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ADTech
ADTech

ADT7110 Datasheet Preview

ADT7110 Datasheet

fixed frequency step-down converter

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ADT7110 pdf
ADT7110
General Description
The ADT7110 is a fixed frequency step-down
converter designed to drive Infrared LEDs in the
CCD camera module application.
And internal current limit circuit protect external
devices.
654
A11
123
Package outline of the ADT7110
Features
Applications
• Input voltage range : 10.5V to 15V
• Infrared LED driver for CCD camera
• Current mode PWM controller with
integrated compensation components
• 350mA output load current available
• Built-in chip enable/disable function
• Built-in current limit protection
• 500kHz fixed frequency internal oscillator
• Small outline SOT-26 package (2.9mm x 1.6mm body)
Typical Application Circuit
VOUT
RSE
RFB1a
RFB1b
RFB1c
RFB1d
RFB1e
RFB1f
RFB2
L1
C1
U1
RS
GND
PWM
VIN
EN
FB
VIN
C2
EN
VFB
* This specifications are subject to be changed without notice
Jun. 07. 2008 / Rev. 0.1
1/8 http://www.ad-tech.co.kr
www.DataSheet.in



ADTech
ADTech

ADT7110 Datasheet Preview

ADT7110 Datasheet

fixed frequency step-down converter

No Preview Available !

ADT7110 pdf
ADT7110
Part List
Component
U1*1
L1
C1
C2
RSE
RLED1 ~ RLED6*2
RFB1a ~ RFB1f
RFB2*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
Type
IC
Chip inductor
Tantalum capacitor
Tantalum capacitor
Chip resistor
Chip resistor , 1%
Chip resistor
Chip resistor , 1%
Value
FP103
47uH/590mA
47uF/16V
10uF/25V
0.1
4.0
120(table 3)
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.
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
Parameter
Ratings
Collector to Emitter Voltage
PNP
Collector Current
-23
-2
Schottky
Barrier Diode
Repetitive Peak Reverse Voltage
Average Rectified Current
30
700
Unit Remarks
V Recommend
A ‘2SB1706’ by ROHM or Equivalent IC
V Recommend
mA ‘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
www.DataSheet.in


Part Number ADT7110
Description fixed frequency step-down converter
Maker ADTech
Total Page 8 Pages
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