Gradation Voltage Generating IC for Color TFT-LCD AN1702FHK Gray-scale voltage generating IC for liquid crystal display ■ Overview Unit: mm 9.00±0.20 7.00±0.10 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. 37 ■ Features 48 25 36 7.00±0.10 9.00±0.20 (0.75) 24 12 0.20±0.05 0.50 0.15±0.05 (1.00) 0.10 (1.00) 1.20 max. 1 (0.75) 0.10 M 0.10+0.10 -0.05 • 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 13 Seating plane 0° to 8° 0.50±0.10 ■ Applications TQFP048-P-0707B (Lead-free package) • Gray-scale power sources for LCDs ■ Block Diagram VB2 VB1 VB0 GND1 VB3 VB4 VB5 VB6 VB7 N.C. 36 35 34 33 32 31 GND2 VA7 30 29 VA6 VA5 VA4 VA3 28 27 26 25 VA2 37 24 L4 VA1 38 23 L5 VA0 39 R2 22 L6 N.C. 40 REF R1 N.C. L7 41 21 20 R0 COM1 COM0 VL0 N.C. VL1 VL2 VR 42 19 VREF R7 43 COM COMS VREF N.C. 18 L2 R6 44 17 L0 N.C. R5 45 16 L3 L1 R4 46 15 R3 47 14 48 13 1 2 3 4 5 6 VL3 VL4 VL5 VL6 VL7 N.C. Publication date: December 2001 7 VCC2 SDF00004BEB VCC1 8 9 VR7 VR6 10 VR5 11 VR4 VR0 VR1 VR2 12 VR3 1 AN1702FHK ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VCC 15.8 V ICC mA PD 200 mW Topr 0 to +75 °C Tstg −55 to +125 °C IOSOURCE −5 mA R0 amplifier output source current IO−R0 −15 mA R0 amplifier output sink current IO+R0 0.05 mA R0, R1, R2, R3, R4, R5, L5, L4, L3, L2, L1 amplifier output source current IO−R1-R5, L1-L5 −10 mA R6, R7, L7, L6 amplifier output source current IO−R6-L6 −15 mA R0, R1, R2, R3, R4, R5, L5, L4, L3, L2, L1 amplifier output sink current IO+R1-R5, L1-L5 10 mA R6, R7, L7, L6 amplifier output sink current IO+R6-L6 15 mA L0 amplifier output source current IO−L0 − 0.05 mA L0 amplifier output sink current IO+L0 15 mA COM amplifier output source current IO−COM −100 mA COM amplifier output sink current IO+COM 100 mA REF amplifier maximum load capacitance COREF 0.2 µF R0, R1, R2, R3, R4, R5, R6, R7, L7, L6, L5, L4, L3, L2, L1, L0 amplifier maximum load capacitance COR/L 0.1 µF COM amplifier maximum load capacitance COCOM 10 µF Supply voltage Supply current Power dissipation *2 Operating ambient temperature Strage temperature *1 *1 REF amplifier output source current 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 = 25°C. *2:Ta = 75°C. For the independent IC without a heat sink. ■ Recommended Operating Range Parameter Symbol Range Unit VCC 7 to 15.5 V CLOAD 0.01 µF COM 0.1 to 1 µF REF 0.1 µF Supply voltage Load capacitance 2 R0 to L0 SDF00004BEB AN1702FHK ■ Electrical Characteristics at Ta = 25°C Parameter Min Typ Max Unit ICC 10 mA Reference voltage VREF 1.19 1.23 1.27 V Input bias current IB 500 nA VCC − 0.2 V Circuit current Symbol Conditions REF amplifier block Operating upper limit voltage VH IOUT = −2 mA, COUT ≥ 0.1 µF Operating lower limit voltage VL COUT ≥ 0.1 µF VREF V Output upper limit voltage 1 VHR01 IOUT = −10 mA VCC − 0.2 V Output upper limit voltage 2 VHR02 IOUT = −15 mA VCC − 0.23 V Output lower limit voltage VLR0 IOUT = 0.05 mA VCC − 3.0 V 10 mV R0 amplifier block Offset voltage VOFFR0 R1 amplifier block Output upper limit voltage VHR1 IOUT = −10 mA VCC − 0.3 V Output lower limit voltage VLR1 IOUT = 10 mA VCC / 2 V 10 mV Offset voltage VOFFR1 R2 amplifier block Output upper limit voltage VHR2 IOUT = −10 mA VCC − 0.7 V Output lower limit voltage VLR2 IOUT = 10 mA VCC / 2 V 10 mV Offset voltage VOFFR2 R3, R4, R5, R6, R7, L3, L4, L5, L6, L7 amplifier block Output upper limit voltage 1 VHR3-R5 IOUT = −10 mA VCC − 1.2 V Output upper limit voltage 2 VHR6-R7 IOUT = −15 mA VCC − 1.2 V Output lower limit voltage 1 VLR3-R5 IOUT = 10 mA 2 V Output lower limit voltage 2 VLR6-R7 IOUT = 15 mA 2 V Output upper limit voltage 3 VHL3-L5 IOUT = −10 mA VCC − 2.0 V Output upper limit voltage 4 VHL6-L7 IOUT = −15 mA VCC − 2.0 V Output lower limit voltage 3 VLL3-L5 IOUT = 10 mA 1.2 V Output lower limit voltage 4 VLL6-L7 IOUT = 15 mA 1.2 V 10 mV Offset voltage VOFF34567 SDF00004BEB 3 AN1702FHK ■ Electrical Characteristics at Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit L2 amplifier block Output upper limit voltage VHL2 IOUT = −10 mA VCC / 2 V Output lower limit voltage VLL2 IOUT = 10 mA 0.7 V 10 mV Offset voltage VOFFL2 L1 amplifier block Output upper limit voltage VHL1 IOUT = −10 mA VCC / 2 V Output lower limit voltage VLL1 IOUT = 10 mA 0.25 V 10 mV Offset voltage VOFFL1 L0 amplifier block Output upper limit voltage VHL0 IOUT = − 0.05 mA 3 V Output lower limit voltage VLL0 IOUT = 15 mA 0.15 V 10 mV Offset voltage VOFFL0 COM amplifier block Output upper limit voltage VHCOM IOUT = −100 mA VCC −2.5 V Output lower limit voltage VLCOM IOUT = 100 mA 2.5 V 10 mV VOFFCOM VIN = 5 V Offset voltage ■ Technical Data • PD Ta curves of TQFP048-P-0707B PD T a 900 Mounted on standard board (glass epoxy: 50 mm × 50 mm × t0.8 mm) Rth(j-a) = 129.5°C/W 800 772 Power dissipation PD (mW) 700 600 500 400 399 300 Independent IC without a heat sink Rth(j-a) = 250.6°C/W 200 100 0 0 25 50 75 100 Ambient temperature Ta (°C) 4 SDF00004BEB 125 AN1702FHK ■ Application Circuit Example • System configuration example COM amplifier 16 source driver VR0 VR1 VR2 Gate driver AN1702FHK Liquid crystal panel VL2 Control signal VL0 Display data VL1 H, V, CLK Control signal Display controllor Data • Application circuit example VREF output voltage = 1.23 V × R1 + R 2 (but this never exceeds VCC) R1 Output current ±100 mA (max.) COM0 COMS VL0 VL6 VL7 VR7 VR1 VR0 VCC2 COM1 VB0 VB6 VB7 VA7 VA1 VA0 R1 R2 Output VREF 1.23 V VCC1 To the reference voltage pin of LSI Current Total current should be lower than 5 mA. Current SDF00004BEB 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. 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