MA828 Datasheet (GEC Plessey Semiconductors) - 3 Phase / Pulse Width Modulation Waveform Generator

MA828, 3 Phase / Pulse Width Modulation Waveform Generator

Pin No.

26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 22 23 24 13 14 15 17 18 20 19 21 25 16 Name AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 Intel: WR Motorola: R/W Intel: RD Motorola: DS Intel: ALE Motorola: AS RST CLK CS TRIP ZPPR ZPPY ZPPB RPHB YPHB BPHB BPHT YPHT RPHT SET TRIP WSS VDD VSS Type I I I I I I I I I I I

THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS ADVANCE INFORMATION 3896-1 0 MA828 FAMILY THREE-PHASE PULSE WIDTH MODULATION WAVEFORM GENERATOR The MA828 PWM generator has been designed to provide waveforms for the control of variable speed AC machines, uninterruptible power supplies and other forms of power electronic devices which require pulse width modulation as a means of efficient power control.

The six TTL level PWM outputs (Fig.

2) control the

MA828 Features

* three Zero Phase Pulse (ZPP) outputs and a Waveform Sampling Synchronisation output (WSS) for use as feedback in, for example, slip compensaton systems. Two standard wave shapes are available to cover most applications; in addition, any symmetrical wave shape can be integrated on-chip to order. AD3