ld7575b Leadtrend Technology, ld7575b Datasheet - Page 2

• Manufacturer Part Number: ld7575b
• Description: Green-mode Pwm Controller With High-voltage Start-up Circuit
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7575B-DS-00 May 2008
PIN
1
2
3
4
5
6
7
8
The LD7575B is ROHS Complaint.
Part number
LD7575B GS
LD7575B GN
LD7575B PS
LD7575B PN
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), By 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 (Green PK)
SOP-8 & DIP-8 (TOP VIEW)
DIP-8 (Green PK)
SOP-8 (Pb Free)
DIP-8 (Pb Free)
8
1
TOP MARK
Package
YYWWPP
7
2
6
3
5
4
2
YY:
WW:
PP:
LD7575BGN
LD7575BGS
LD7575BPN
LD7575BPS
FUNCTION
Top Mark
Year code
Week code
Production code
3600 /tube /Carton
3600 /tube /Carton
2500 /tape & reel
2500 /tape & reel
Shipping
LD7575B