TDA7851 Description

The TDA7851L is a high-power vehicle radio audio power amplifier with revolutionary MOSFET technology in a Flexiwatt25 packaging. The fully complementary P-Channel/N-Channel output structure allows for a rail-to-rail output voltage swing, which, when paired with high output current and minimal saturation losses, sets new power standards in the car-radio market, with unrivaled distortion performance.

TDA7851 Features

• Multipower BCD technology

• High output power capability:

– 4 x 48 W/4 Ω max.

– 4 x 28 W/4 Ω @ 14.4 V, 1 kHz, 10%

– 4 x 72 W/2 Ω max.

• MOSFET output power stage

• Excellent 2 Ω driving capability

• Hi-Fi class distortion

• Low output noise

• Standby function

• Mute function

• Automate at min. supply voltage detection

• Low external component count:

– Internally fixed gain (26 dB)

– No external compensation

– No bootstrap capacitors

• Output DC offset detector

• 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

– Reversed battery

– ESD

TDA7851 Applications

• Televisions

• Consumer Audio Equipment

• Output AC/DC short circuit

• Soft short-circuit check at turn-on

• Thermal cutoff/limiter to prevent the chip from Overheating

• High inductive loads

• ESD