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TDA7577BLV：Low voltage operation, high efficiency (class SB), intelligent, dual BTL output power amplifier with full I2C diagnostics including tweeter detection and hardware stand-by/mute

The TDA7577BLV is a new MOSFET dual bridge amplifier specially intended for car radio applications. Thanks to the DMOS output stage the TDA7577BLV has a very low distortion allowing a clear powerful sound, together with high output power capability.

It is a very flexible device capable to support the most demanding specifications in terms of power dissipation and battery transitions: its superior efficiency performance, coming from the internal exclusive structure, can reduce the dissipated output power up to the 50 % (when compared to conventional class AB solutions). Moreover it is compliant to the recent OEM specifications thanks to the capability to work down to 6 V ('start-stop' compatibility).

This device is also equipped with a full diagnostic array that communicates the status of each speaker through the I²C bus. TDA7577BLV can also drive 1 Ω loads (with parallel connection of the outputs).

It is possible also to exclude the I²C bus interface, controlling the device by means of the usual ST-BY and MUTE pins.

Key Features

• MOSFET (DMOS) output power stage
• High-efficiency (class SB)
• Single-channel 1 Ω driving capability
  • 84 W undistorted power
• High output power capability 2 x 28 W / 4 Ω @ 14.4 V, 1 kHz, 10 % THD
• Max. output power 2 x 75 W / 2 Ω,1 x 150 W / 1 Ω
• Full I2 C bus driving with 4 addresses
• Low voltage (6 V) operation (i.e. 'start-stop')
• Gain 16/26 dB
• Full digital diagnostic (AC and DC loads)
• Legacy mode (operation without I2 C)
• Differential inputs
• Fault detection through integrated diagnostics
• DC offset detection
• Two independent short circuit protections
• Diagnostic on clipping detector with selectable threshold (2 % / 10 %)
• Clipping detector pin
• ST-BY and MUTE pins
• ESD protection
• Very robust against misconnections

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