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TPS68000DBT

更新时间： 2024-11-19 04:27:31
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
13页 336K
描述
HIGHLY EFFICIENT PHASE SHIFT FULL BRIDGE CCFL CONTROLLER

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TPS68000DBT 数据手册

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TPS68000  
(6,4 mm x 7,8 mm)  
www.ti.com  
SLVS524–OCTOBER 2005  
HIGHLY EFFICIENT PHASE SHIFT FULL BRIDGE CCFL CONTROLLER  
FEATURES  
DESCRIPTION  
•
8-V to 30-V Input Voltage Range  
•
Full Bridge Topology With Integrated Gate  
Drives for 4 NMOS Switches  
The TPS68000 device provides a power supply  
controller solution for CCFL backlight applications in a  
large variety of applications. The wide input voltage  
range of 8 V to 30 V makes it suitable to be powered  
directly from regulated 12-V or 24-V rails, or any  
other source with output voltages in this range. When  
using a regulated 5-V rail, it also can be used in  
•
•
Synchronizable Constant Frequency  
Operation  
Programmabe Phase Delays of Operating  
Frequency for Master-Slave Operation  
notebook  
computers  
or  
other  
portable  
•
•
•
Lamp Voltage and Lamp Current Regulation  
Analog and Burst Dimming  
battery-powered equipment having lower minimum  
supply voltages. The controller is capable of driving  
the gates of all 4 NMOS switches directly without the  
need for any additional circuitry, like dedicated gate  
drivers or gate-drive transformers. The wide input  
voltage range also makes it easy to design CCFL  
converters with higher input voltages like 120 V or  
400 V coming from a power factor correction unit.  
The TPS68000 also supports CCFL converter circuits  
driving multi-lamp applications, either by using higher  
power-rated switches and transformers, or using  
Configurable Distributed Burst Dimming in  
Multiple Controller Applications  
•
Programmable Voltage Regulation Timeout  
for Startup and Fault Conditions  
•
•
•
•
Open-Lamp and Short-Circuit Protection  
Internal Over-Temperature Protection  
Undervoltage Lockout  
30-pin TSSOP Package  
several  
TPS68000s  
synchronized.  
When  
synchronized, they can be operated either at the  
same frequency and phase, or phase shifted to  
minimize RMS input current. Already implemented  
smart dimming features, such as support of  
distributed dimming, also help to optimize the  
APPLICATIONS  
•
CCFL Backlight Power Supplies for Desktop  
Monitors and LCD TVs  
•
CCFL Backlight Power Supplies for Notebook  
Computers  
performance  
of  
multi-controller  
applications.  
(Continued on next page)  
C
10  
TPS68000  
Supply Voltage  
VCC  
V5A  
GA  
SA  
QC  
QA  
8V .. 30V  
C1  
VLOGIC  
C
3
C12  
R
C
2
14  
Error Output  
FAULT  
V5C  
Synchronization  
C
T
1
SYNC  
4
2.0 V  
GC  
0 V  
Synchronization Phase Shift  
PH  
SC  
SET  
Operating Frequency  
Q
B
QD  
R
1
GB  
GD  
V5  
Device Enable  
EN  
C13  
C
5
C2  
STC  
R4  
R3  
3.3 V  
Lamp current  
0 V  
ABR  
(Analog Dimming Input)  
OCP  
2 V  
CSEN  
Burst Duty Cycle  
0 V  
BBR  
C8  
(Burst Dimming Input)  
CAO  
C
6
BF  
Burst Frequency  
CA−  
VSEN  
VAO  
Direct Burst Dimming Input  
BC  
(Frequency + Duty Cycle)  
C9  
C
7
VREF  
VA−  
GND  
PGND  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCT PREVIEW information concerns products in the  
formative or design phase of development. Characteristic data and  
other specifications are design goals. Texas Instruments reserves  
the right to change or discontinue these products without notice.  
Copyright © 2005, Texas Instruments Incorporated  
1234567...13

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