LD7575
Pin Configuration
SOP-8 (TOP VIEW)
VCC
6
8
7
OUT
5
NC
HV
TOP MARK
YYWWPP
1
2
3
4
YY:
WW:
PP:
Year code
Week code
Production code
COMP
Ordering Information
Part number
LD7575 CS
LD7575 PS
Package
SOP-8
SOP-8 (PB Free)
Top Mark
LD7575CS
LD7575PS
Shipping
2500 /tape & reel
2500 /tape & reel
Pin Descriptions
PIN
1
2
3
4
5
6
7
8
NAME
RT
COMP
CS
GND
OUT
VCC
NC
HV
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.
Current sense pin, connect to sense the MOSFET current
Ground
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.
FUNCTION
This pin is to program the switching frequency. By connecting a resistor to ground
GND
CS
RT
2
Leadtrend Technology Corporation
LD7575-DS-01-PROMATE July 2005
ETC [ ETC ]
