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1 Introduction
2 Setup
2.1 Input/Output Connector Descriptions
2.1.1 J1 –VIN
User's Guide
SLVU182 – September 2006
TPS75105EVM
This user’s guide describes the characteristics, operation, and use of the
TPS75105EVM-174 evaluation module (EVM). The EVM demonstrates the Texas
Instruments TPS75105 low-dropout, two-bank LED driver with PWM brightness control.
The document Includes setup instructions, a schematic diagram, a bill of materials, and
PCB layout drawings for the EVM.
Contents
1 Introduction .......................................................................................... 1
2 Setup ................................................................................................. 1
3 Board Layout ........................................................................................ 3
4 Schematic and Bill of Materials ................................................................... 6
List of Figures
1 Assembly Layer ..................................................................................... 4
2 Top Layer Routing .................................................................................. 5
3 Bottom Layer Routing .............................................................................. 6
4 TPS75105EVM-174 Schematic ................................................................... 7
List of Tables
1 TPS75105EVM-174 Bill of Materials ............................................................. 7
The Texas Instruments TPS75105EVM-174 evaluation module (EVM) helps designers evaluate the
operation and performance of the TPS75105 low-dropout linear regulator (LDO), two-bank LED driver with
PWM dimming. The TPS75100 contains four, current-regulated, LED driver outputs and operates from a
2.7-V to 5.5-V input supply. The IC drives the anodes of two banks of two LEDs. Each bank is enabled
independently and can be dimmed using a PWM signal to the EN pin. The LED current is programmed
using a resistor from ISET to GND. The EVM has jumpers for both EN input pins for easy evaluation. The
LDO topology and the 9-ball chip scale package provide a small-footprint solution for battery-powered LED
driver applications.
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS75105EVM-174.
This is the positive input voltage connection to the converter. The EVM operates from any supply voltage
between 2.7 V and 5.5 V. The leads to the input supply should be twisted and kept as short as possible to
minimize EMI transmission and input voltage droop.
SLVU182 – September 2006 TPS75105EVM 1
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