19-4187; Rev 2; 5/09 High-Current VCOM Drive Op Amps for TFT LCDs The MAX9650/MAX9651 are single- and dual-channel VCOM amplifiers with rail-to-rail inputs and outputs. The MAX9650/MAX9651 can drive up to 1300mA of peak current per channel and operate up to 20V. The MAX9650/MAX9651 are designed to source and sink a high current quickly to hold the VCOM voltage stable in large TFT-LCD panels. The MAX9650/MAX9651 feature 40V/µs slew rate and 35MHz bandwidth to quickly settle outputs for 120Hz frame rate and full HD television. The MAX9650/MAX9651 feature output short-circuit protection and thermal shutdown. These devices are available in exposed pad packages for excellent heat dissipation. Features ♦ 1300mA Peak Output Current ♦ Rail-to-Rail Inputs and Outputs ♦ Operates Up to 20V ♦ 40V/µs Slew Rate ♦ 35MHz Bandwidth ♦ 5mA Quiescent Current per Channel ♦ Excellent Heat Dissipation (Exposed Pad) Applications Ordering Information TFT-LCD Panels AMPS PER PACKAGE PART Instrument Control Voltage Sources PINPACKAGE TOP MARK MAX9650AZK+ 1 5 SOT23 ADSI MAX9650AUA+ 1 8 µMAX-EP* AABI MAX9650ATA+ 1 8 TDFN-EP* BKX MAX9651AUA+ 2 8 µMAX-EP* AABH MAX9651ATA+ 2 8 TDFN-EP* BKY Note: All devices are specified over the -40°C to +125°C operating range. +Denotes a lead-free/RoHS-compliant package. *EP = Exposed pad. Typical Operating Circuit 16V VDD MAX9650 VREF TFT LCD IN_+ OUT_ IN_- *RS TFT-LCD CAPACITANCE GND *RS MAY BE NEEDED FOR SOME APPLICATIONS. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX9650/MAX9651 General Description MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs ABSOLUTE MAXIMUM RATINGS Supply Voltage (VDD to GND) ................................-0.3V to +22V Any Other Pin to GND ................................-0.3V to (VDD + 0.3V) IN_+/IN_- (current)............................................................±20mA OUT_ (current) ......................................................................1.3A Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 3.7mW/°C above +70°C)........297.4mW 8-Pin µMAX-EP (derate 12.9mW/°C above +70°C).......................................................1030.9mW 8-Pin TDFN-EP (derate 23.8mW/°C above +70°C).......................................................1951.2mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VDD = 19V, VGND = 0, VCM = VOUT = VDD/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS Supply Voltage Range VDD Guaranteed by PSRR Quiescent Current IDD Per channel High Output Voltage VOH IH = +5mA, VIN = VDD Low Output Voltage VOL IL = -5mA, VIN = 0 Input Offset Voltage VOS MIN 3.7 VDD 0.30 TA = +25°C -14 TA = -40°C to +125°C -17 IFB At VIN = 9.5V AV AV = 1V/V, RL = 10kΩ, CL = 50pF VDD = 6V to 20V, VCM = VOUT = 3V 70 Common-Mode Input Voltage Range CMVR Inferred from CMRR test 0.5 Common-Mode Rejection Ratio CMRR 0.5V ≤ VCM ≤ VDD - 0.5V 60 IO VOUT = 9.5V (Note 2) MAX9650AZK+ 20 MAX9650AUA+ 80 VDD = 15V, VOUT = 7.5V MAX9650ATA+ V +17 0.01 PSRR mA +14 0.99 Power-Supply Rejection Ratio 8 0.30 -0.2 Voltage Gain V 3.5 +0.2 Input Bias Current UNITS 20 0.05 IOUT = 0 to -80mA LR MAX VDD 0.05 IOUT = 0 to +80mA Load Regulation Continuous Output Current TYP 6 V mV/mA 1 µA 1.01 V/V 95 dB VDD 0.5 80 V V dB mA ±350 Transient Peak Output Current IPK (Note 3) ±1.3 A Bandwidth BW -3dB 35 MHz Slew Rate SR 4V step, CL = 50pF, RL = 10kΩ, AV = +1V/V 40 V/µs Settling Time tS Settling to 0.1% of VOUT, IL = 0 to 1000mA, RS = 2.2Ω, CS = 0.1µF (Figure 1) 2.0 µs 2 _______________________________________________________________________________________ High-Current VCOM Drive Op Amps for TFT LCDs (VDD = 19V, VGND = 0, VCM = VOUT = VDD/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Maximum Load Capacitance CLOAD (Note 4) 150 nF Noninverting Input Resistance RIN+ (Note 5) 100 MΩ Inverting Input Resistance RIN- (Note 5) 100 MΩ Input Capacitance CIN 3 pF Thermal Shutdown Thermal Shutdown Hysteresis +170 °C 15 °C All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Continuous output current is tested with one output at a time. See the Thermal Shutdown with Temperature Hysteresis section. A series resistor can extend load capacitance range. The settling time can be optimized by a small series resistance. See the Applications Information section for more information. Note 5: Inputs are protected by back-to-back diodes. Note 1: Note 2: Note 3: Note 4: Typical Operating Characteristics (VDD = 19V, GND = 0, VCM = VOUT = VDD/2, TA = +25°C, unless otherwise specified.) 1 0 TA = +25°C -1 TA = -40°C -2 6 5 4 3 2 -3 1 -4 0 6 9 12 15 SUPPLY VOLTAGE (V) 18 21 MAX9650 toc03 7 7 SUPPLY CURRENT (mA) TA = +125°C 2 8 MAX9650 toc02 INPUT OFFSET VOLTAGE (mV) 3 8 INPUT OFFSET VOLTAGE (mV) MAX9650 toc01 4 SUPPLY CURRENT vs. SUPPLY VOLTAGE INPUT OFFSET VOLTAGE DEVIATION vs. TEMPERATURE INPUT OFFSET VOLTAGE DEVIATION vs. SUPPLY VOLTAGE 6 TA = +125°C 5 4 TA = +25°C 3 TA = -40°C 2 1 0 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 6 9 12 15 18 21 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 3 MAX9650/MAX9651 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (continued) (VDD = 19V, GND = 0, VCM = VOUT = VDD/2, TA = +25°C, unless otherwise specified.) SUPPLY CURRENT vs. TEMPERATURE IOUT (500mA/div) 6 MAX9650 toc06 MAX9650 toc05 MAX9650 toc04 7 SUPPLY CURRENT (mA) LOAD TRANSIENT SINKING LOAD TRANSIENT SOURCING 8 IOUT (500mA/div) 5 4 0.1A RESPONSE 1A RESPONSE 3 VOUT (125mA/div) 2 VOUT (125mV/div) 0.5A RESPONSE 1 0.5A RESPONSE 1A RESPONSE 0.1A RESPONSE 0 -50 -25 0 25 50 75 100 TIME (1µs/div) TIME (1µs/div) MAX9650 STEP RESPONSE WITH VARIOUS CL OPEN-LOOP GAIN AND PHASE vs. FREQUENCY 125 TEMPERATURE (°C) CL = 0.01µF VOUT 5V/div VOUT 5V/div 3 2 1 CL = 560pF 0 CL = 10pF GAIN (dB) 5 CL = 100pF -10 -1 -2 -3 CL = 56pF 0.01 0.1 1 FREQUENCY (MHz) 10 100 60 PHASE 0 0 -20 -60 -40 -120 -60 -180 -240 100E+0 1E+3 100E+3 1E+6 10E+3 FREQUENCY (Hz) 15 VOUT = 100mVP-P RL = 10kΩ TO VDD/2 10 10E+6 100E+6 10,000pF 1000pF 100pF 0 -5 -10 10pF -15 -5 -15 120 20 5 -4 -5 180 40 20 0 CL = 0.001µF CL = 0.1µF VOUT = 100mVP-P RL = 10kΩ TO VDD/2 GAIN (dB) CL = 0.01µF 10 240 SMALL-SIGNAL GAIN vs. FREQUENCY WITH VARIOUS CL MAX9650 toc11 CL = 0.0022µF 300 60 SMALL-SIGNAL GAIN vs. FREQUENCY MAX9650 toc10 20 360 CL = 100pF 80 -80 10E+0 2µs/div CLOSED-LOOP SMALL-SIGNAL FREQUENCY RESPONSE FOR VARIOUS CL MAX9650 toc09 GAIN 100 VOUT 5V/div CL = 0.022µF 100ms/div 4 VOUT 5V/div CL = 2200pF VIN 5V/div 15 VOUT 5V/div CL = 10pF VDD 10V/div 120 -6 -20 -7 100E+3 -25 100E+3 1E+6 10E+6 FREQUENCY (Hz) 100E+6 1E+6 10E+6 FREQUENCY (Hz) _______________________________________________________________________________________ 100E+6 PHASE (DEG) MAX9650 toc08 IDD 10mA/div MAX9650 toc12 MAX9650 toc07 GAIN (dB) STARTUP WAVEFORM VOLTAGE GAIN (dB) MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs High-Current VCOM Drive Op Amps for TFT LCDs PIN MAX9650 MAX9651 NAME FUNCTION SOT23 µMAX 1 6 1 OUTA VCOM Output A 2 4 4 GND Ground 3 3 3 INA+ Positive Input A 4 2 2 INA- Negative Input A Positive-Supply Input. Bypass VDD to GND with a 0.1µF capacitor as close as possible to the device. 5 7 8 VDD — — 5 INB+ Positive Input B — — 6 INB- Negative Input B — — 7 OUTB — 1, 5, 8 — N.C. — — — EP VCOM Output B No Connection. Not internally connected. Exposed Pad. EP is internally connected to GND. Connect EP to GND. Detailed Description The MAX9650/MAX9651 operational rail-to-rail input/output amplifiers hold the VCOM voltage stable while providing the ability to source and sink a high current quickly (1.3A) into a capacitive load such as the backplane of a TFT-LCD panel. Thermal Shutdown with Temperature Hysteresis The MAX9650/MAX9651 are capable of high output currents and feature thermal-shutdown protection with temperature hysteresis. When the die temperature reaches +170°C, the device shuts down. When the die cools down by 15°C, the device turns on again. In a TFT-LCD application, the duty cycle is very low. Even with high values of voltage and current, the power dissipation is low and the chip does not shut down. Applications Information Output Load The MAX9650/MAX9651 are designed to drive capacitive loads. A small value of series resistance improves the performance of the device to ensure stability and fast settling with very large or very small capacitive loads. In many cases, this resistance is already present due to connection resistance in the wiring and no additional physical resistor is necessary. 19V SUPPLY *C2 = 0.1µF *C1 = 10µF 19V SUPPLY VDD MAX9650 VREF LCD VCOM LOAD IN_+ OUT_ VOUT_ IN_- RS = 2.2Ω CLCD = 0.1µF **0V TO 2.2V AT 50kHz GND *10µF and 0.1µF CAPACITORS AS CLOSE AS POSSIBLE TO THE PIN. **(RS = RGEN) x CLCD x 6 < 2µs, WHERE RGEN = GENERATOR SOURCE IMPEDANCE. Figure 1. Settling Time Test Circuit Power Supplies and Bypass Capacitors The MAX9650/MAX9651 operate from a 6V to 20V single supply or from ±4.5V to ±10V dual supplies. Proper supply bypassing ensures stability while driving high transient loads. The MAX9650/MAX9651 require a minimum 10µF (C1) and 0.1µF (C2) power-supply bypass capacitors placed as close as possible to the power-supply pin _______________________________________________________________________________________ 5 MAX9650/MAX9651 Pin Description MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs (VDD). See Figure 2. For dual-supply operation, use 10µF and 0.1µF bypass capacitors on both supplies (VDD and GND) with each capacitor placed as close as possible to VDD and GND. 16V SUPPLY *C2 = 0.1µF *C1 = 10µF 19V SUPPLY Layout and Grounding The exposed pad on the µMAX® and TDFN packages provide a low thermal resistance for heat dissipation. Solder the exposed pad to a ground plane for best thermal performance. Do not route traces under these packages. For dual-supply operation, the exposed pad (EP) can be electrically connected to the negative supply or it can be left unconnected. VDD MAX9650 VREF TFT LCD IN_+ OUT_ IN_- **RS TFT-LCD CAPACITANCE GND Chip Information PROCESS: BiCMOS *10µF and 0.1µF CAPACITORS AS CLOSE AS POSSIBLE TO THE PIN. **RS MAY BE NEEDED FOR SOME APPLICATIONS. µMAX is a registered trademark of Maxim Integrated Products, Inc. Figure 2. Typical TFT-LCD Backplane Drive Circuit Pin Configurations + 5 VDD GND 2 INA+ 3 4 THIN SOT23 6 8 N.C. OUTA 1 INA- 2 7 VDD INA+ 3 6 GND 4 5 N.C. 1 MAX9650 OUTA 1 INA- + MAX9650 µMAX-EP (TDFN-EP) + 8 VDD INA- 2 7 OUTB OUTA INA+ 3 6 INB- N.C. GND 4 5 INB+ MAX9651 µMAX-EP (TDFN-EP) _______________________________________________________________________________________ High-Current VCOM Drive Op Amps for TFT LCDs PACKAGE CODE DOCUMENT NO. 5 SOT23 Z5-2 21-0113 8 µMAX U8E-2 21-0107 8 TDFN-EP T833-2 21-0137 THIN SOT23.EPS PACKAGE TYPE _______________________________________________________________________________________ 7 MAX9650/MAX9651 Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. 8 _______________________________________________________________________________________ High-Current VCOM Drive Op Amps for TFT LCDs 8L, µMAX, EXP PAD.EPS 21-0107 C 1 1 _______________________________________________________________________________________ 9 MAX9650/MAX9651 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. 6, 8, &10L, DFN THIN.EPS MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs 10 ______________________________________________________________________________________ High-Current VCOM Drive Op Amps for TFT LCDs COMMON DIMENSIONS PACKAGE VARIATIONS SYMBOL MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e A 0.70 0.80 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF E 2.90 3.10 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF A1 0.00 0.05 T1033-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF L 0.20 0.40 T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF k 0.25 MIN. T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF A2 0.20 REF. T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF ______________________________________________________________________________________ 11 MAX9650/MAX9651 Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Revision History REVISION NUMBER REVISION DATE 0 7/08 1 10/08 Updated slew rate and added TDFN-EP package 1, 2, 6, 10, 11 2 5/09 Updated continuous output current specification 2 DESCRIPTION Initial release PAGES CHANGED — Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.