3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
Terminal Functions
Terminal
Number
Terminal Name
Function
VDRAIN
LSS
GLB
SB
Kelvin connection to MOSFET high-side drains
Gate-drive source return, low-side
Gate-drive B output, low-side
Motor phase B input
1
2
3
4
GHB
CB
Gate-drive B output, high-side
Bootstrap capacitor B
5
6
VIN
Regulated 13 V gate drive supply input
Regulated 13 V gate drive supply output
Bootstrap A capacitor
7
VREG13
CA
8
9
GHA
SA
Gate-drive A output, high-side
Motor phase A input
10
11
12
13
14
15
16
GLA
VBB
CP2
VCP
CP1
GND
Gate-drive A output, low-side
Battery supply
Charge pump connection for pumping capacitor
Charge pump output
Charge pump connection for pumping capacitor
Common ground and dc supply returns
Electrically connected to exposed thermal pad of LP package
17
18
19
20
21
22
23
24
25
26
27
28
FAULT
OVSET
VREG5
MODE
SR
Open-drain fault output
DC input, overvoltage threshold setting for VBB
Regulated 5 V supply output
Control input
Control input
ENABLE
PHASE
RESET
LONG
Control input
Control input
Control input
Control input, long or short deadtime
Adjust current for basic deadtime
DC input, drain-to-source monitor threshold voltage
IDEAD
VDSTH
www.allegromicro.com
7
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
