TDA7451

® TDA7451 4x7W OR 2x22W CAR RADIO POWER AMPLIFIER PLUS TRIPLE POWER SUPPLY PRELIMINARY DATA HIGH OUTPUT POWER CAPABILITY: 4 x 9.5W OR 2 x 32W/4Ω MAX 4 x 8.5W OR 2 x 28W/4Ω EIAJ 4 x 7W OR 2 x 22W/4Ω @14.4V, 1KHz; 10% MINIMIZED EXTERNAL COUNT - NO NEED OF DECOUPLING CAPACITORS - NO NEED OF BOOTSTRAP CAPACITOR - NO NEED OF EXTERNAL COMPENSATION - INTERNALLY FIXED GAIN (20dB) POP-FREE AUDIO SECTION ST-BY FUNCTION (C-MOS) MUTE FUNCTION (C-MOS) CLIP DETECTOR, THERMAL WARNING, SHORT CIRCUIT DETECTION BUILT-IN VOLTAGE REGULATORS: - 5V @ 150mA WITH RESET - 5V @ 500mA WITH ST-BY - 8.5V @ 200mA WITH ST-BY REGULATORS DIAGNOSTIC FEATURE: UNDERVOLTAGE, 8.5V DROP SENSE, SHORT CIRCUIT, LOAD DUMP, OVER-TEMPERABLOCK DIAGRAM Flexiwatt25 ORDERING NUMBER: TDA7451 TURE PROTECTIONS General: LOAD DUMP OVERRATING CHIP TEMPERATURE Audio Section: OUT SHORT (TO GND, TO Vs AND ACROSS THE LOAD) Power Supply Section: SHORT CIRCUIT PROTECTION (OUT TO GND) IN RR IN RF 10KΩ MUTE 10µF 10KΩ ST-BY 1µF 8.5V 10µF 5V 10µF 5V 22K 10µF 22K 9 1 7 SVR DIAG 19 18,24 S-GND PW-GND + V O1 4 150mA REG. V O2 3 V O3 2 200mA REG. 500mA REG. hvcc 21 RR 25 HVCC LF + 17 + TAB LR DIAG 16 DDL 0.1µF IN LF IN LR 0.1µF D95AU311C 0.1µF 12 11 0.1µF VCC1 VCC2 6 + 20 23 + RF 0.1µF VCC 1000 µF 8 22 + - RESET 10 STCAP 470µF 5 15 14 13 47µF October 1999 1/9 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA7451 ABSOLUTE MAXIMU...