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MA818 - 3 Phase / Pulse Width Modulation Waveform Generator

General Description

Pin.no.

DC/DG/DP40 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Pin.no.

Key Features

  • s Fully Digital Operation RD.
  • (DS†) NC ALE.
  • (AS†) RST CLK CS TRIP MA818 34 33 32 31 30 s Interfaces with Most Microprocessors s Wide Power-Frequency Range s Carrier Frequency Selectable up to 24kHz s Waveform Stored in External PROM/EPROM s Double Edged Regular Sampling s Selectable Minimum Pulse Width and Underlap Time s DC Injection Braking MOTEL is a registered Trademark of Intel Corp. and Motorola Corp. 17 29 18 19 20 21 22 23 24 25 26 27 28 ZPP RPHB YPHB BPHB NC BPHT YPH.

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Datasheet Details

Part number MA818
Manufacturer GEC Plessey Semiconductors
File Size 368.37 KB
Description 3 Phase / Pulse Width Modulation Waveform Generator
Datasheet download datasheet MA818 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS ADVANCE INFORMATION 3797-2·2 MA818 THREE-PHASE PULSE WIDTH MODULATION WAVEFORM GENERATOR The MA818 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 six switches in a three-phase inverter bridge. This is usually via an external isolation and amplification stage. Rotational frequency is defined to 12 bits for high accuracy and a zero setting is included in order to implement DC injection braking with no software overhead.