4 x 35W HIGH EFFICIENCY QUAD BRIDGE CAR RADIO AMPLIFIER

Circuit Diagram:

TDA7454 4 x 35W audio power amplifier 

4x7W OR 2x22W CAR RADIO POWER AMPLIFIER

Features:

• 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

Circuit Diagram:

TDA7451 2x22 W

TDA7451 4x7W

45W/2Ω BRIDGE CAR RADIO AMPLIFIER WITH DIAGNOSTIC FACILITY

Circuit Diagram:

TDA7396 circuit diagram

2 x 30W dual bridge car radio amplifier

Circuit Diagram:

2 x 30W dual bridge car radio amplifier TDA7394

2 x 32W DUAL BRIDGE CAR RADIO AMPLIFIER TDA7393

Features:

• HIGH OUTPUT POWER CAPABILITY:
• 2 x 35W max./4Ω
• 2 x 32W EIAJ/4Ω
• 2 x 22W typ./4Ω @ 14.4V, 1KHz, 10%
• 2 x 19W typ./4Ω @ 13.2V, 1KHz, 10%
• 2 x 28W typ./2Ω @ 14.4V, 1KHz, 10%
• 2 x 25W typ./2Ω @ 13.2V, 1KHz, 10%
• LOW DISTORTION
• LOW OUTPUT NOISE
• ST-BY FUNCTION
• MUTE FUNCTION
• AUTO-MUTE AT MIN. SUPPLY VOLTAGE
• DETECTION
• LOW EXTERNAL COMPONENT COUNT
• – INTERNALLY FIXED GAIN (32dB)
• – NO EXTERNAL COMPENSATION
• – NO BOOTSTRAP CAPACITORS
• ADDITIONAL MONO INPUT
• OUTPUT AC/DC SHORT CIRCUIT TO GND
• AND TO VS
• VERY INDUCTIVE LOADS
• OVERRATING CHIP TEMPERATURE WITH
• SOFT THERMAL LIMITER

Circuit Diagram:

2 x 32W DUAL BRIDGE CAR RADIO AMPLIFIER

35 W bridge car radio amplifier TDA7391

Features

 High power capability:

– 40 W/4  max

– 35 W/4  EIAJ

– 45 W/3.2  max

– 40 W/3.2  EIAJ

– 32 W/3.2  @ VS = 14.4 V, f = 1 kHz, 

d = 10 %

– 26 W/4 @ VS = 14.4 V, f = 1 kHz, 

d = 10 %

 DIfferential inputs (either single ended or 

differential input signal are accepted)

 Minimum external component count:

– No bootstrap capacitors

– No Boucherot cells

– Internally fixed gain (30 dB)

– No SVR Capacitor

 Standby function (CMOS compatible)

 Programmable turn-on/off delay

 No audible pop during mute and standby 

operations

 Protections:

– Short circuit (to GND, to VS, across the 

load)

– Very inductive loads

– Chip over temperature

– Load dump

– Open GND

– ESD

Description

The TDA7391 is a bridge class AB audio power amplifier specially intended for car radio high power applications. The high power capability together with the possibility to operate either in differential input mode or single ended input mode makes it suitable for boosters and high end car radio equipments. The exclusive fully complementary output stage and the internal fixed gain configuration drop the external component count.The on board clipping detector allows easy implementation of gain compression systems.

Circuit Diagram

35 W bridge car radio amplifier circuit diagram

PCB layout:

35 W bridge car radio amplifier layout pcb

4 x 42 W quad bridge car radio amplifier TDA7385

Features
■ High output power capability:
– 4 x 42 W / 4  max.
– 4 x 23 W / 4  @ 14.4 V, 1 kHz, 10 %
■ Clipping detector
■ Low distortion
■ Low output noise
■ Standby function
■ Mute function
■ Automute at min. supply voltage detection
■ Diagnostics facility for: 
– Clipping
– Out to GND short
– Out to VS short
– Thermal shutdown
■ Low external component count:
– Internally fixed gain (26 dB)
– No external compensation
– No bootstrap capacitors
■ Protections:
– Output short circuit to GND, to VS, across 
the load
– Very inductive loads
– Overrating chip temperature with soft 
thermal limiter
– Load dump voltage
– Fortuitous open GND

Circuit Diagram

4 x 42 W quad bridge car radio amplifier TDA7385