lc5523f Allegro MicroSystems, Inc., lc5523f Datasheet - Page 3

• Manufacturer Part Number: lc5523f
• Description: Single-stage Power Factor Corrected Off-line Switching Regulator Ic
• Manufacturer: Allegro MicroSystems, Inc.

LC5523F
S/GND
S/GND
D/ST
D/ST
VCC
OCP
OVP
OCP
VCC
OVP
Pin-out Diagrams
NC
NC
FB
FB
2
3
4
6
2
4
6
1
5
7
1
3
5
7
1
2
3
4
5
6
7
(LF 3051)
(LF 3052)
OVP
OCP
D/ST
S/GND
NC
VCC
OCP
FB
OVP
7
5
(LF 3054)
Reg
LC5523F Terminal List Table
Number
Detection
OVP
VCC
OCP
Bottom
1
2
3
4
5
6
7
4
LEB
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Functional Block Diagram
Functional Block Diagram
Functional Block Diagram
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
S/GND
Name
D/ST
VCC
OCP
OVP
NC
FB
Thermal
Shutdown
OSC
MOSFET drain terminal and input of the startup current
MOSFET source and GND terminal for the Controller chip
No connection
Supply voltage input
Overcurrent protection and quasi-resonant signal input terminal
Feedback signal input and Overload Protection (OLP) signal input
Overvoltage Protection (OVP) signal input
UVLO
Single-Stage Power Factor Corrected
Bias
Reg
Feedback
Control
S
R
Q
Startup
Off-Line Switching Regulator IC
OLP
Controller Chip
Function
Drv
2
6
1
S/GND
D/ST
FB
3