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MAX9650/MAX9651

High-Current VCOM Drive Op Amps

for TFT LCDs

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

General Description

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.

Applications

TFT-LCD Panels

Instrument Control Voltage Sources

Features

o 1300mA Peak Output Current

o Rail-to-Rail Inputs and Outputs

o Operates Up to 20V

o 40V/µs Slew Rate

o 35MHz Bandwidth

o 5mA Quiescent Current per Channel

o Excellent Heat Dissipation (Exposed Pad)

19-4187; Rev 5; 11/12

IN_+

IN_-

GND

OUT_

TFT LCD

TFT-LCD

CAPACITANCE

16V

REF

MAY BE NEEDED FOR SOME APPLICATIONS.

MAX9650

Typical Operating Circuit

Ordering Information

PART

AMPS PER

PACKAGE

PIN-

PACKAGE

TOP MARK

MAX9650AZK+ 1 5 SOT23 ADSI

MAX9650AZK/V+

1 5 SOT23 ADSK

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 oper-

ating range.

Denotes a lead(Pb)-free/RoHS-compliant package.

/V denotes an automotive qualified part.

EP = Exposed pad.

Summary of content (13 pages)

PAGE 1
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs General Description 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.
PAGE 2
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) SOT23 (derate 3.7mW/°C above +70°C) .................297.
PAGE 3
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs ELECTRICAL CHARACTERISTICS (continued) (VDD = 19V, VGND = 0V, VCM = VOUT = VDD/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Typical Operating Characteristics (continued) (VDD = 19V, GND = 0, VCM = VOUT = VDD/2, TA = +25°C, unless otherwise specified.) SUPPLY CURRENT vs. TEMPERATURE 7 IOUT (500mA/div) 6 MAX9650 toc06 MAX9650 toc05 MAX9650 toc04 8 SUPPLY CURRENT (mA) LOAD TRANSIENT SINKING LOAD TRANSIENT SOURCING IOUT (500mA/div) 5 4 0.1A RESPONSE 1A RESPONSE 3 VOUT (125mV/div) 2 VOUT (125mV/div) 0.5A RESPONSE 1 0.5A RESPONSE 1A RESPONSE 0.
PAGE 5
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Pin Description PIN MAX9650 SOT23 MAX9651 µMAX-EP, (µMAX-EP, TDFN-EP TDFN-EP) 1 6 1 2 4 3 3 4 NAME FUNCTION OUTA VCOM Output A 4 GND Ground 3 INA+ Positive Input A 2 2 INA- Negative Input A 5 7 8 VDD Positive-Supply Input. Bypass VDD to GND with a 0.1µF capacitor as close as possible to the device. — — 5 INB+ Positive Input B — — 6 INB- Negative Input B — — 7 OUTB VCOM Output B — 1, 5, 8 — N.C.
PAGE 6
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs 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.
PAGE 7
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Pin Configurations MAX9650 OUTA 1 + 5 VDD GND 2 INA+ 3 4 THIN SOT23 Maxim Integrated INA- + MAX9650 8 N.C. OUTA 1 2 7 VDD INA- 3 6 OUTA INA+ GND 4 5 N.C. N.C.
PAGE 8
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. 8 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
PAGE 9
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PAGE 10
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PAGE 11
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PAGE 12
MAX9650/MAX9651 High-Current VCOM Drive Op Amps for TFT LCDs Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. COMMON DIMENSIONS 12 PACKAGE VARIATIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.
PAGE 13
DS1086L 3.