A4987 查看數據表（PDF） - Allegro MicroSystems
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A4987 Datasheet PDF : 16 Pages
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A4987
DMOS Dual Full-Bridge PWM Motor Driver
with Overcurrent Protection
Functional Block Diagram
0.1 μF
VREG
0.22 μF
REGULATOR
OSC
CHARGE PUMP
DMOS FULL-BRIDGE 1
Sense2
DAC
OCP
VREF
VDD
IN01
IN02
PH1
IN11
IN12
PH2
SLEEP
OSC
PWM Latch
BLANKING
Mixed Decay
CONTROL
LOGIC
GATE
DRIVE
DMOS FULL-BRIDGE 2
OCP
REF
PWM Latch
BLANKING
Mixed Decay
VREF
OSC
VCP VREG
VREG
VREF
DAC
Sense2
Sense2
VBB1
OUT1A
OUT1B
SENSE1
VBB2
OUT2A
OUT2B
SENSE2
0.1 μF
To
VBB2
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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