LD7575
Pin Configuration
SOP-8 & DIP-8 (TOP VIEW)
8
7
6
5
YY:
Year code
TOP MARK
YYWWPP
WW:
PP:
Week code
Production code
1
2
3
4
Ordering Information
Part number
Package
Top Mark
Shipping
LD7575 PS
SOP-8
LD7575PS
LD7575PN
2500 /tape & reel
3600 /tube /Carton
LD7575 PN
DIP-8
The LD7575 is ROHS compliant.
Pin Descriptions
PIN
NAME
FUNCTION
This pin is to program the switching frequency. By connecting a resistor to ground
to set the switching frequency.
1
RT
Voltage feedback pin (same as the COMP pin in UC384X), By connecting a
photo-coupler to close the control loop and achieve the regulation.
Current sense pin, connect to sense the MOSFET current
Ground
2
COMP
3
4
5
6
7
CS
GND
OUT
VCC
NC
Gate drive output to drive the external MOSFET
Supply voltage pin
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.
8
HV
2
Leadtrend Technology Corporation
LD7575-DS-04a June 2007
ETC [ ETC ]
