A3946KLB-T Allegro Microsystems Inc, A3946KLB-T Datasheet - Page 9
![IC MOSFET CONTROLLER 16-SOIC](/photos/7/46/74638/a3946klb_sml.jpg)
A3946KLB-T
Manufacturer Part Number
A3946KLB-T
Description
IC MOSFET CONTROLLER 16-SOIC
Manufacturer
Allegro Microsystems Inc
Datasheet
1.A3946KLPTR-T.pdf
(14 pages)
Specifications of A3946KLB-T
Applications
DC Motor Controller, Brushless (BLDC), 3 Phase
Number Of Outputs
1
Voltage - Supply
7 V ~ 60 V
Operating Temperature
-40°C ~ 135°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Voltage - Load
-
Other names
620-1060
A3946
Diagram A. Dependent drivers. Unidirectional motor control with braking and dead time. T
IN
Brake
VREF
Forward
External
L
+5 V
k
10
R
15.8 k
DEAD
IN
L
~FAULT
RESET
0.1 uF
VREF
IN2
DT
IN1
L
L
L
P
C2
10 μF
+5 Vref
Application Block Diagrams
L
Protection
VREG Undervoltage
Overtemperature
UVLOBOOT
Turn-On
Delay
VBB
P
Control
Logic
CP
2
Charge
Half-Bridge Power MOSFET Controller
Pump
Charge Pump
C1
0.47 μF
Bootstrap
Top-Off
UVLO
CP1
High Side
Low Side
Driver
Driver
I
LIM
P
VREG
L
DEAD
GH
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
VREG
BOOT
GL
LGND
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
PGND
S
= 1 μs; Q
0.47 μF
C
33
R
BOOT
L
GATE
R
33
GATE
P
TOTAL
IRF2807
IRF2807
C
10 μF
REG
P
470
k
= 160 nC.
+VBAT
M
P
DC
Motor
9