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TDA1557Q Scheda tecnica(PDF) 4 Page - NXP Semiconductors |
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TDA1557Q Scheda tecnica(HTML) 4 Page - NXP Semiconductors |
4 / 10 page May 1992 4 Philips Semiconductors Product specification 2 x 22 W BTL stereo car radio power amplifier with speaker protection TDA1557Q PINNING SYMBOL PIN DESCRIPTION INP1 1 input 1 GND1 2 ground (signal) VP1 3 supply voltage 1 OUT1A 4 output 1A GND 5 power ground 1 OUT1B 6 output 1B OUT2A 7 output 2A GND 8 power ground 2 OUT2B 9 output 2B VP2 10 supply voltage 2 M/SS 11 mute/stand-by switch Vref 12 input reference voltage INP2 13 input 2 Fig.2 Pin configuration. handbook, halfpage MCD322 - 1 1 2 3 4 5 6 7 8 9 10 11 12 13 TDA1557Q INP1 GND1 P1 V OUT1A GND OUT1B OUT2A OUT2B INP2 GND M / SS ref V P2 V FUNCTIONAL DESCRIPTION The TDA1557Q contains two identical amplifiers with differential input stages, and can be used for bridge applications. The gain of each amplifier is fixed at 46 dB. Special features of this device are: a. mute/stand-by switch low stand-by current low mute/stand-by switching current (low cost supply switch) mute facility b. loudspeaker protection when a short circuit to ground is made, which forces a DC voltage of ≥ 1 V across the loudspeaker, a built-in protection circuit becomes active and limits the DC voltage across the loudspeaker to ≤ 1 V c. the harmonic distortion at low frequencies can be decreased by connecting two diodes to ground at pin 12. |
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