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Eutech Microelectronics

EUP2619 Datasheet Preview

EUP2619 Datasheet

TFT LCD DC-DC Converter

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Preliminary
EUP2619
TFT LCD DC-DC Converter with Integrated
Charge Pumps and OP-AMP
DESCRIPTION
The EUP2619 generates power supply rails for thin-film
transistor (TFT) liquid-crystal display (LCD) panels in
tablet PCs and notebooks operated from 2.5V to 5.5V input
supply. The device integrates a step-up converter, positive
and negative charge pumps, and a high speed VCOM buffer.
The external compensated step-up converter, providing the
regulated supply voltage for the panel source driver ICs,
features an internal power MOSFET and high frequency
operation allowing to use small inductors and capacitors.
The step up converter uses fixed-frequency peak current
mode control architecture which provides fast
load-transient response and easy compensation. A 2.8A
peak current limit for the internal switch protects power
supply fault condition.
The regulated positive and negative charge pump regulators
generate the positive and negative supply rails for the TFT
LCD gate resistive voltage-divider ICs.
The high speed VCOM buffer features 500mA short circuit
current, 20MHz bandwidth, fast slew rate 45V/µs, and
rail-to-rail inputs and outputs.
The EUP2619 includes internal power-up sequencing,
over/under voltage protections of the boost converter, and
over temperature protection to ensure in safe operating.
The EUP2619 are available in a 16-pin 3mm × 3mm TQFN
packages.
Typical Application Circuit
FEATURES
2.5V to 5.5V Input Supply Range
1.2MHz Current-Mode Step-Up Converter
- Built-In 20V/2.8A, 0.16N-Channel MOSFET
- High Efficiency Up to 90%
- ±1% Accurate Output Voltage
- Fast Transient Response to Pulse Load
- Over-Current Protection
- Output Under-Voltage Protection
600kHz Negative Charge Pump Driver for VGL
600kHz Positive Charge Pump Driver for VGH
High Speed High Current 18V VCOM Buffer
- ±500mA Output Short-Circuit Current
- 45V/µs Slew Rate
- 20MHz, -3dB Bandwidth
- Rail-to-Rail Input and Output
Power-On Sequence Control
Thermal-Overload Protection
3mm × 3mm TQFN-16 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
Tablet PCs
Notebook Displays
DS2619 Ver0.1 Nov. 2011
Figure 1.
1




Eutech Microelectronics

EUP2619 Datasheet Preview

EUP2619 Datasheet

TFT LCD DC-DC Converter

No Preview Available !

Tel: 0755-8398 3377 / 135 9011 2223
http://www.gofotech.com
Pin Configurations
Package Type
Preliminary
Pin Configurations
EUP2619
TQFN-16
Pin Description
PIN TQFN-16
DESCRIPTION
1 DRVN Driver output pin of the negative charge pump.
2
REF
Reference bypass terminal. Bypass REF to AGND with a minimum of 0.22µF close to
this pin.
3 AGND Analog Ground.
4 NC No Connection.
5 EN Active-High Enable Control Input.
6 OPAI VCOM buffer input pin. If OP function is not used, connect this pin to AGND.
7 OPAO VCOM buffer output pin. If OP function is not used, make sure this pin floating.
8
SUP
VCOM buffer, VGH, and VGL charge pump power input. Positive supply rail for the
operational amplifiers.
9 PGND Power Ground.
10 LX Switching pin. Drain of the internal power NMOS for the main step-up regulator.
11 IN Supply Input.
Main Boost Regulator Feedback Input. FB regulates to 1.2V nominal. Connect FB to
12 FB the center of a resistive voltage-divider between the main output and the analog ground
(AGND). Place the resistive voltage-divider close to the pin.
13 COMP Compensation error amplifier pin.
14 FBP Feedback pin of positive charge pump. Regulates to 1.2V nominal.
15 DRVP Driver output pin of the positive charge pump.
16 FBN Feedback pin of negative charge pump. Regulates to 0.24V nominal.
-
Thermal
Pad
Exposed pad should be soldered to PCB board and connected to AGND.
DS2619 Ver0.1 Nov. 2011
2


Part Number EUP2619
Description TFT LCD DC-DC Converter
Maker Eutech Microelectronics
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EUP2619 Datasheet PDF






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