SERVICE MANUAL
TDA7057AQ
2×8W Stereo BTL Audio Output Amplifier with DC Volume Control
1. Features
·DC volume control
·Few external components
·Mute mode
·Thermal protection
·Short-circuit proof
·No switch-on and switch-off clicks
·Good overall stability
·Low power consumption
·Low HF radiation
·ESD protected on all pins.
2. General Description
The TDA7057AQ is a stereo BTL output
amplifier with DC volume control. The device
is designed for use in TVs and monitors, but is
also suitable for battery-fed portable recorders
and radios.
Missing Current Limiter (MCL)
A MCL protection circuit is built-in. The MCL
circuit is activated when the difference in
current between the output terminal of each
amplifier exceeds 100 mA (typical 300 mA).
This level of 100 mA allows for single-ended
headphone applications.
3. Block Diagram
Fig. 15
4. Refer to Table 17 about Functions and Service Data of the IC’s Pins.
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