Wiring circuit

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.

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