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