ld7576a Leadtrend Technology, ld7576a Datasheet - Page 2

• Manufacturer Part Number: ld7576a
• Description: Green-mode Pwm Controller With High-voltage Start-up Circuit And Adjustable Olp Delay Time
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7576A-DS-00b November, 2009
PIN
1
2
3
4
5
6
7
8
The LD7576A is ROHS compliant/ Green Package.
LD7576A GR
LD7576A GS
LD7576A GN
Part number
COMP
NAME
GND
OUT
VCC
NC
HV
CT
CS
SOP-7 (TOP VIEW)
8
1
This pin is to program the frequency of a lower frequency timer. Connecting a
capacitor to ground sets the OLP delay time.
Voltage feedback pin (same as the COMP pin in UC384X). Connecting a
photo-coupler closes the control loop to achieve the regulation. A high quality
ceramic capacitor (X7R), with capacitance of 102pF at least, is required for general
applications.
Current sense pin, for sensing the MOSFET current.
Ground.
Gate drive output to drive an external MOSFET.
Supply voltage pin.
Unconnected Pin.
Connect this pin to a positive terminal of a bulk capacitor to provide the startup
current for the controller. When Vcc voltage trips up to the UVLO(on), this HV loop
will be off to save the power loss on the startup circuit.
TOP MARK
YYWWPP
2
6
3
www.leadtrend.com.tw
5
4
Package
SOP-7
SOP-8
DIP-8
SOP-8, D IP-8 (TOP VIEW)
SOP-8, D IP-8 (TOP VIEW)
8
8
1
1
LD7576AGS
TOP MARK
YYWWPP
YYWWPP
7
7
2
2
6
6
3
3
2
5
5
4
4
FUNCTION
LD7576AGR
LD7576AGN
LD7576AGS
Top Mark
YY:
WW:
PP:
Year code
Week code
Production code
3600 /tube /Carton
2500 /tape & reel
2500 /tape & reel
Shipping
LD7576A