3946
Half-Bridge Power MOSFET Controller
+VBAT
C1
0.47 μF
C2
10 μF
P
P
CP2
CP1
VREF
VREF
0.1 uF
VREG
BOOT
Charge
Pump
+5 Vref
CREG
ILIM
10
kΩ
10 μF
L
L
P
P
Charge
M
Pump
M
~FAULT
Protection
DC Motor
#1
DC Motor
#2
VREG Undervoltage
Overtemperature
UVLOBOOT
Bootstrap
UVLO
IRF2807
L
RGATE
GH
High Side
Driver
VREF
DT
Turn-On
Delay
33 Ω
200
DC Motor #1
Forward
kΩ
IN1
Control
Logic
S
Slow
Decay
P
VREG
IRF2807
DC Motor #2
L
L
RGATE
Forward
IN2
GL
Low Side
Driver
Slow
Decay
33 Ω
200
kΩ
PGND
LGND
External
+5 V
P
RESET
L
L
P
Diagram C. Independent drivers. Two low-side drives.
10
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
