4x25 W quad bridge car radio amplifier TDA7381

General description:

The TDA7381 is a class AB audio power amplifier in Flexiwatt25 package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7381  allows a rail to rail output voltage swing with no need of bootstrap capacitors.

Features:

• 4 x 30 W/4  max.
• 4 x 25 W/4  EIAJ
• 4 x 18 W/4  @ 14.4 V, 1 kHz, 10 %
• 4 x 15 W/4  @ 13.2 V, 1 kHz, 10 %
• Clipping detector
• Low distortion
• Low output noise
• Standby function
• Mute function
• Automute at min. supply voltage detection
• Clipping
• Out to GND short
• Out to VS short
• Thermal shutdown
• Internally fixed gain (26 dB)
• No external compensation
• No bootstrap capacitors
• Output short circuit to GND, to VS, across the load
• Very inductive loads
• Overrating chip temperature with soft 
• thermal limiter

Circuit diagram:

4x25 W quad bridge car radio amplifier

4 × 25 W BTL quad car radio power amplifier

General Description

The TDA8568Q is a integrated class-B output amplifier in a 23-lead Single-In-Line (SIL) plastic power package. It contains four amplifiers in BTL configuration, each with a gain of 40 dB. The output power is 4 × 25 W in a 4 Ω load.

Circuit Diagram

4 × 25 W BTL quad car radio power amplifier

2 × 22 W stereo BTL car radio power amplifier with loudspeaker protection

General Description

The TDA1553CQ is a monolithic integrated class-B output amplifier in a 13-lead plastic DIL-bent-SIL power package. It contains 2 × 22 W amplifiers in BTL configuration.

Circuit Diagram

2 × 22 W stereo BTL car radio power amplifier with loudspeaker protection

4 x 6W POWER AMPLIFIER FOR CAR RADIO

This is a TDA7372 POWER AMPLIFIER FOR CAR RADIO circuit diagram

Circuit Diagram

4 x 6W POWER AMPLIFIER FOR CAR RADIO

Power amplifier with load detection and auto BTL/SE selection

Circuit Diagram:

Power amplifier with load detection and auto BTL/SE selection

3-channel audio amplifier

General description

The TDA8947J contains four identical audio power amplifiers. The TDA8947J can be used as: four Single-Ended (SE) channels with a fixed gain of 26 dB, two times Bridge-Tied Load (BTL) channels with a fixed gain of 32 dB or two times SE channels (26 dB gain) plus one BTL channel (32 dB gain) operating as a 2.1 system. The TDA8947J comes in a 17-pin Dil-Bent-Sil (DBS) power package. The TDA8947J is pin compatible with the TDA8944AJ and TDA8946AJ. The TDA8947J contains a unique protection circuit that is solely based on multiple temperature measurements inside the chip. This gives maximum output power for all

supply voltages and load conditions with no unnecessary audio holes. Almost any supply voltage and load impedance combination can be made as long as thermal boundary conditions (number of channels used, external heatsink and ambient temperature) allow it.

Features

• SE: 1 W to 25 W, BTL: 4 W to 50 W operation possibility (2.1 system)
• Soft clipping
• Standby and mute mode
• No on/off switching plops
• Low standby current
• High supply voltage ripple rejection
• Outputs short-circuit protected to ground, supply and across the load
• Thermally protected
• Pin compatible with TDA8944AJ and TDA8946AJ

Circuit Diagram:

4-channel audio amplifier

2 x 120 W class-D power amplifier

General Description

The TDA8924 is a high efficiency class-D audio power amplifier with very low dissipation. The typical output power is 2 × 120 W. The device comes in a HSOP24 power package with a small internal heatsink. Depending on supply voltage and load conditions a very small or even no external heatsink is required. The amplifier operates over a wide supply voltage range from ±12.5 V to ±30 V and consumes a very low quiescent current.

Circuit Diagram

2 × 120 W class-D power amplifier