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PDF NT50198 Data sheet ( Hoja de datos )
| Número de pieza | NT50198 | |
| Descripción | TFT-LCD 3-Channel Charge Pump Power IC | |
| Fabricantes | Novatek | |
| Logotipo |  |
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NT50198
NT50198
TFT-LCD 3-Channel Charge Pump Power IC
Draft Spec.
Version 0.05
2012/08/22
2012/08/22
1 Version 0.05
With respect to the information represented in this document, NOVATEK makes no warranty, expressed or implied, including the warranties of merchantability, fitness for a
particular purpose, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any such information.
1 page  
1. General Description
NT50198
The NT50198 is a high-performance step-up charge pump and inverter to generate two output voltages; it is
including pumping controllers for positive and negative output voltage. The following content contains the detailed
description and the information of component selection.
The positive charge-pump controller provides adjustable regulated output AVDD and fixed -1 ratio of AVEE to
supply the TFT.
The pumping clock can be generated by internal circuit, to reduce the control signal from driver IC. Or the
charge and pump state can be synchronized with LCD display TE signal (PSYNC), it can reduce the interference to
display quality when states change.
The device requires only five (12 pins) or seven (16 pins) small and low-cost ceramic capacitors.
NT50198 is available in TDFN-12 / TDFN-16 / QFN-16 pins package for smart phone LCD panel’s driver IC.
Note: According to the FPC layout experience, the components on the FPC may have chance to fall off when
wind the FPC. So we strongly suggest to add the Stiffener under the FPC backside area of NT50198.
2. Features
Charge pump x2 mode for positive AVDD and x-1 mode for negative AVEE .
2.5V to 4.8V input supply voltage range
：AVDD output range 5.8V to 6.0V.
：AVEE output range -5.8V to -6.0V.
：VCL output range -2.5V to -3.2V.
Charge pump clock synchronized with PSYNC for benefit of low noise.
Positive and Negative regulated charge Pump with Diode free.
External Capacitor 5C or 7C only.
QFN-16 (3.0mm * 3.0mm * 0.8 mm) package is available.
TDFN-12 (1.5mm * 2.4mm * 0.5 mm) package is available.
TDFN-16 (1.5mm * 3.2mm * 0.5 mm) package is available.
Control signals voltage 1.65V to 4.8V.
2012/08/22
5 Version 0.05
With respect to the information represented in this document, NOVATEK makes no warranty, expressed or implied, including the warranties of merchantability, fitness for a
particular purpose, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any such information.
5 Page 
NT50198
4.5 QFN-16 pin
Pad No. Pad name
Description
1
C11P
Capacitor connection pin for the step-up circuit which generate AVDD.
2
C11M
Capacitor connection pin for the step-up circuit which generate AVDD.
3
GND
Ground.
Power enable control signal for AVDD and AVEE.
4 EN_VCL
Note: If driver IC will use VCL voltage, please tie to EN_PWR pin.
5 EN_PWR Power enable control signal for AVDD and AVEE.
Negative VCL output pin.
6 VCL
Note: If not used, please let it open.
Power-sync control signal generated from driver IC.
7 PSYNC
Note : If not used this clock synchronized signal, please tie to GND.
Capacitor connection pin for the step-up circuit which generate VCL.
8 C31M
Note: If not used, please let it open.
Capacitor connection pin for the step-up circuit which generate VCL..
9 C31P
Note: If not used, please let it open.
10 VCI Power supply input pin.
11 C12M Capacitor connection pin for the step-up circuit which generate AVDD.
12
C12P
Capacitor connection pin for the step-up circuit which generate AVDD.
13
AVEE
Negative AVEE output pin.
14 C21M Capacitor connection pin for the step-up circuit which generate AVEE.
15
C21P
Capacitor connection pin for the step-up circuit which generate AVEE.
16 AVDD Positive AVDD output pin.
17 Thermal-pad Connect to GND.
：Table3 QFN-16 pins description
4.6 QFN-16 pins package
：Figure7 QFN-16 pins assignment
2012/08/22
11 Version 0.05
With respect to the information represented in this document, NOVATEK makes no warranty, expressed or implied, including the warranties of merchantability, fitness for a
particular purpose, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any such information.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NT50198.PDF ] | |
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