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.
Intrinsic ground clamp and flyback diodes provide protect
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
A8905CLB 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 COMMUTATION DELAY 24 23 C D1 DATA IN CLOCK CHIP SELECT RESET SERIAL PORT 3 4 5 6 7 22 21 20 19 OUTA GROUND GROUND OUT B OUT C
A8905CLB_AllegroMicroSystems.pdf
Datasheet Details
A8905CLB
Allegro MicroSystems
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3-phase brushless dc motor controller/driver.
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