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User's Guide
SLVU823–December 2012
User's Guide for the TPS92641EVM
This user's guide describes the characteristics, operation, and use of the TPS92641 evaluation module
(EVM). This EVM contains Texas Instruments' TPS92641 IC configured as a WLED power solution
providing a single-channel regulated current output to drive 10 LEDs connected in series running at 1 A.
This EVM accepts logic level PWM dimming or analogy dimming control input. A high-efficiency single-
inductor synchronous step-down (buck) converter topology is used. The current output is ideal for driving a
WLED light bar in architecture lighting applications. This user's guide includes the EVM specifications, a
schematic diagram, PCB layout artworks, recommended test setup and bill of materials to help the end
user to implement the device in their specific application.
Contents
1 Applications .................................................................................................................. 2
2 TPS92641EVM Electrical Performance Specifications ................................................................ 2
3 Schematic and Bill of Materials ........................................................................................... 3
4 Connector Descriptions .................................................................................................... 5
4.1 Input Connections .................................................................................................. 5
4.2 Output Connections ................................................................................................ 6
4.3 Test Point Connections ........................................................................................... 6
5 Test Requirements and Setup ............................................................................................ 7
5.1 Hardware Requirements .......................................................................................... 7
5.2 Hardware Setup .................................................................................................... 7
6 Typical Waveforms ......................................................................................................... 8
7 TPS92641EVM Assembly Drawings and PCB Layout ............................................................... 10
List of Figures
1 TPS92641EVM Schematic ................................................................................................ 3
2 TPS92641EVM Connector Descriptions................................................................................. 5
3 Test Connection Diagram of the TPS92641EVM....................................................................... 7
4 Waveforms of Power-up Transient of TPS92641EVM with V
IN
= 48 V
DC
........................................... 8
5 Waveforms of Steady State Operation of TPS92641EVM with V
IN
= 48 V
DC
....................................... 9
6 Waveforms of UDIM Operation of the TPS92641EVM with V
IN
= 48 V
DC
........................................... 9
7 TPS92641EVM PCB Top View with Component Legend............................................................ 10
8 TPS92641EVM PCB Top View.......................................................................................... 10
9 TPS92641EVM PCB Bottom View...................................................................................... 11
List of Tables
1 TPS92641EVM Electrical and Performance Specifications........................................................... 2
2 Bill of Materials ............................................................................................................. 4
3 Hardware Requirements for EVM Evaluation ........................................................................... 7
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SLVU823–December 2012 User's Guide for the TPS92641EVM
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