LM4652中文资料Overture™ Audio Power Amplifier 170W Class D Audio Power Amplifier Solution数据手册TI规格书

描述 Description

General Description
The IC combination of the LM4651 driver and the LM4652 power MOSFET provides a high efficiency, Class D sub woofer amplifier solution.
The LM4651 is a fully integrated conventional pulse width modulator driver IC. The IC contains short circuit, under voltage, over modulation, and thermal shut down protection circuitry. It contains a standby function, which shuts down the pulse width modulation and minimizes supply current. The LM4652 is a fully integrated H-bridge power MOSFET IC in a TO-220 power package. Together, these two IC’s form a simple, compact high power audio amplifier solution complete with protection normally seen only in Class AB amplifiers. Few external components and minimal traces between the IC’s keep the PCB area small and aids in EMI control.Key Specifications
Output power into 4Ω with < 10% THD. 170W (Typ)
THD at 10W, 4Ω, 10 − 500Hz. < 0.3% THD (Typ)
Maximum efficiency at 125W 85% (Typ)
Standby attenuation. 100dB (Min)

特性 Features

Conventional pulse width modulation.
Externally controllable switching frequency.
50kHZ to 200kHz switching frequency range.
Integrated error amp and feedback amp.
Turn−on soft start and under voltage lockout.
Over modulation protection (soft clipping).
Short circuit current limiting and thermal shutdown protection.
15 Lead TO−220 isolated package.
Self checking protection diagnostic.Applications
Powered subwoofers for home theater and PC’s
Car booster amplifier
Self-powered speakers