A3941 Allegro MicroSystems, Inc., A3941 Datasheet - Page 18

• Manufacturer Part Number: A3941
• Description: Automotive Full Bridge MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3941
Input and Output Structures
VBB
PHASE
PWMx
SR
18 V
(E) Logic inputs, no pulldown
20 V
(A) Gate drive outputs
ESD
Figure 4. Supply routing suggestions
3 kΩ
8.5 V
18 V
18 V
Controller Supply Ground
Quiet Ground
GHx
VREG
GLx
LSS
Cx
Sx
VREG
VS
VDSTH
RDEAD
A3941
VBB
GND
(B) Supply protection structures
VDRAIN
VDSTH
Automotive Full Bridge MOSFET Driver
GHB
18 V
GHA
GLA
GLB
LSS
SB
SA
(F) V
CP1
DS
10 Ω
ESD
(C) Fault output
monitor threshold input
CP2
Optional reverse
battery protection
Optional components
to limit LSS transients
ESD
1 kΩ
8.5 V
19 V
19 V
20 V
VDRAIN
FFx
Power Ground
R
S
RDEAD
RESET
18 V
18 V
18 V
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
VBB
6 V
ESD
(D) RESET input
+ Supply
Supply
Common
(G) RDEAD
50 kΩ
3 kΩ
100 Ω
8.5 V
Motor
6 V
6 V
VS
ESD
1.2 V
18