A3931 Allegro MicroSystems, Inc., A3931 Datasheet - Page 3

• Manufacturer Part Number: A3931
• Description: Automotive 3-Phase BLDC Controller and MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3930
A3931
Subject to Change Without Notice
Preliminary Data Sheet
April 6, 2006
QV5
VBAT+
and
RDEAD
COAST
BRAKE
TACHO
RESET
MODE
PWM
DIRO
V5BD
DIR
CV5
ESF
FF1
FF2
H1
H2
H3
V5
Pad
+5V Ref
Diagnostics and
Protection
–UVLO
–TSD
–Short to Supply
–Short to Ground
–Shorted Winding
–Low Load
VDSTH
Control
Logic
VBB
Functional Block Diagram
RT
RC
Q
OSC
R
S
Phase A of three phases
CP2
CT
Automotive 3-Phase BLDC Controller
Blanking
Regulator
Boostrap
Charge
Charge
Monitor
Pump
Pump
CP1
REF
CP
CSOUT
High-Side
Drive
Low-Side
Drive
AGND
VREG
GHA
GLA
and MOSFET Driver
VREG
SA
LSS
TEST
CSP
CSN
VDRAIN
CA
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
RGLA
CBOOTA
RGHA
CREG
P
RSENSE
H1
H2
H3
P
B
A
V5
C
3