TDA1566
1. 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 W 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.
2. Features
n Operates in I2C-bus mode and non-I2C-bus mode
n TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-bus
addresses controlled by one pin
n Two 4 W or 2 W capable BTL channels or one 1 W capable BTL channel
n Low offset
n Pop free off/standby/mute/operating mode transitions
n Speaker fault detection
n Selectable gain (26 dB and 16 dB)
n In I2C-bus mode:
u DC load detection: open, short and speaker or line driver present
u AC load (tweeter) detection
u Programmable trigger levels for DC and AC load detection
u Per channel programmable gain (26 dB and 16 dB, selectable per channel)
u Selectable diagnostic levels for clip detection and thermal pre-warning
u Selectable information on the DIAG pin for clip information of each channel
separately and independent enabling of thermal-, offset- or load fault
n Independent short-circuit protection per channel
n Loss of ground and open VP safe
n All outputs short-circuit proof to VP, GND and across the load
n All pins short-circuit proof to ground
n Temperature controlled gain reduction at high junction temperatures
