ld7531a Leadtrend Technology, ld7531a Datasheet - Page 2

• Manufacturer Part Number: ld7531a
• Description: Green-mode Pwm Controller With Frequency Trembling And Integrated Protections
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7531A-DS-00 July 2009
(DIP-8)
PIN
8
7
5
4
2
1
LD7531A GL
LD7531A GN
Part number
Note: The LD7531A is ROHS compliant.
(SOT-26)
PIN
1
2
3
4
5
6
DIP-8 (TOP VIEW)
8
1
YY,
WW, W: Week code
P
##
TOP MARK
YYWW##
NAME
COMP
7
2
GND
VCC
OUT
SOT-26
DIP-8
Y : Year code (D: 2004, E: 2005…..)
RT
CS
:
:
6
3
LD75..
(Product family code)
Production code
5
4
www.leadtrend.com.tw
Ground
Voltage feedback pin (same as the COMP pin in UC384X), By connecting
a photo-coupler to close the control loop and achieve the regulation.
This pin is to program the switching frequency. By connecting a resistor
to ground to set the switching frequency.
Current sense pin, connect to sense the MOSFET current
Supply voltage pin
Gate drive output to drive the external MOSFET
Package
Green Package
Green Package
2
YWP/31A
LD7531AGN
TOP MARK
FUNCTION
GND COMP
SOT-26 (TOP VIEW)
OUT
6
1
YWP
VCC
5
2
31A
3000 /tape & reel
3600 /tube /Carton
CS
RT
3
4
Shipping
LD7531A