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8905 - 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING

General Description

Power Outputs.

The power outputs of the A8905CLB are n-channel DMOS transistors with a total source plus sink rDS(on) of typically 1.1 Ω.

Internal charge pump boost circuitry provides voltage above supply for driving the high-side DMOS gates.

Key Features

  • and modes of operation, such as the speed control parameters, startup current limit, sleep mode, diagnostic modes, and others. LOAD SUPPLY C D2 C WD CST 1 2 V BB.

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Datasheet Details

Part number 8905
Manufacturer Allegro MicroSystems
File Size 163.20 KB
Description 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
Datasheet download datasheet 8905 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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8905 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER 8905 Data Sheet 26301.3 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING The A8905CLB isw a three-phase brushless dc motor controller/ driver for use with CD-ROM or DVD drives. The three half-bridge outputs are low on-resistance n-channel DMOS devices capable of driving up to 1.25 A. The A8905CLB provides complete, reliable, self-contained back-EMF sensing motor startup and running algorithms. A programmable digital frequency-locked loop speed control circuit together with the linear current control circuitry provides precise motor speed regulation.