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TDA8542TS Datasheet(PDF) 4 Page - NXP Semiconductors |
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TDA8542TS Datasheet(HTML) 4 Page - NXP Semiconductors |
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4 / 20 page  1998 Mar 25 4 Philips Semiconductors Product specification 2 × 0.7 W BTL audio amplifier TDA8542TS PINNING SYMBOL PIN DESCRIPTION LGND 1 ground, left channel n.c. 2 not connected OUTL+ 3 positive loudspeaker terminal, left channel MODE 4 operating mode select (standby, mute, operating) SVR 5 half supply voltage, decoupling ripple rejection BTL/SE 6 BTL loudspeaker or SE headphone operation n.c. 7 not connected OUTR+ 8 positive loudspeaker terminal, right channel n.c. 9 not connected RGND 10 ground, right channel VCCR 11 supply voltage, right channel n.c. 12 not connected OUTR − 13 negative loudspeaker terminal, right channel INR − 14 negative input, right channel INR+ 15 positive input, right channel INL+ 16 positive input, left channel INL − 17 negative input, left channel OUTL − 18 negative loudspeaker terminal, left channel n.c. 19 not connected VCCL 20 supply voltage, left channel Fig.2 Pin configuration. handbook, halfpage TDA8542TS MBK453 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 LGND n.c. OUTL + MODE SVR BTL/SE n.c. OUTR + n.c. RGND VCCL n.c. OUTL − INL − INL + INR + INR − OUTR − n.c. VCCR FUNCTIONAL DESCRIPTION The TDA8542TS is a 2 × 0.7 W BTL audio power amplifier capable of delivering 2 × 0.7 W output power to a 16 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 with a 16 Ω loudspeaker an output power of 0.7 W can be delivered. Mode select pin The device 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. |
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