NT50198 データシートの表示（PDF） - Novatek Microelectronics

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NT50198

TFT-LCD 3-Channel Charge Pump Power IC

Novatek Microelectronics 

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.

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