描述 Description

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.

特性 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 I2C 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 I2C)
? 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