TDA7851L
4 x 45 W MOSFET quad bridge power amplifier
Features
■ Multipower BCD technology
■ High output power capability:
– 4 x 45 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
Flexiwatt 25
■ Low output noise
■ Standby function
■ Mute function
■ Fortuitous open GND
■ Automute at min. supply voltage detection
■ Reversed battery
■ ESD
■ Low external component count:
– Internally fixed gain (26 dB)
– No external compensation
– No bootstrap capacitors
Description
The TDA7851L is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt25 package designed for high power car
radio. The fully complementary P-Channel/N-
Channel output structure allows a rail to rail
output voltage swing which, combined with high
output current and minimized saturation losses
sets new power references in the car-radio field,
with unparalleled distortion performances.
Protections
■ Output short circuit to Gnd, to Vs, across the
load
■ Very inductive loads
■ Overrating chip temperature with soft thermal
limiter
■ Load dump voltage
Table 1.
Device summary
Order code
Package
Flexiwatt 25
Packing
TDA7851L
Tube
May 2009
Rev 1
1/15
www.st.com
1
SAMES [ SAMES ]
