A4401 Ver la hoja de datos (PDF) - Allegro MicroSystems
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componentes Descripción
Fabricante
A4401 Datasheet PDF : 17 Pages
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A4401
Automotive Quasi-Resonant Flyback Control IC
Functional Block Diagram
D2
US1J
VBAT
7 to 40V
C1
Optional
EMI Filter
L1
C2
LS1
D3
US1J
C4
22 F
LS2
C6
22 F
D4
STPS160U
C5
100 nF
C7
100 nF
Enable
R1
10 kΩ
VIN
Linear
Control
EN
Logic
Shutdown
Fault
C3
100 nF
Adaptive
turn-on
control
+
R
-
S
UVLO
TSD
GND
COMP
C12
220 pF
LP
LS3
R2
10 kΩ
LX
C11
GD
Q1 2.2 nF
ISS
R3
0.100 Ω
-
Gm
VA
Amp
+
Soft Ref.
Start
R7
220 kΩ
C13
6.8 nF
R8
1 MΩ
R6
4.7 kΩ
C8
22 F
C9
100 nF
ZD1
4.7 V
C10
100 nF
Optional feedback
resistor
R4
27 kΩ
Anode
84 V
50mA
Grid
58 V
50 mA
Filament
8V
200 mA
R5
330 kΩ
EN 1
COMP 2
VA 3
GND 4
8 VIN
7 LX
6 GD
5 ISS
Pin-out Diagram
Number
1
2
3
4
5
6
7
8
Name
EN
COMP
VA
GND
ISS
GD
LX
VIN
Description
Enable input; active high
Compensation node for Gm amplifier stage
Output voltage feedback input
Ground reference connection; connect to negative terminal of battery supply
MOSFET, Q1, current sense input
MOSFET gate drive output
Regulator switching node: MOSFET drive output
Supply input to power control circuit, MOSFET driver, and reference voltages
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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