3946
Half-Bridge Power MOSFET Controller
+VBAT
C1
0.47 μF
C2
10 μF
P
CP2
CP1
VREF
VREF
0.1 uF
VREG
BOOT
Charge
Pump
+5 Vref
P
CREG
ILIM
10
kΩ
10 μF
L
L
P
P
Charge
Pump
~FAULT
M
Protection
VREG Undervoltage
Overtemperature
UVLOBOOT
Bootstrap
UVLO
CBOOT
DC Motor #2
0.47 μF
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
VREG
DC Motor #2
L
L
IRF2807
RGATE
Forward
IN2
GL
Slow
Decay
Low Side
Driver
33 Ω
200
kΩ
PGND
LGND
External
+5 V
M
RESET
P
DC Motor #1
L
P
L
Diagram B. Independent drivers. One high-side drive and one low-side drive.
9
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