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NT50198

TFT-LCD 3-Channel Charge Pump Power IC

Novatek Microelectronics

NT50198 Datasheet PDF : 32 Pages

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NT50198

Index

Index.............................................................................................................................................................................2

Reversion History .........................................................................................................................................................4

1. General Description ..................................................................................................................................................5

2. Features....................................................................................................................................................................5

3. Block Diagram and Operating Circuit .......................................................................................................................6

： 3.1 12 pins block diagram....................................................................................................................................................................................................6

： 3.2 16 pins block diagram case1 ..........................................................................................................................................................................................7

： 3.3 16 pins block diagram case2 ..........................................................................................................................................................................................8

4. Pin Description and package ....................................................................................................................................9

4.1 TDFN-12 pin ....................................................................................................................................................................................................................9

4.2 TDFN-12 package ............................................................................................................................................................................................................9

4.3 TDFN-16 pin ..................................................................................................................................................................................................................10

4.4 TDFN-16 package ..........................................................................................................................................................................................................10

4.5 QFN-16 pin.....................................................................................................................................................................................................................11

4.6 QFN-16 pins package .....................................................................................................................................................................................................11

5. External Component List ........................................................................................................................................12

5.1 12 pins component list....................................................................................................................................................................................................12

5.2 16 pins component list....................................................................................................................................................................................................12

6. Application information ...........................................................................................................................................13

：： 6.1 Power on / off sequence ...........................................................................................................................................................................................14

Case 1: EN_VCL = 1 and EN_VCL_FR = 0 (CP option): ............................................................................................................................................14

Case 2: EN_VCL = 1 and EN_VCL_FR = 1 (CP option): ............................................................................................................................................14

Case 3: EN_VCL = 0 and EN_VCL_FR = 0 (CP option): ............................................................................................................................................15

Case 4: EN_VCL = 0 and EN_VCL_FR = 1 (CP option): ............................................................................................................................................15

AVDD pre-charge to GND: control by EN_DIS2GND (CP option) .............................................................................................................................16

：： 6.2 Positive Charge Pump Controller .............................................................................................................................................................................17

：： 6.3 Negative Charge Pump Controller ...........................................................................................................................................................................17

：： 6.4 Application Note ......................................................................................................................................................................................................17

： 6.5 Typical characteristic:..................................................................................................................................................................................................18

6.5.1 Output voltage V.S. Output current with VCL (Vin = 3V , room temperature ) ...................................................................................................18

6.5.2 Efficiency V.S. output current with VCL(Vin = 3V , room temperature ) ............................................................................................................19

6.5.3 Output voltage V.S. Output current of without VCL (Vin = 3V , room temperature ) ..........................................................................................20

6.5.4 Efficiency V.S. output current of without VCL (Vin = 3V , room temperature ) ..................................................................................................21

： 6.6 Two ways to enhance output current capability: ..........................................................................................................................................................22

6.6.1: Dickson doubler circuit:......................................................................................................................................................................................22

6.6.2: External component table of Dickson doubler circuit: ........................................................................................................................................22

6.6.3: Power On / off sequence with external Dickson mode:.......................................................................................................................................23

6.6.4: Paralleling two device circuit:.............................................................................................................................................................................24

6.6.5: External component of Paralleling two device circuit:........................................................................................................................................26

2012/08/22

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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