Texas Instruments TPS61181(82/81A)-259 Evaluation Board TPS61181(82/81A)EVM-259 TPS61181AEVM-259 TPS61181AEVM-259 Manuale Utente
Codici prodotto
TPS61181AEVM-259
User
'
s Guide
SLVU223B
–
February 2008
–
Revised May 2011
TPS61181EVM-259 / TPS61182EVM-259
This user's guide describes the characteristics, operation, and use of the TPS6118xEVM-259 evaluation
module (EVM). This EVM contains either Texas Instruments' TPS61181 (-001 build) or TPS61182 (-002
build) or TPS61181A (-003 build)-based WLED power solutions, each of which provides up to six
independently regulated current outputs using a single inductor step-up (boost) converter. The current
outputs are ideal for driving a WLED backlight in notebook/laptop computers. A separate EVM,
WLEDEVM-260, contains eight strings of 10 series WLEDs and connects to the TPS6118x EVMs via a
14-pin ribbon cable to simplify evaluation. This user's guide includes EVM specifications, recommended
test setup, test results, bill of materials, and a schematic diagram for the TPS61181/2/1AEVM.
module (EVM). This EVM contains either Texas Instruments' TPS61181 (-001 build) or TPS61182 (-002
build) or TPS61181A (-003 build)-based WLED power solutions, each of which provides up to six
independently regulated current outputs using a single inductor step-up (boost) converter. The current
outputs are ideal for driving a WLED backlight in notebook/laptop computers. A separate EVM,
WLEDEVM-260, contains eight strings of 10 series WLEDs and connects to the TPS6118x EVMs via a
14-pin ribbon cable to simplify evaluation. This user's guide includes EVM specifications, recommended
test setup, test results, bill of materials, and a schematic diagram for the TPS61181/2/1AEVM.
Contents
1
Introduction
..................................................................................................................
2
Input/Output Connector Descriptions
.....................................................................................
3
Board Layout
................................................................................................................
4
Schematic and Bill of Materials
...........................................................................................
List of Figures
1
Efficiency vs Total WLED Output Current
..............................................................................
2
Dimming Linearity
...........................................................................................................
3
Start-up
.......................................................................................................................
4
Switching Waveform
........................................................................................................
5
Output Ripple at PWM Dimming with C
O
= 4.7
μ
F
......................................................................
6
Top Assembly Layer
........................................................................................................
7
Top Layer
....................................................................................................................
8
Bottom Layer
................................................................................................................
9
HPA259A Schematic
.......................................................................................................
List of Tables
1
Typical Performance Specification Summary
...........................................................................
2
HPA259 Bill of Materials
..................................................................................................
1
SLVU223B
–
February 2008
–
Revised May 2011
TPS61181EVM-259 / TPS61182EVM-259
Copyright
©
2008
–
2011, Texas Instruments Incorporated