1. General description
The TDA8594 is a complementary quad Bridge Tied Load (BTL) audio power amplifier
made in BCDMOS technology. It contains four independent amplifiers in BTL
configuration. Through the I
2
C-bus, diagnosis of temperature warning and clipping level is
fully programmable and the information available via two diagnostic pins is selectable.
The status of each amplifier (output offset, load or no load, short-circuit or speaker
incorrectly connected) can be read separately.
2. Features and benefits
2.1 General
Operates in legacy mode (non I
2
C-bus) and I
2
C-bus mode (3.3 V and 5 V compliant)
Three hardware-programmable I
2
C-bus addresses
Drives 4 or 2 loads
Speaker fault detection
Independent short-circuit protection per channel
Loss of ground and open V
P
safe (with 200 m series impedance and a supply
decoupling capacitor of 2200 F maximum)
All outputs short-circuit proof to ground, supply voltage and across the load
All pins short-circuit proof to ground
Temperature-controlled gain reduction to prevent audio holes at high junction
temperatures
Low battery voltage detection
Offset detection
This part has been qualified in accordance with AEC-Q100
2.2 I
2
C-bus mode
DC load detection: open-circuit, short-circuit and load present
AC load (tweeter) detection
During start-up, can detect which load is connected so the appropriate gain can be
selected without audio pop
Independently selectable soft mute of front channels (channel 1 and channel 3) and
rear channels (channel 2 and channel 4)
Programmable gain (26 dB and 16 dB) of front channels (channel 1 and channel 3)
and rear channels (channel 2 and channel 4)
TDA8594
I
2
C-bus controlled 4 50 W power amplifier
Rev. 5 — 11 June 2013 Product data sheet
