描述 Description

The MP7758 is an inductorless, analog input class-D audio amplifier that drives stereo speakers in a bridge-tied load configuration.

The device is a fully integrated audio amplifier, which reduces solution size dramatically. It integrates 240mΩ power MOSFETs and shortcircuit protection circuits.

The MP7758 features start-up/shutdown pop elimination, as well as advanced EMI performance. The device can pass EMC tests without an inductor.

The device utilizes a stereo BTL structure capable of delivering 15W per channel into 8Ω speakers with a 16V power supply. MPS classD audio amplifiers exhibit the high fidelity of

class-AB amplifiers, with high efficiency.

The MP7758 includes an internal circuit that allows the system to automatically shut down after the absence of an audio signal is detected.This feature is well-suited for energy-using products and battery-operated applications.

The device offers an adjustable power limit (PLIMIT) function. The PLIMIT circuit sets a limit on the output peak-to-peak voltage. This is done by limiting the duty cycle to a fixed maximum value. This limit functions as a virtual voltage rail, and is lower than the supply connected to PVCC.

The MP7758 is available in a TSSOP-28 EP package.

特性 Features

? 5V to 18V Operation from a Single Supply
? ±5A Peak Current Output
? Output Power: 9.5W/Channel at 12V, 8Ω Load, 10% THD
? 15W/Channel at 16V, 8Ω Load, 10% THD
? 90% Efficiency with 8Ω Load, 10% THD, 1kHz, 12V Supply Voltage
? 240mΩ Power MOSFETs
? Start-Up/Shutdown Pop Elimination
? Short-Circuit Protection Circuits
? Inductorsless Topology
? Advanced EMI Performance
? All Switches Current Limited
? Internal Under-Voltage Protection (UVP)
? Internal Thermal Protection
? Adjustable Power Limit
? Automatic Shutdown with Zero Input Signal Detection
? Fault Output Flag
? Available in a TSSOP-28EP Package