Philips UM10155 - Introduction

UM10155_2 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
User manual Rev. 02 — 5 September 2006 3 of 12
Philips Semiconductors
UM10155
Discrete Class D High Power Audio Amplifier
1. Introduction
The Universal Class D (UcD) version 1.00 demonstrator board implements a 200 W true
RMS (into a 4 Ω load) high quality audio power amplifier on a very compact printed-circuit
board. The amplifier is built-up of discrete components only, and makes use of Philips
patent WO 03/090343.
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 (e.g. 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.
Fig 1. General view
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