TDA8594: I²C-bus controlled 4 x 50 W power amplifier ARCHIVED

Overview

Archived content is no longer updated and is made available for historical reference only.

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 I²C-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.

Archived content is no longer updated and is made available for historical reference only.

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Features

General

Operates in legacy mode (non I²C-bus) and I²C-bus mode (3.3 V and 5 V compliant)
Three hardware-programmable I²C-bus addresses
Drives 4 Ω or 2 Ω loads
Speaker fault detection
Independent short-circuit protection per channel
Loss of ground and open V_P safe (with 200 mΩ series impedance and a supply decoupling capacitor of 2200 μF 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

I²C-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)
Fully programmable diagnostic levels can be set:
- Programmable clip detection: 2 %, 5 % or 10 %
- Programmable thermal pre-warning
Selectable information on the DIAG and STB pins:
- The STB pin can be programmed/multiplexed with second clip detection
- Clip information of each channel can be directed separately to the DIAG pin or the STB pin
- Independent enabling of thermal, clip or load fault detection (short across or to V_P or to ground) on DIAG pin

MoreLess

Features

General

Operates in legacy mode (non I²C-bus) and I²C-bus mode (3.3 V and 5 V compliant)
Three hardware-programmable I²C-bus addresses
Drives 4 Ω or 2 Ω loads
Speaker fault detection
Independent short-circuit protection per channel
Loss of ground and open V_P safe (with 200 mΩ series impedance and a supply decoupling capacitor of 2200 μF 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

I²C-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)
Fully programmable diagnostic levels can be set:
- Programmable clip detection: 2 %, 5 % or 10 %
- Programmable thermal pre-warning
Selectable information on the DIAG and STB pins:
- The STB pin can be programmed/multiplexed with second clip detection
- Clip information of each channel can be directed separately to the DIAG pin or the STB pin
- Independent enabling of thermal, clip or load fault detection (short across or to V_P or to ground) on DIAG pin

Data Sheets