TDA7377 Amplifier vs TDA7388 Amplifier

TDA7377 Description

The TDA7377 is a new technology class AB car radio amplifier, and it is able to work either in DUAL bridge or quad single-ended configuration. The exclusive fully complementary structure of the output stage and the internally fixed gain guarantees the highest possible power performances with few external components. The onboard clip detector simplifies gain compression operation. The fault diagnostics make it possible to detect mistakes during car radio set assembly and wiring in the car.

TDA7388 Description

TDA7388 is a class AB radio amplifier designed for car radio applications. It allows the rail-to-rail output swing for an entirely complementary PNP/NPN output configuration. And it does not require any bootstrap capacitors. Hence, it is a significantly reduced boundary component that makes a compact set.

TDA7388 belongs to package Flexiwatt25 and is a quad bridge amplifier. Therefore, it has four output channels where four speakers can be connected. It has a high output capability with low noise and is a 4-channel amplifier with 25 pins.

TDA7377 Features

• High Output Power@VCC=14.4V, f=1KHz，RL=4Ω:

      – 2 x 35W Max.

      – 2 x 20W@THD= 10%

      – 4 x 6 W @10%

      – 4 x 10W / 2Ω@10%

      – 2 x 30W / EIAJ@ VCC =13.7V，RL=4Ω

• CMOS Compatible Stand-by Function (Low ICC)

• No Audible pop During st-by Operations

• Internally Fixed Gain (26dB BTL and 20dB single-ended)

• No Bootstrap Capacitors and boucherot Cells

• Diagnostics Facility on pin10 when output Clipping, shorted to

• Vcc or GND, thermal shutdown, and soft short at turn on.

• Rail to rail output swing

• Absolute Stability Without Any External Compensation.

TDA7388 Features

• High output power (4x45 W / 4 Ω max and 4x26 W / 4 Ω @14.4 V, 1 kHz, 10%)

• Low output noise

• Standby function

• Mute function

• Low distortion

• Automate at minimum supply voltage detection

• Low external component count

• Operating supply voltage VS: 18 V

• DC supply voltage VS(DC): 28 V

• Peak supply voltage (t=50 ms) VPK: 50 V

• Output peak current IO:

                Repetitive (duty cycle 10% @ f=10 Hz): 4.5 A

                Non-repetitive (t=100 μs): 5.5 A

• Power dissipation Pd: 80 W

• Quiescent current IQ: 190 mA (typ)

• Output power PO: 26 W (typ) (VS = 14.4 V THD = 10%)

• Maximum power output Pmax:

                41 W (@ VS = 14.4 V)

                45W (@ VS = 15.2 V)

• THD: 0.04% (@PO = 4 W)

TDA7377 Applications

1. Connect to speakers

Connect the two wires of the speakers to the audio output port of the power amplifier, the left channel speaker is connected to the LOUT port of the amplifier and the right channel speaker is connected to the ROUT port, the positive connects to "+", the negative connects to "-".

2. Connect to sound source

Use an audio cable with an end of 3.5mm stereo headphone plug and plug in the 3.5 stereo headphone jack of the amplifier.

The other end of the audio cable is connected to the audio source (such as computers, mobile phones, MP3, DVD).

3. Connecting to the power supply

1) Connect to the adapter of the power supply

Use the power supply in which the output is above DC12V3A.

Connect the adapter's output cable to the 12V port of the power amplifier board.

The positive connects to the "+" of the port while the negative connects to "-".

2) Connect voltage converter

Use the voltage converter in which the output is above AC12V3A.

Connect the two output cables of the converter to the 12V port of the power amplifier board.

Because the converter's output is alternating current, it is not positive or negative.

4. Play music

Plugin the power, and the blue power indicator will light up which means that the power amplifier board starts working.

You can adjust the volume knob according to their preferences.

TDA7388 Applications

• In-Car Radios

• It can be used for Portable Speakers, Portable DVD Players, Game Machines

• Any possible Quad Bridge amplifier-based project.

TDA7377 pinout

TDA7388 pinout

TDA7377 Equivalents

TDA7377 and TDA7379 are class AB audio processor amplifiers that can operate in dual bridge or quad single-ended mode. The TDA 7377 has an operating supply voltage of 18v, whereas the TDA7379 has a 20v operating supply voltage. They are both equivalents to one another.

TDA7388 Equivalents

The equivalent amplifier ICs for TDA7388 is TDA7851F, TDA7561, TDA7387EP, and TB2941HQ .

TDA7377 Protection Systems

• Load Dump Voltages surge

• Reversed Battery

• Output DC Short Circuit protection with the low current when shorted to GND or VCC.

• Output AC short circuit protection: across the load

• Silent Turn On/Off

• thermal shutdown

• Load very Inductive speakers

• Fortuitous Open GND

• ESD

TDA7388 Protection Systems

• Output short circuit to GND, to Vs across the load

• Very inductive loads

• Overrating chip temperature with thermal limiter

• Load dump voltage

• Fortuitous open GND

• Reversal battery

• ESD

TDA7377 Datasheet

TDA7388 Datasheet