herunterladen
1 Introduction
User's Guide
SLVU164A – November 2006 – Revised March 2007
TPS68000EVM-161
This user’s guide describes the characteristics, operation, and use of the
TPS68000EVM evaluation module (EVM). This EVM is designed to help the user easily
evaluate and test the operation and functionality of the TPS68000. This document
includes setup instructions for the hardware, a schematic diagram, a bill of materials
(BOM), and PCB layout drawings for the EVM.
Contents
1 Introduction .......................................................................................... 1
2 Setup and Results .................................................................................. 2
3 Board Layout ........................................................................................ 7
4 Schematic and Bill of Materials ................................................................. 10
List of Figures
1 Turn ON Into 330-mm Lamp, Voltage at 500 V/div ............................................ 4
2 Output Voltage and Vsen Test Point 14, Divide Ratio 1:820 ................................. 5
3 Output Current and Csen Test Point 13, Divide Ratio 1 V:2.55 mA ......................... 6
4 Burst Dimming Current at 50% Duty Cycle ..................................................... 7
5 Assembly Layer ..................................................................................... 8
6 Top Layer Routing .................................................................................. 9
7 Bottom Layer Routing ............................................................................ 10
8 TPS68000EVM-161, U1 Schematic ............................................................ 11
9 TPS68000EVM-161, U2 Schematic ............................................................ 12
List of Tables
1 Performance Specification Summary ............................................................ 2
2 U1 With 300-mm Lamp ............................................................................ 6
3 U2 With 360-mm Lamp ............................................................................ 6
4 TPS68000EVM-161 Bill of Materials ........................................................... 13
The Texas Instruments TPS68000EVM-161 evaluation module (EVM) helps designers evaluate the
operation and performance of the TPS68000 cold cathode fluorescent lamp (CCFL) controller. The
TPS68000EVM-161 EVM is a fully functional DC/AC inverter module used to drive a single CCFL lamp.
The upper section demonstrates a small layout whereas the larger lower section allows access to all
features of the TPS68000. This EVM operates from an input supply of 8 V to 22 V and generates up to
600 Vrms at 6 mArms. Lamp current is fixed at 6 mArms by resistor value, and output voltage is
determined by CCFL. This output is typical of a 300-mm length CCFL, reference JKL Components
BF3300-208.
Note: As with all CCFL inverters, high AC voltages are present on outputs, and care should be
taken to avoid shock hazards and equipment damage.
SLVU164A – November 2006 – Revised March 2007 TPS68000EVM-161 1
Submit Documentation Feedback
Verzeichnis
