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See Technical Specifications

TPS65105PWPR

4-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim, Fault & VCOM

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TPS65105PWPR
Datasheet:

TPS65105PWPR Datasheet (PDF)
Display type:

LCD unipolar
IC integration:

LCD bias, VCOM
Vin (min) (V):

2.7
Vin (max) (V):

5.8
EDA/CAD Models:

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TPS65105PWPR General Description

The TPS6510x series 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.

The main output V_O1, 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 TPS65100/01 has a typical switch current limit of 2.3 A, and the TPS65105 has a typical switch current limit of 1.37 A. 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 capacitors can be used.

The TPS6510x series has an integrated VCOM buffer to power the LCD backplane. For LCD panels powered by 5 V only, the TPS6510x series 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 TPS65100/05 goes into shutdown 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. The TPS65101 does not enter shutdown when one of the outputs is below its power good threshold.

Key Features

2.7-V to 5.8-V Input Voltage Range
1.6-MHz Fixed Switching Frequency
3 Independent Adjustable Outputs
Boost Converter Output Voltage V_O1 of up to 15 V With < 1% Output Voltage Accuracy
Negative Regulated Charge Pump V_O2
Positive Charge Pump V_O3
Integrated VCOM Buffer
Virtual Synchronous Converter Technology in Boost Converter
Auxiliary 3.3-V Linear Regulator Controller
Internal Soft Start
Internal Power-On Sequencing
Fault Detection of all Outputs (TPS65100/05)
No Fault Detection (TPS65101)
Thermal Shutdown
Available in TSSOP-24 and VQFN-24 PowerPAD™ Packages

Specifications

Display type	LCD unipolar	IC integration	LCD bias, VCOM
Vin (min) (V)	2.7	Vin (max) (V)	5.8
Applications	7 inches or less, 7 to 13 inches	Source driver voltage (min) (V)	5
Source driver voltage (max) (V)	15	Level shifter/scan driver (Ch)	0
V_POS (max) (V)	30	V_NEG (max) (V)	-2
Features	VCOM or op amp	Topology	Boost
Rating	Catalog	Operating temperature range (°C)	-40 to 85
feature-number-of-digits		feature-number-of-segments
feature-maximum-clock-frequency-mhz		feature-process-technology
feature-interface-type		feature-minimum-operating-supply-voltage-v	2.7
feature-maximum-operating-supply-voltage-v	5.8	feature-maximum-supply-current-ma
feature-maximum-power-dissipation-mw	3300	feature-packaging	Tape and Reel
feature-pin-count	24	feature-cecc-qualified	No
feature-esd-protection	Yes	feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc	Yes
feature-svhc-exceeds-threshold	No