APW7071 データシートの表示（PDF） - Anpec Electronics

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APW7071

White LED DC/DC Step-Up Converter

Anpec Electronics 

APW7071

Block Diagram

OVP(5)

VIN(6)

FB(3)

Under

Voltage

Lockout

400ns Min.

off-time

Error

Comparator

-

+

Vref=0.25V

Thermal

Shutdown

Control

Logic

OVP

-

+

Gate

Driver

SW(1)

N-MOSFET

6us Max.

on-time

SHDN(4)

Current Limit

+

-

Soft

start

RSENSE

GND(2)

Pin Description

No

Name

1

SW

2

GND

3

FB

4

SHDN

5

OVP

6

Vin

Function

Switch Pin. Connect to inductor/diode here. Minimize trace area at this

pin to educe EMI.

Ground Pin.

Feedback Pin. Reference voltage is 0.25V. Connect cathode of

lowest LED and resistor here. Calculate resistor value according to

RFB = 0.25V/l LED

Shutdown Pin. Tie to 1.3V or higher to enable device, 0.4V or less to

disable.

Over voltage protection sense pin. Connect this pin to VOUT for over

voltage protection.

Supply voltage Pin.

Copyright © ANPEC Electronics Corp.

2

Rev. A.1 - Feb., 2006

www.anpec.com.tw

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