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Gradation Voltage Generating IC for Color TFT-LCD
AN1702FHK
Gray-scale voltage generating IC for liquid crystal display
I Overview
The AN1702FHK has been designed for LCD applications,and features built-in functions such as a gray-scale voltage generatior that supports 256 gradations, a reference voltage of 1.23 V, 16 output buffer amp circuits and a COM amplifier circuit.
9.00.2 7.00.1 36 25 24
Unit: mm
37
(0.75)
48 13 (0.75) 1 0.50 12 0.200.05
I Features
* Built-in 1.23 V (typical) high-precision reference voltage power source * Wide buffer amp. dynamic range output: VCC - 0.2 V (top stage) to GND + 0.15 V (bottom stage) * Large 100 mA (max.) COM amp. driving current
7.00.1 9.00.2
0.10 M
(1.00)
0.10-0.05
+0.10
1.20 max.
0.150.05
(1.0)
0 to 8 0.50.1
I Applications
* Gray-scale power sources for LCDs
TQFP048-P-0707B
I Block Diagram
VB3 VB4 VB5 VB6 VB7 N.C. GND2 VA7 VA6 VA5 VA4 VA3
36 VB2 37
35
34
33
32
31
30
29
28
27
26
25 VA2 24
VB1
L4
38
L5
VA1 23 VA0
R2 L6
VB0
39
22 N.C.
R1
GND1
40 REF
L7 R0
21 VREF
N.C.
41
20
COM1
42
R7
VR 19 VREF 18 N.C.
COM0
43 COM
L2
COMS
44
L0
R6
17
R5
VCC1
VL0
45
L1 L3
N.C. 16
R4
N.C.
46
15
R3
VR0
VL1
47
14
VR1
VL2
48 1 2 3 4 5 6 7 8 9 10 11 12
13
VR2
VL3
VL4
VL5
VL6
VL7
N.C.
VCC2
VR7
VR6
VR5
VR4
VR3
1
AN1702FHK
I Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
Gradation Voltage Generating IC for Color TFT-LCD
Symbol VCC ICC PD Topr Tstg IOSOURCE IO-R0 IO+R0 IO-R1-R5, L1-L5
Rating 15.8 200 0 to +75 -55 to +125 -5 -15 0.05 -10
Unit V mA mW C C mA mA mA mA
Operating ambient temperature Strage temperature
*1
REF amplifier output source current R0 amplifier output source current R0 amplifier output sink current R0, R1, R2, R3, R4, R5, L5, L4, L3, L2, L1 amplifier output source current R6, R7, L7, L6 amplifier output source current R0, R1, R2, R3, R4, R5, L5, L4, L3, L2, L1 amplifier output sink current R6, R7, L7, L6 amplifier output sink current L0 amplifier output source current L0 amplifier output sink current COM amplifier output source current COM amplifier output sink current REF amplifier maximum load capacitance R0, R1, R2, R3, R4, R5, R6, R7, L7, L6, L5, L4, L3, L2, L1, L0 amplifier maximum load capacitance COM amplifier maximum load capacitance
IO-R6-L6 IO+R1-R5, L1-L5
-15 10
mA mA
IO+R6-L6 IO-L0 IO+L0 IO-COM IO+COM COREF COR/L
15 - 0.05 15 -100 100 0.2 0.1
mA mA mA mA mA F F
COCOM
10
F
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned. For circuit currents, '+' denotes current flowing into the IC, and '-' denotes current flowing out of the IC. 2. *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2:Ta = 75C. For the independent IC without a heat sink.
I Recommended Operating Range
Parameter Supply voltage Load capacitance R0 to L0 COM REF Symbol VCC CLOAD Range 7 to 15.5 0.01 0.1 to 1 0.1 Unit V F F F
2
Gradation Voltage Generating IC for Color TFT-LCD
I Electrical Characteristics at Ta = 25C
Parameter Circuit current Reference voltage Input bias current REF amplifier block Operating upper limit voltage Operating lower limit voltage R0 amplifier block Output upper limit voltage 1 Output upper limit voltage 2 Output lower limit voltage Offset voltage R1 amplifier block Output upper limit voltage Output lower limit voltage Offset voltage R2 amplifier block Output upper limit voltage Output lower limit voltage Offset voltage VHR2 VLR2 VOFFR2 VHR3-R5 VHR6-R7 VLR3-R5 VLR6-R7 VHL3-L5 VHL6-L7 VLL3-L5 VLL6-L7 VOFF34567 IOUT = -10 mA IOUT = -15 mA IOUT = 10 mA IOUT = 15 mA IOUT = -10 mA IOUT = -15 mA IOUT = 10 mA IOUT = 15 mA IOUT = -10 mA IOUT = 10 mA VCC - 0.7 VCC - 1.2 VCC - 1.2 VCC - 2.0 VCC - 2.0 VHR1 VLR1 VOFFR1 IOUT = -10 mA IOUT = 10 mA VCC - 0.3 VHR01 VHR02 VLR0 VOFFR0 IOUT = -10 mA IOUT = -15 mA IOUT = 0.05 mA VCC - 0.2 VCC - 0.23 VH VL IOUT = -2 mA, COUT 0.1 F COUT 0.1 F VCC - 0.2 Symbol ICC VREF IB Conditions Min 1.19
AN1702FHK
Typ 1.23
Max 10 1.27 500 VREF VCC - 3.0 10 VCC / 2 10 VCC / 2 10 2 2 1.2 1.2 10
Unit mA V nA
V V
V V V mV
V V mV
V V mV
R3, R4, R5, R6, R7, L3, L4, L5, L6, L7 amplifier block Output upper limit voltage 1 Output upper limit voltage 2 Output lower limit voltage 1 Output lower limit voltage 2 Output upper limit voltage 3 Output upper limit voltage 4 Output lower limit voltage 3 Output lower limit voltage 4 Offset voltage V V V V V V V V mV
3
AN1702FHK
Gradation Voltage Generating IC for Color TFT-LCD
I Electrical Characteristics at Ta = 25C (continued)
Parameter L2 amplifier block Output upper limit voltage Output lower limit voltage Offset voltage L1 amplifier block Output upper limit voltage Output lower limit voltage Offset voltage L0 amplifier block Output upper limit voltage Output lower limit voltage Offset voltage COM amplifier block Output upper limit voltage Output lower limit voltage Offset voltage VHCOM VLCOM IOUT = -100 mA IOUT = 100 mA VCC -2.5 2.5 10 V V mV VHL0 VLL0 VOFFL0 IOUT = - 0.05 mA IOUT = 15 mA 3 0.15 10 V V mV VHL1 VLL1 VOFFL1 IOUT = -10 mA IOUT = 10 mA VCC / 2 0.25 10 V V mV VHL2 VLL2 VOFFL2 IOUT = -10 mA IOUT = 10 mA VCC / 2 0.7 10 V V mV Symbol Conditions Min Typ Max Unit
VOFFCOM VIN = 5 V
I Technical Data
* PD Ta curves of TQFP048-P-0707B PD T a
900 800 772 700 Mounted on standard board (glass epoxy: 50 mm x 50 mm x t0.8 mm) Rth(j-a) = 129.5C/W
Power dissipation PD (mW)
600 500 400 399 300 200 100 0 0 25 50 75 100 125 Independent IC without a heat sink Rth(j-a) = 250.6C/W
Ambient temperature Ta (C)
4
Gradation Voltage Generating IC for Color TFT-LCD
I Application Circuit Example
* System configuration example COM amplifier
16
AN1702FHK
source driver
VR0 VR1 VR2
AN1702FHK
VL2 VL1 VL0
Liquid crystal panel
Display data
H, V, CLK Data Display controllor
Control signal
Control signal
* Application circuit example
VREF output voltage = 1.23 V x R1 + R 2 (but this never exceeds VCC) R1 Output current 100 mA (max.)
To the reference voltage pin of LSI
COMS
VCC1
VCC2
Output VREF
1.23 V
VA1
VA7
VB7
VB0
Current Total current should be lower than 5 mA. Current
COM1
VB6
VA0
R2
R1
COM0
VR0
VR1
VR7
VL7
VL6
VL0
Gate driver
5
Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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