ADT7110
Part List
Component
U1
*1
L1
C1
C2
R
SE
R
LED1
~ R
LED6*2
R
FB1a
~ R
FB1f
R
FB2*3
Description
Composite type with a PNP transistor
and schottky barrier diode
Output filter inductor
Output filter capacitor
Bypass capacitor
Current sense resistor
LED current ballast resistor
Buck converter feedback loop
component
Buck converter feedback loop
component
IC
Chip inductor
Tantalum capacitor
Tantalum capacitor
Chip resistor
Chip resistor , 1%
Chip resistor
Chip resistor , 1%
Type
FP103
47uH/590mA
47uF/16V
10uF/25V
0.1Ω
4.0Ω
120㏀ (table 3)
68㏀ (table 2)
Value
*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.
Table A
shows the required key electrical limits. It is recommended to use PNP and schottky barrier diode
having equivalent specification in the
Table A.
*2, *3 : To setting appropriate LED current, Refer to ‘Application Hints’.
Table A
: Selection guide for the discrete components
Component
PNP
Collector Current
Schottky
Barrier Diode
Repetitive Peak Reverse Voltage
Average Rectified Current
-2
30
700
A
V
mA
Parameter
Collector to Emitter Voltage
Ratings
-23
Unit
V
Remarks
Recommend
‘2SB1706’ by ROHM or Equivalent IC
Recommend
‘RSX101M-30’ by ROHM or Equivalent
* This specifications are subject to be changed without notice
Jun. 07. 2008 / Rev. 0.1
2/8
http://www.ad-tech.co.kr
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