2 VCC2 9 supply voltage, channel 2 OUT2 − 10 negative loudspeaker terminal, channel 2 IN2 − 11 negative input, channel 2 IN2+ 12 positive input, channel 2 IN1+ 13 positive input, channel 1 IN1 − 14 negative input, channel 1 OUT1 − 15 negative loudspeaker terminal, channel 1 VCC1 16 supply voltage, channel 1 Fig.2 Pin configuration. handbook, halfpage TDA8547 MGK696 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GND1 OUT1 + MODE SVRR SELECT n.c. OUT2 + GND2 VCC2 OUT2 − IN2 − IN2 + IN1 + IN1 − OUT1 − VCC1 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. MODE pin 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 or grounded, then only channel 2 can operate and the power amplifier of channel 1 will be in the standby mode. In this case only the loudspeaker at channel 2 can operate and the loudspeaker at channel 1 will be switched off. If the SELECT pin is set to a HIGH level or connected to VCC, then only channel 1 can |
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