A4401KL-T Allegro Microsystems Inc, A4401KL-T Datasheet - Page 3

• Manufacturer Part Number: A4401KL-T
• Description: IC QUASI FLYBACK CONVERTER 8SOIC
• Manufacturer: Allegro Microsystems Inc

Specifications of A4401KL-T

• Display Type: Vacuum Fluorescent (VF)
• Current - Supply: 2.3mA
• Voltage - Supply: 7 V ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Configuration: -
• Digits Or Characters: -

A4401
Enable
COMP
GND
V
7 to 40V
EN
VA
R1
10 kΩ
BAT
C1
1
2
3
4
Optional
EMI Filter
EN
L1
Shutdown
Linear
8
7
6
5
Control
Fault
Logic
VIN
LX
GD
ISS
VIN
C2
Adaptive
turn-on
control
UVLO
TSD
Automotive Quasi-Resonant Flyback Control IC
GND
100 nF
C3
Number
1
2
3
4
5
6
7
8
R
S
Functional Block Diagram
220 pF
C12
COMP
Name
GND
ISS
VIN
EN
GD
COMP
VA
LX
Pin-out Diagram
+
-
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
Soft
Start
220 kΩ
R7
Gm
Amp
C13
6.8 nF
+
-
Ref.
ISS
GD
1 MΩ
LX
VA
R8
LP
0.100 Ω
Q1
R3
LS1
LS2
LS3
2.2 nF
C11
10 kΩ
Description
R6
4.7 kΩ
STPS160U
D3
US1J
D4
D2
US1J
R2
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
ZD1
4.7 V
C4
22 F
C6
22 F
C8
22 F
Optional feedback
resistor
C9
100 nF
C10
100 nF
R4
27 kΩ
100 nF
C5
100 nF
C7
R5
330 kΩ
8 V
200 mA
Filament
84 V
50mA
Anode
Grid
58 V
50 mA
3