文档介绍：UM10155
Discrete Class D High Power Audio Amplifier
Rev. 02 — 5 September 2006 User manual
Document information
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Keywords Class D Audio Amplifier, Universal Class D, UcD, PWM Audio Amplifier,
High Power Audio.
Abstract This user manual describes the operating instructions and the most
important background information of the Philips Semiconductor Discrete
Class D High Power Audio Amplifier Demonstrator Board. With proper
heatsinking of the Power MOSFETs and a well dimensioned power supply,
the PWM amplifier is capable of supplying 200 W of high quality audio
power into a 4 Ω loudspeaker.
Philips Semiconductors UM10155
Discrete Class D High Power Audio Amplifier
Revision history
Rev Date Description
02 20060905 corrected Figure 9.
01 20060801 initial version
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UM10155_2 © Koninklijke Philips Electronics . 2006. All rights reserved.
User manual Rev. 02 — 5 September 2006 2 of 12
Philips Semiconductors UM10155
Discrete Class D High Power Audio Amplifier
1. Introduction
The Universal Class D (UcD) version demonstrator board implements a 200 W true
RMS (into a 4 Ω load) high quality audio power amplifier on a pact printed-circuit
board. The amplifier is built-up of ponents only, and makes use of Philips
patent WO 03/090343.
001aaf148
Fig 1. General view
The demonstrator board is intended to illustrate the capability of Philips Power MOSFETs
in discrete high-end PWM audio amplifier applications. The board is self-contained and
only requires a simple (non-stabilized) dual power supply, an audio source (. function
generator, CD player) and a loudspeaker to demonstrate its capabilities. For evaluation at
high output power a provision is made to attach an appropriate heatsink to the MOSFETs
on the board.
UM10155_2 © Koninklijke Philips Electronics . 2006. All rig