TDA1566
I2C-bus controlled dual channel 46 W/2 Ω, single channel
92 W/1 Ω amplifier with load diagnostic features
Rev. 02 — 20 August 2007
Product data sheet
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 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.
2. Features
I Operates in I2C-bus mode and non-I2C-bus mode
I TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-bus
addresses controlled by one pin
I Two 4 Ω or 2 Ω capable BTL channels or one 1 Ω capable BTL channel
I Low offset
I Pop free off/standby/mute/operating mode transitions
I Speaker fault detection
I Selectable gain (26 dB and 16 dB)
I In I2C-bus mode:
N DC load detection: open, short and speaker or line driver present
N AC load (tweeter) detection
N Programmable trigger levels for DC and AC load detection
N Per channel programmable gain (26 dB and 16 dB, selectable per channel)
N Selectable diagnostic levels for clip detection and thermal pre-warning
N Selectable information on the DIAG pin for clip information of each channel
separately and independent enabling of thermal-, offset- or load fault
I Independent short-circuit protection per channel
I Loss of ground and open VP safe
I All outputs short-circuit proof to VP, GND and across the load
I All pins short-circuit proof to ground
I Temperature controlled gain reduction at high junction temperatures