A3931 Allegro MicroSystems, Inc., A3931 Datasheet - Page 2

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

A3930
A3931
Description (continued)
torque control, allowing the internal current control circuit to set
the maximum current limit.
Efficiency is enhanced by using synchronous rectification. The
power FETs are protected from shoot-through by integrated
crossover control with dead time. The dead time can be set by a
single external resistor.
The A3930 and A3931 only differ in their response to the all-zero
Subject to Change Without Notice
Preliminary Data Sheet
Absolute Maximum Ratings
Load Supply Voltage
Logic Input/Output Voltage
Output Voltage Range
Operating Temperature Range (K)
Junction Temperature
Storage Temperature Range
April 6, 2006
Selection Guide
A3930KJP-T
A3931KJP-T
Part Number
and
Parameter
Hall short detection
Prepositioning
Option
Symbol
V
V
V
RESET
V
V
V
T
T
T
GHx
GLx
BB
Cx
Sx
A
S
J
VBB pin
RESET pin input
Remaining logic pins
GHA, GHB, and GHC pins
GLA, GLB, and GLC pins
CA, CB, and CC pins
SA, SB, and SC pins
CSP, CSN, and LSS pins
CSO, VDSTH pins
VDRAIN pin
250 pieces/tray
Automotive 3-Phase BLDC Controller
Packing
Conditions
combination on the Hall inputs. In this state, the A3930 indicates
a logic fault, but the A3931 prepositions the motor in an unstable
starting position suitable for start-up algorithms in microprocessor-
driven “sensor-less” control systems.
Both devices are supplied in a 48-pin LQFP with exposed thermal
pad. This is a small footprint (81 mm
(Pb) free, with 100% matte tin leadframe plating.
Terminals
48
and MOSFET Driver
Min.
–0.3
–0.3
–0.3
–0.3
–40
–55
V
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
–5
–5
–4
–
–
–
Sx
LQFP surface mount
Typ.
2
Package
–
–
–
–
–
–
–
–
–
–
–
–
) power package, that is lead
V
V
Max.
Sx
Sx
135
150
150
6.5
6.5
50
16
45
55
6
7
+ 15
+ 15
Units
°C
°C
°C
V
V
V
V
V
V
V
V
V
2