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8904

Allegro MicroSystems
Part Number 8904
Manufacturer Allegro MicroSystems
Description 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
Published May 2, 2007
Detailed Description 8904 A8904SLB (SOIC) 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING The A8904SLB and A8904SLP are t...
Datasheet PDF File 8904 PDF File

8904
8904

Overview
8904 A8904SLB (SOIC) 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING The A8904SLB and A8904SLP are three-phase brushless dc motor controller/drivers designed for applications where accurate control of highspeed motors is required.
The three half-bridge outputs are low on-resistance n-channel DMOS devices capable of driving up to 1.
2 A.
The A8904 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, direction, and diagnostic modes.
The A8904 is fabricated in Allegro’s BCD (Bipolar CMOS DMOS) process, an advanced mixed-signal technology that combines bipolar, analog and digital CMOS, and DMOS power devices.
The A8904SLB is provided in a 24-lead wide-body SOIC batwing package.
The A8904SLP is provided in a thin (<1.
2 mm), 28-lead TSSOP package with an exposed thermal pad.
Each package type is available in a lead-free version (100% matte tin leadframe).
Data Sheet 26301.
5F Absolute Maximum Ratings Load Supply Voltage, VBB .
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15 V Output Current1, IOUT .
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±1.
4 A Peak Output Current (Brake)2, IOUT(BRK) .
±3.
0 A Period2 for IOUT(BRK) to fall from ±3.
0 A to ±1.
4 A .
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800 ms Logic Supply Voltage, VDD .
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7.
0 V Logic Input Voltage Range, VIN (continuous) .
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-0.
3 V to VDD + 0.
3 V (tw <30 ns) .
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-1.
0 V to VDD + 1.
0 V Package Power Dissipation, PD .
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See Graph Operating Temperature, TA .
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-20°C to +85°C Junction Temperature3, TJ .
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+150°C Storage Temperature,TS .
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-55°C to +150°C 1Output Features „ „ „ „ „ „ „ „ „ „ „ „ „ „ Pin-for-pin replacement for A8902...


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