N T50198
TFT-LCD 3-Channel Charge Pump Power IC
D r a f t S p e c.
V e r s i o n0.05
中华神话故事2012/08/22
2012/08/22 1 Version 0.05 With respect to the information reprented in this document, NOVATEK makes no warranty, expresd or implied, including the warranties of merchantability, fitness for a particular purpo, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or ufulness of any such information.
金线莲的食用方法2012/08/22 2 Version 0.05
With respect to the information reprented in this document, NOVATEK makes no warranty, expresd or implied, including the warranties of merchantability, fitness for a particular purpo, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or ufulness of any such information.
I n d e x
I n d e x .............................................................................................................................................................................2 Reversion History .........................................................................................................................................................4 1.
.................5 2. 5 3. Block Diagram and Operating Circuit.. (6)
3.1：12 pins 6 3.2：16 pins block 7 3.3：16 pins block diagram ca2 (8)
4. Pin Description and package (9)
读书笔记大全4.1 .9 4.2 9 4.3 10
4.4 10 4.5 11 4.6 QFN-16 pins package.. (11)
5. External Component List (12)
5.1 12 pins 12 5.2 16 pins component list. (12)
6. Application information (13)
6.1：Power on / off quence ：...........................................................................................................................................................................................14 Ca 1: EN_VCL = 1 and EN_VCL_FR = 0 (CP option):............................................................................................................................................14 Ca 2: EN_VCL = 1 and EN_VCL_FR = 1 (CP option):........................................................................
....................................................................14 Ca 3: EN_VCL = 0 and EN_VCL_FR = 0 (CP option):............................................................................................................................................15 Ca 4: EN_VCL = 0 and EN_VCL_FR = 1 (CP option):............................................................................................................................................15 A VDD 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 )......................................................................................
马王堆帛书北京冬奥会赛程......................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 quence 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 3 Version 0.05
With respect to the information reprented in this document, NOVATEK makes no warranty, expresd or implied, including the warranties of merchantability, fitness for a particular purpo, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completenes
s or ufulness of any such information.
班主任7. Package Information ： (27)
7.1 TDFN-12 27 7.2 TDFN-16 28 7.3 QFN-16 pins package.. (30)
8. Absolute Maximum Ratings ：................................................................................................................................31 9. Thermal Information ：............................................................................................................................................31 10. Electrical Specifications ： (32)
2012/08/22 4 Version 0.05
With respect to the information reprented in this document, NOVATEK makes no warranty, expresd or implied, including the warranties of merchantability, fitness for a particular purpo, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or ufulness of any such information.
Reversion History
2012/08/22 5 Version 0.05怎样制作手工
With respect to the information reprented in this document, NOVATEK makes no warranty, expresd or implied, including the warranties of merchantability, fitness for a particular purpo, and non-infringement, nor assumes any legal liability or responsibility for the accuracy, completeness or ufulness of any such information.
1. General Description
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 lection.
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 ven (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.
检查结果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 noi. 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.
