A3938SLD Allegro Microsystems Inc, A3938SLD Datasheet - Page 3

• Manufacturer Part Number: A3938SLD
• Description: IC CTRLR MOSFET 3PH 38-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3938SLD

• Applications: DC Motor Controller, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Voltage - Supply: 18 V ~ 50 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Voltage - Load: -

A3938
C
T
0.1 uF
RESET
BRAKE
FAULT
+
MODE
AGND
DEAD
LCAP
PWM
REF
DIR
RC
H1
H2
H3
R
T
A
For 12 V applications, VBB must be shorted to VREG. For this condition, the absolute
maximum rating of 15 V on VREG must be maintained to prevent damage to the A3938.
Fixed Off-Time
Dead-Time
RC Blanking
O.D.
Adjust
Control
Logic
(This diagram shows only one of the three outputs)
Short to GND
TSD
Invalid Hall
VREG Undervoltage
Functional Block Diagram
Protection
Protection
High-Side
Low-Side
Three-Phase Power MOSFET Controller
Logic
Logic
V
REG
RESET
UVLO
Charge Pump
Regulator
Turn-On
Turn-On
Delay
Delay
VREG
VREG
Power Loss
High-Side
Driver
Low-Side
Driver
Brake
VBB
VREG
CA
GHA
SA
GLA
SENSE
PGND
BRKCAP
BRKSEL
0.1 uF
A
C
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
BOOT
+
10 uF
+
R
4.7uF
S
+
0.1 uF
To Phase C
To Phase B
3