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.
Features
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
Circuit Diagram
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| circuit diagram for dual channel 46W |
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| single channel 92 W/1 Ω amplifier |
