ld7552 Leadtrend Technology, ld7552 Datasheet - Page 2

• Manufacturer Part Number: ld7552
• Description: Green-mode Pwm Controller
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7552-DS-00 February, 2005
PIN
1
2
3
4
5
6
7
8
Part number
COMP
LD7552 BS
LD7552 BN
NAME
LD7552 IS
LD7552 IN
GND
VCC
VCC
OUT
NC
CS
RT
Ground
Voltage feedback pin (same as the COMP pin in UC384X), By connecting a
photo-coupler to close the control loop and achieve the regulation.
Supply voltage pin
This pin is to program the switching frequency. By connecting a resistor to ground
to set the switching frequency.
Unconnected pin
Current sense pin, connect to sense the MOSFET current
Supply voltage pin
Gate drive output to drive the external MOSFET
SOP-8 & DIP-8 (TOP VIEW)
8
1
SOP-8 (PB Free)
DIP-8 (PB Free)
TOP MARK
YYWWPP
7
Package
2
SOP-8
DIP-8
6
3
5
4
YY: Year code (D: 2004, E: 2005…..)
WW: week code
PP: production code
2
TOP MARK
LD7552BS
LD7552BN
LD7552IS
LD7552IN
FUNCTION
2500 /tape & reel
2500 /tape & reel
3600 /tube /carton
3600 /tube /carton
Shipping
LD7552