ld7578h Leadtrend Technology, ld7578h Datasheet - Page 2

• Manufacturer Part Number: ld7578h
• Description: High Voltage Green-mode Pwm Controller With Over Temperature Protection
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7578H-DS-00 February 2010
PIN
1
2
3
4
5
6
7
8
Part number
The LD7578H is ROHS compliance.
LD7578HGS
LD7578HGN
(-) LATCH
NAME
COMP
GND
OUT
VCC
CS
NC
HV
Protection Mode
OLP/OVP
Latch
Latch
Pulling this pin below 0.95V will shutdown the controller to enter latch mode until the
AC power-on recycles. By connecting a NTC between this pin and ground will
achieve OTP protection function. Let this pin float to disable the latch protection.
Voltage feedback pin (same as the COMP pin in UC384X). Connecting a
photo-coupler will close the control loop and achieve the regulation.
Current sense pin. Connect it to sense 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 shut off
to reduce power loss from the startup circuit.
SOP-8 & DIP-8 (TOP VIEW)
www.leadtrend.com.tw
8
1
TOP MARK
YYWWPP
7
2
SOP-8
DIP-8
6
3
Package
5
4
2
Green
Green
YY:
WW:
PP:
FUNCTION
Year code
Week code
Production code
LD7578HGS
LD7578HGN
Top Mark
3600 /tube /Carton
2500 /tape & reel
LD7578H
Shipping