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3932_03 Datasheet

  • 3932_03

  • THREE-PHASE POWER MOSFET CONTROLLER

  • 13頁

  • ALLEGRO   ALLEGRO

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3932
RESET
PGND
AGND
GLC
DEAD
REF
SC
THREE-PHASE POWER
MOSFET CONTROLLER
The A3932SEQ is a three-phase MOSFET controller for use with bi-
polar brushless dc motors. Its high gate-current drive capability allows
driving a wide range of n-channel power MOSFETs and can support
motor supply voltages to 50 V. Bootstrapped high-side drive blocks
provide the 鏗俹ating positive supplies for the gate drive and minimize
the component count normally required. The high-side circuitry also
employs a unique FET monitoring circuit that ensures the gate voltages
are at the proper levels before turn-on and during the ON cycle.
Internal 鏗亁ed off-time PWM current-control circuitry can be used to
regulate the maximum load current to a desired value. The peak load-
current limit is set by the user鈥檚 selection of an input reference voltage
and external sensing resistor. The 鏗亁ed off-time pulse duration is set by
a user-selected external RC timing network. For added 鏗俥xibility, the
continued ...
32
31
30
3
4
2
1
Data Sheet
26301.101d
GHC
CC
GLB
SB
GHB
CB
GLA
SA
GHA
5
6
7
8
9
10
29
28
27
26
25
24
SENSE
RC
PWM
TACH
SR
BRAKE
DIR
H2
H3
CONTROL LOGIC
11
12
13
23
19
22
21
FAULT
FEATURES
AND
BENEFITS
14
17
18
VBB
19
VREG
15
LCAP
16
H1
20
Dwg. PP-068-1
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25擄C
Supply Voltage, V
BB
..............................
50 V
Peak Regulator Voltage, V
REG
...............
15 V
Logic Input Voltage Range,
V
IN
...................
-0.3 V to V
LCAP
+ 0.3 V
Sense Voltage Range,
V
SENSE
............................
-5 V to +1.5 V
Output Voltage Range,
V
SA
, V
SB
, V
SC
..................
-5 V to +50 V
V
GHA
, V
GHB
, V
GHC
..
-5 V to V
BB
+ 17 V
V
CA
, V
CB
, V
CC
.....................
V
SX
+ 17 V
Operating Temperature Range,
T
A
.................................. -20擄C to +85擄C
Junction Temperature, T
J
..................
+150擄C
Storage Temperature Range,
T
S
...............................
-55擄C to +150擄C
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Drives Wide Range of N-Channel MOSFETs
Synchronous Recti鏗乧ation
Power MOSFET Protection
Adjustable Dead Time for Cross-Conduction Protection
100% Duty Cycle Operation
Selectable Fast or Slow Current-Decay Modes
Internal PWM Peak Current Control
High-Current Gate Drive
Motor Lead Short-to-Ground Protection
Internal 5-V Regulator
Brake Input
PWM Torque-Control Input
Fault-Diagnostic Output
Tachometer Output
Thermal Shutdown
Undervoltage Protection
FAULT
MODE
CA

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