LM378 dual4-watt amplifier Mini-stereo

This circuit is built around two chips: the MC1458 dual op amp, configured as a preamplifier, and the LM378 dual4-watt amplifier. The gain of the preamp is given by R3/R1 for one side and R4/R2 for the other side, which is about 100. That gain can be varied by increasing the ratios. The left and right channel inputs are applied to pins 2 and 6. The left and right outputs of U1 at pins 7 and 2 are coupled through CS/ RlO and C3/R6, respectively, to U2 to drive the two 8-0loudspeakers.

LM378 dual4-watt amplifier Mini-stereo

30 Watt x 2 CH AUDIO POWER AMPLIFER

TA8233H Circuit Diagram

Circuit diagram for 30 Watt x 2 CH AUDIO POWER AMPLIFER

Dual 6 to 8 watt audio power amplifier

The HA1394 dual audio power amplifier is specifically designed for audio outputs in modular stereos and mutiplex sound TV's. This HItachi amplifier can deliveri 8.2w per ch when Vcc=25V.

Circuit Diagram:

Dual 6 to 8 watt audio power amplifier

5W dual power amplifier

The BA5406 is a dual-OTL monolithic power IC with two high-output, low-frequency power amplifiers. With a 12V power supply, it has a rated output of 5W 2 into a 3Ω load, and with a 9V power supply, it has a rated output of 2.8W 2 into a 3Ω load. The BA5406 has good low-voltage characteristics, and the “pop” sound when power is applied is small. It generates little radio-band noise, and is ideal for use in stereo radio cassette players.

Circuit diagram:

5W dual power amplifier

Datasheet for BA5406: Download

Dual-channel electronic volume controller

General Description:

The BA3853BFS is a dual-channel electronic volume controller built around a low-noise, low-distortion VCA. It is suited for car-audio applications, and has performance that rivals mechanical-type volume controllers. In addition to volume control, the IC includes all functions required for controlling sound quality, to allow more compact designs with far fewer components.

Circuit diagram:

Dual-channel electronic volume controller

Datasheet for BA3853: Download

Dual bridge audio amplifier for car radio

Features:

Minimum external component count

No bootstrap capacitors

No Boucherot cells

Clip detector output

High output power

Fixed gain

Very low stand-by current (1 µA typ)

No switch on/off noise

Description

The TDA7374 is a class AB audio dual bridge power amplifier in Multiwatt package designed for car radio applications. Thanks to the fully complementary PNP/NPN  output configuration the high power performances  of the TDA7374 are obtained without bootstrap 

capacitors.

Circuit Diagram:

PCB Layout Dual bridge audio amplifier for car radio

Circuit diagram for dual bridge audio amplifier for car radio

DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO

CIRCUIT DIAGRAM for DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO

PCB LAYOUT for DUAL BRIDGE AUDIO AMPLIFIER FOR CAR RADIO

Dual channel 46 W/2 Ω, single channel 92 W/1 Ω amplifier

General description:

The TDA1566 is a car audio power amplifier with a complementary output stage realized in BCDMOS. The TDA1566 has two Bridge Tied Load (BTL) output stages and comes in a HSOP24 or DBS27P package. The TDA1566 can be controlled with or without I2C-bus. With I2C-bus control gain settings per channel and diagnostic trigger levels can be selected. Failure conditions as well as load identification can be read with I2C-bus. The load identification detects whether the outputs of a BTL channel are connected with a DC or AC load and discriminates between a speaker load, a line driver load and an open (unconnected) load. The TDA1566 can be configured in a single BTL mode and drive a 1 Ω load. For the single BTL mode it is necessary to connect on the Printed-Circuit Board (PCB) the outputs of both BTL channels in parallel.

Features:

• Operates in I2C-bus mode and non-I2C-bus mode
• TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-bus addresses controlled by one pin
• Two 4 Ω or 2 Ω capable BTL channels or one 1 Ω capable BTL channel
• Low offset
• Pop free off/standby/mute/operating mode transitions
• Speaker fault detection
• Selectable gain (26 dB and 16 dB)
• In I2C-bus mode:
• DC load detection: open, short and speaker or line driver present
• AC load (tweeter) detection
• Programmable trigger levels for DC and AC load detection
• Per channel programmable gain (26 dB and 16 dB, selectable per channel)
• Selectable diagnostic levels for clip detection and thermal pre-warning
• Selectable information on the DIAG pin for clip information of each channel separately and independent enabling of thermal-, offset- or load fault
• Independent short-circuit protection per channel
• Loss of ground and open VP safe
• All outputs short-circuit proof to VP, GND and across the load
• All pins short-circuit proof to ground
• Temperature controlled gain reduction at high junction temperatures

Circuit Diagram:

circuit diagram for Dual channel 46 W

circuit diagram for sigle channel 92 W

Datasheet for TDA1566: Download

Dual channel 46 W/2 Ω, single channel 92 W/1 Ω amplifier

General description

The TDA1566 is a car audio power amplifier with a complementary output stage realized in BCDMOS. The TDA1566 has two Bridge Tied Load (BTL) output stages and comes in a HSOP24 or DBS27P package. The TDA1566 can be controlled with or without I2C-bus. With I2C-bus control gain settings per channel and diagnostic trigger levels can be selected. Failure conditions as well as load identification can be read with I2C-bus. The load identification detects whether the outputs of a BTL channel are connected with a DC or AC load and discriminates between a speaker load, a line driver load and an open (unconnected) load. The TDA1566 can be configured in a single BTL mode and drive a 1 Ω load. For the single BTL mode it is necessary to connect on the Printed-Circuit Board (PCB) the outputs of both BTL channels in parallel.

Features

Operates in I2C-bus mode and non-I2C-bus mode

TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-bus addresses controlled by one pin.

Two 4 Ω or 2 Ω capable BTL channels or one 1 Ω capable BTL channel

Low offset

Pop free off/standby/mute/operating mode transitions

Speaker fault detection

Selectable gain (26 dB and 16 dB)

In I2C-bus mode:

DC load detection: open, short and speaker or line driver present

AC load (tweeter) detection

Programmable trigger levels for DC and AC load detection

Per channel programmable gain (26 dB and 16 dB, selectable per channel)

Selectable diagnostic levels for clip detection and thermal pre-warning

Selectable information on the DIAG pin for clip information of each channel separately and independent enabling of thermal-, offset- or load fault.

Independent short-circuit protection per channel

Loss of ground and open VP safe

All outputs short-circuit proof to VP, GND and across the load

All pins short-circuit proof to ground

Temperature controlled gain reduction at high junction temperatures

Circuit Diagram

circuit diagram for dual channel 46W

 single channel 92 W/1 Ω amplifier