ADT7110 ADTech, ADT7110 Datasheet - Page 2

• Manufacturer Part Number: ADT7110
• Description: fixed frequency step-down converter
• Manufacturer: ADTech

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