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A8905CLB

Part Number	A8905CLB
Manufacturer	Allegro MicroSystems
Description	3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
Published	Mar 23, 2005
Detailed Description	8905 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER 8905 Data Sheet 26301.3 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVE...
Datasheet	A8905CLB PDF File

Overview

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.
A serial port allows the user to program various 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 CENTERTAP BRAKE C RES ABSOLUTE MAXIMUM RATINGS at TA = +25°C Load Supply Voltage, VBB .
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14 V Output Current, IOUT .
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±1.
25 A Logic Supply Voltage, VDD .
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6.
0 V Logic Input Voltage Range, VIN .
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-0.
3 V to VDD + 0.
3 V Package Power Dissipation, PD .
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See Graph Operating Temperature Range, TA .
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0°C to +70°C Junction Temperature, TJ .
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+150°C† Storage Temperature Range, TS .
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-55 °C to +150°C † Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry.
These conditions can be tolerated, but should be avoided.
Output current rating may be restricted to a value determined by system concerns and factors.
These include: system duty cycle and timing, ambient temperature, and use of any heatsinking and/or forced cooling.
For reliable operation, the specified maximum junction temperature should not be exceeded.
T C U Y D L O N R O P E D C E...

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A8905CLB 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING - Allegro MicroSystems

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