A4954 Просмотр технического описания (PDF) - Allegro MicroSystems
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A4954 Datasheet PDF : 9 Pages
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A4954
Dual Full-Bridge DMOS
PWM Motor Driver
Characteristic Performance
PWM Control Timing Diagram
IN1,
IN3
VIN(1)
GND
VIN(1)
IN2,
IN4
GND
+IREG
IOUTx
0A
-IREG
Forward/
Fast Decay
Reverse/
Fast Decay
Forward/
Slow Decay
Reverse/
Slow Decay
PWM Control Truth Table
IN1, IN3
0
IN2, IN4
1
10×VS > VREF
False
1
0
False
0
1
True
1
0
True
1
1
False
0
0
False
Note: Z indicates high impedance.
OUT1, OUT3
L
H
H/L
L
L
Z
OUT2, OUT4
H
L
L
H/L
L
Z
Function
Reverse
Forward
Chop (mixed decay), reverse
Chop (mixed decay), forward
Brake (slow decay)
Coast, enters Low Power Standby mode after 1 ms
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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