TPS65140PWP
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器件描述：TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
器件厂商：TI [
Texas Instruments]
厂商主页：http://www.ti.com/
文件大小：1552.55KB
文件页数：31
PDF阅读：TPS65140PWP.pdf (点击阅读器件资料)
摘要：
www.ti.com
FEATURES DESCRIPTION
APPLICATIONS
Vin V 1
U
o
p to 15 V / 400 mA
V 3
U
o
p to 30 V / 20 mA
V 2
U
o
p to 12 V / 20 mA
V 4
3.3
o
V
Vcom
Boost
Converter
Positive Charge
Pump
Negative
Charge Pump
Vcom Buffer
Linear Regulator
Controller
TPS6514x
2.7 V to 5.8 V
TPS65140 , TPS65141
TPS65145
SLVS497C – SEPTEMBER 2003 – REVISED APRIL 2006
TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD
? 2.7-V to 5.8-V Input Voltage Range The TPS6514x series offers a compact and small
power supply solution to provide all three voltages? 1.6-MHz Fixed Switching Frequency
required by thin film transistor (TFT) LCD displays.? 3 Independent Adjustable Outputs
The auxiliary linear regulator controller can be used? Main Output up to 15 V With <1% Typical
to generate a 3.3-V logic power rail for systemsOutput Voltage Accuracy
powered by a 5-V supply rail only.
? Virtual Synchronous Converter Technology The main output V
O 1 is a 1.6-MHz fixed frequency? Negative Regulated Charge Pump Driver V
O 2 PWM boost converter providing the source drive
voltage for the LCD display. The device is available? Positive Charge Pump Converter V O 3
in two versions with different internal switch current? Auxiliary 3.3-V Linear Regulator Controller
limits to allow the use of a smaller external inductor? Internal Soft Start
when lower output power is required. The
TPS65140/41 has a typical switch current limit of 2.3? Internal Power-On Sequencing
A and the TPS65145 has a typical switch current? Fault Detection of all Outputs (TPS65140/45)
limit of 1.37 A. A fully integrated adjustable charge? No Fault Detection (TPS65141)
pump doubler/tripler provides the positive LCD gate
drive voltage. An externally adjustable negative? Thermal Shutdown
charge pump provides the negative gate drive? System Power Good
voltage. Due to the high 1.6-MHz switching? Available in TSSOP-24 and QFN-24
frequency of the charge pumps, inexpensive andPowerPAD ? Packages
small 220-nF capacitors can be used.
Additionally, the TPS6514x series has a system
power good output to indicate when all supply rails? TFT LCD Displays for Notebooks
are acceptable. For LCD panels powered by 5 V the? TFT LCD Displays for Monitors
device has a linear regulator controller using an
external transistor to provide a regulated 3.3 V? Portable DVD Players
output for the digital circuits. For maximum safety,? Tablet PCs
the TPS65140/45 goes into shutdown as soon as? Car Navigation Systems
one of the outputs is out of regulation. The device? Industrial Displays
can be enabled again by toggling the input or the
enable (EN) pin to GND. The TPS65141 does not
enter shutdown when one of its outputs is below its
power good threshold.
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. Copyright ? 2003 – 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
