ld7577ja Leadtrend Technology, ld7577ja Datasheet - Page 2

• Manufacturer Part Number: ld7577ja
• Description: High Voltage Green-mode Pwm Controller With Brown-out Protection
• Manufacturer: Leadtrend Technology

Pin Configuration
Ordering Information
Pin Descriptions
Leadtrend Technology Corporation
LD7577JA-DS-00b November 2009
SOP-8
LD7577JA GR
LD7577JA GN
DIP-8
LD7577JA GS
Part number
Note: The LD7577JA is Green packaged.
1
2
3
4
5
6
7
8
SOP-7
---
1
2
3
4
5
6
8
SOP-8 & DIP-8 (TOP VIEW)
8
1
TOP MARK
YYWWPP
Switching Freq.
NAME
COMP
GND
BNO
OUT
VCC
7
2
CS
NC
HV
65KHz
65KHz
65KHz
6
3
5
4
Brownout Protection Pin. Connect a resistor divider between this pin and
bulk capacitor voltage to set the brownout level. If the voltage is below
threshold voltage, the PWM output will be disabled. The BNO pin also
provides AC over voltage protection. As soon as the voltage is over 4.16V,
the OVP will be tripped and the gate drive will be turned off.
Voltage feedback pin. Through the connection of a photo-coupler, it can
close the control loop and achieve the regulation.
Current sense pin. Connect it 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 UVLO(on), this HV loop
will be turned off to save the power loss of the startup circuit.
www.leadtrend.com.tw
SOP-7 (TOP VIEW)
8
1
Package
TOP MARK
SOP-7
SOP-8
YYWWPP
DIP-8
2
2
6
3
5
4
FUNCTION
YY:
WW:
PP:
LD7577JAGS
LD7577JAGS
LD7577JAGN
Top Mark
Year code
Week code
Production code
LD7577JA
3600 /tube /Carton
2500 /tape & reel
2500 /tape & reel
Shipping