LD7577JAGR Просмотр технического описания (PDF) - Unspecified

Номер в каталоге

Компоненты Описание

производитель

LD7577JAGR

High Voltage Green-Mode PWM Controller with Brown-Out Protection

Unspecified 

LD7577JA

Pin Configuration

SOP-8 & DIP-8 (TOP VIEW) SOP-7 (TOP VIEW)

8 76 5

TOP MARK

YYWWPP

1 2 34

8

65

TOP MARK

YYWWPP

1 23 4

YY:

WW:

PP:

Year code

Week code

Production code

Ordering Information

Part number

Switching Freq.

Package

Top Mark

Shipping

LD7577JA GR

65KHz

SOP-7

LD7577JAGS

2500 /tape & reel

LD7577JA GS

65KHz

SOP-8

LD7577JAGS

2500 /tape & reel

LD7577JA GN

65KHz

Note: The LD7577JA is Green packaged.

DIP-8

LD7577JAGN 3600 /tube /Carton

Pin Descriptions

SOP-8

DIP-8

1

2

3

4

5

6

7

8

SOP-7 NAME

FUNCTION

Brownout Protection Pin. Connect a resistor divider between this pin and

bulk capacitor voltage to set the brownout level. If the voltage is below

1

BNO 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

2

COMP

close the control loop and achieve the regulation.

3

CS Current sense pin. Connect it to sense the MOSFET current.

4

GND Ground.

5

OUT Gate drive output to drive the external MOSFET.

6

VCC Supply voltage pin.

---

NC Unconnected Pin.

Connect this pin to positive terminal of bulk capacitor to provide the startup

8

HV 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.

Leadtrend Technology Corporation

LD7577JA-DS-00b August 2010

2

www.leadtrend.com.tw

Share Link: