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User's Guide
SLVU851B–April 2013–Revised September 2013
TPS61261EVM-208 Evaluation Module
This user’s guide describes the characteristics, operation, and use of the TPS61261EVM-208 evaluation
module (EVM). This EVM contains TI's TPS61261 boost converter, configured with external components
to regulate current through an LED. This user’s guide includes EVM specifications, recommended test
setup, test results, bill of materials, and a schematic diagram.
Contents
1 Introduction .................................................................................................................. 2
1.1 Performance Specification Summary ............................................................................ 2
1.2 Modifications ........................................................................................................ 2
2 TPS61261EVM-208 Setup ................................................................................................. 2
2.1 J1 – V
IN
.............................................................................................................. 2
2.2 J2 – Sense + and – ................................................................................................ 2
2.3 J3 – GND ............................................................................................................ 2
2.4 J4 – VLED .......................................................................................................... 2
2.5 J5 – Sense + and – ................................................................................................ 2
2.6 J6 – GND ............................................................................................................ 2
2.7 J7 - Analog Dimming and GND .................................................................................. 2
2.8 JP1 - Enable ........................................................................................................ 3
2.9 JP2 + and – ......................................................................................................... 3
3 Setting the LED Current .................................................................................................... 3
3.1 Analog Dimming .................................................................................................... 3
3.2 PWM Dimming ..................................................................................................... 3
4 Test Results ................................................................................................................. 4
5 Board Layout ................................................................................................................ 6
6 Schematic and Bill of Materials ........................................................................................... 9
6.1 TPS61261EVM-208 Schematic .................................................................................. 9
6.2 TPS61261EVM-208 Bill of Materials ........................................................................... 10
List of Figures
1 Analog Dimming Efficiency Versus LED Current ....................................................................... 4
2 Analog Dimming Voltage Versus LED Current .......................................................................... 4
3 PWM Dimming Efficiency Versus LED Current......................................................................... 5
4 PWM Dimming Duty Cycle Versus LED Current ....................................................................... 5
5 Top Silkscreen Layer....................................................................................................... 6
6 Top Layer .................................................................................................................... 7
7 Bottom Layer ................................................................................................................ 7
8 Copper Pour Outline........................................................................................................ 8
List of Tables
1 Typical Performance Specification Summary ........................................................................... 2
2 Bill of Materials............................................................................................................. 10
1
SLVU851B–April 2013–Revised September 2013 TPS61261EVM-208 Evaluation Module
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