ld7575a Leadtrend Technology, ld7575a Datasheet - Page 2

• Manufacturer Part Number: ld7575a
• Description: Green-mode Pwm Controller With High-voltage Start-up Circuit
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7575A-DS-00a November 2007
PIN
1
2
3
4
5
6
7
8
LD7575A PS
LD7575A GS
LD7575A PN
The LD7575A is ROHS Complaint/ Green Package.
Part number
COMP
NAME
GND
OUT
VCC
RT
CS
NC
HV
This pin is to program the switching frequency. By connecting a resistor to ground
to set the switching frequency.
Voltage feedback pin (same as the COMP pin in UC384X), connecting a
photo-coupler to close the control loop and achieve the regulation.
Ground
Gate drive output to drive the external MOSFET
Unconnected Pin
Connect this pin to positive terminal of bulk capacitor to provide the startup current
for the controller. When Vcc voltage trips the UVLO(on), this HV loop will be off to
save the power loss on the startup circuit.
Current sense pin, connect to sense the MOSFET current
Supply voltage pin
SOP-8
SOP-8
DIP-8
www.leadtrend.com.tw
SOP-8 & DIP-8 (TOP VIEW)
8
1
TOP MARK
YYWWPP
7
2
Package
PB Free
Green Package
PB Free
6
3
5
4
2
YY:
WW:
PP:
FUNCTION
LD7575AGS
LD7575APS
LD7575APN
Year code
Week code
Production code
Top Mark
3600 /tube /Carton
2500 /tape & reel
2500 /tape & reel
Shipping
LD7575A