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| 3971 Datasheet, PDF (2/8 Pages) Allegro MicroSystems – DUAL DMOS FULL-BRIDGE DRIVER | |||
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3971
DUAL DMOS
FULL-BRIDGE DRIVER
LOGIC
SUPPLY
VDD
24
S10 3
S11 10
PWM1 11
S20 22
S21 15
PWM2 23
LGND
2
FUNCTIONAL BLOCK DIAGRAM
0.22 µF/100 V
VOLTAGE
REFERENCE
V REF
LOW SIDE SUPPLY
CP2
13
CP1
12
CHARGE PUMP
UVLO &
THERMAL
SHUTDOWN
DMOS H-BRIDGE
VCP
VCP
14
VBB2
20
0.22 µF
50 V
OUT2A
21
OUT2B
16
BRIDGE 1
CONTROL
LOGIC
BRIDGE 2
CONTROL
LOGIC
GATE
DRIVE
DMOS H-BRIDGE
SENSE2
17
RS, CS
(OPTIONAL)
5
VBB1
OUT1A
4
OUT1B
9
LOAD
SUPPLY
67
GROUND
18 19
SENSE1
8
RS, CS
(OPTIONAL)
Dwg. FP-050
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000, Allegro MicroSystems, Inc.
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