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TPS65105

更新时间： 2024-09-27 22:52:55
品牌 Logo 应用领域
德州仪器 - TI 稳压器输出元件
页数 文件大小 规格书
25页 804K
描述
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER

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TPS65105 数据手册

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TPS65100  
TPS65105  
www.ti.com  
SLVS496B–SEPTEMBER 2003–REVISED MARCH 2004  
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER  
FEATURES  
DESCRIPTION  
•
•
•
•
2.7-V to 5.8-V Input Voltage Range  
1.6-MHz Fixed Switching Frequency  
3 Independent Adjustable Outputs  
The TPS65100/05 offers a compact and small power  
supply solution that provides all three voltages  
required by thin film transistor (TFT) LCD displays.  
The auxiliary linear regulator controller can be used  
to generate a 3.3-V logic power rail for systems  
powered by a 5-V supply rail only.  
Main Output of up to 15 V With < 1% Output  
Voltage Accuracy  
•
•
•
•
•
•
•
•
•
Negative Output Voltage Down to -12 V/20 mA  
Positive Output Voltage up to 30 V/20 mA  
Integrated VCOM Buffer  
The main output, Vo1, is a 1.6-MHz, fixed-frequency  
PWM boost converter providing the source drive  
voltage for the LCD display. The device is available in  
two versions with different internal switch current  
limits to allow the use of a smaller external inductor  
when lower output power is required. The TPS65100  
has a typical switch current limit of 2.3 A, and the  
TPS65105 has a typical switch current limit of 1.37 A.  
Auxiliary 3.3-V Linear Regulator Controller  
Internal Soft Start  
Internal Power-On Sequencing  
Fault Detection of all Outputs  
Thermal Shutdown  
A
fully integrated adjustable charge pump  
doubler/tripler provides the positive LCD gate drive  
voltage. An externally adjustable negative charge  
pump provides the negative gate drive voltage. Due  
to the high 1.6-MHz switching frequency of the  
charge pumps, inexpensive and small 220-nF capaci-  
tors can be used.  
Available in TSSOP-24 and QFN-24  
PowerPAD™ Packages  
APPLICATIONS  
•
•
•
•
•
•
TFT LCD Displays for Notebooks  
TFT LCD Displays for Monitors  
Portable DVD Players  
Tablet PCs  
Car Navigation Systems  
Industrial Displays  
The TPS65100/05 has an integrated VCOM buffer to  
power the LCD backplane. For LCD panels powered  
by 5 V only, the TPS65100/05 has a linear regulator  
controller using an external transistor to provide a  
regulated 3.3-V output for the digital circuits. For  
maximum safety, the entire device goes into shut-  
down as soon as one of the outputs is out of  
regulation. The device can be enabled again by  
toggling the input or the enable (EN) pin to GND.  
TPS65100/05  
Vo1  
Vin  
Boost  
Up to 15 V / 400 mA  
2.7 V to 5.8 V  
Converter  
Vo3  
Positive Charge  
Pump  
Up to 30 V / 20 mA  
Negative  
Charge Pump  
Vo2  
Up to −12 V / 20 mA  
Vcom  
Vcom Buffer  
Vo4  
3.3 V  
Linear Regulator  
Controller  
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.  
PowerPAD is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2004, Texas Instruments Incorporated  
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