lc5511d Allegro MicroSystems, Inc., lc5511d Datasheet - Page 3

• Manufacturer Part Number: lc5511d
• Description: Single-stage Power Factor Corrected Off-line Switching Regulator Ic
• Manufacturer: Allegro MicroSystems, Inc.

LC5511D
S/GND
COMP
VCC
OCP
Pin-out Diagram
1
2
3
4
8
6
5
D/ST
ISENSE
NF
OCP
LC5511D Terminal List Table
3
Number
1
2
3
4
5
6
7
8
Reg
Detection
VCC
OVP
OCP
Bottom
2
ISENSE
S/GND
COMP
Name
D/ST
VCC
OCP
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.
NF
–
LEB
Thermal
Shutdown
MOSFET source and GND terminal for the Controller chip
Supply voltage input
Overcurrent Protection and quasi-resonant signal input terminal
Feedback phase-compensation input
No function; must be externally connected to S/GND pin with as short
a trace as possible, for stable operation of the device
Output current sensing voltage input
Pin removed
MOSFET drain terminal and input of the startup current
OSC
UVLO
Single-Stage Power Factor Corrected
Bias
Reg
Feedback
Control
Off-Line Switching Regulator IC
S
R
Q
Startup
OLP
Function
Controller Chip
OTA
Drv
8
1
6
4
D/ST
S/GND
ISENSE
COMP
3