Jun. 07. 2008 / Rev. 0.1

ADT7110

2/8

* This specifications are subject to be changed without notice

http://www.ad-tech.co.kr

Part List

Component

Description

Type

Value

Composite type with a PNP transistor

and schottky barrier diode

IC

FP103

L1

Output filter inductor

Chip inductor

47uH/590mA

C1

Output filter capacitor

Tantalum capacitor

47uF/16V

C2

Bypass capacitor

Tantalum capacitor

10uF/25V

R

SE

Current sense resistor

Chip resistor

0.1Ω

R

*2

LED current ballast resistor

Chip resistor , 1%

4.0Ω

R

Buck converter feedback loop

component

Chip resistor

120㏀ (table 3)

R

FB2

*3

Buck converter feedback loop

component

Chip resistor , 1%

68㏀ (table 2)

*1 : For cost down , it is possible to use discrete component with a PNP transistor and a schottky barrier diode.

In this case, you make use the discrete components with proper electrical specification.

*2, *3 : To setting appropriate LED current, Refer to ‘Application Hints’.

Component

Parameter

Ratings

Unit

Remarks

PNP

Collector to Emitter Voltage

-23

V

Recommend

‘2SB1706’ by ROHM or Equivalent IC

Collector Current

-2

A

Schottky

Barrier Diode

Repetitive Peak Reverse Voltage

30

V

Recommend

‘RSX101M-30’ by ROHM or Equivalent

Average Rectified Current

700

mA