MAX9651AUA+ [MAXIM]
High-Current VCOM Drive Op Amps for TFT LCDs; 大电流VCOM驱动运算放大器，用于TFT LCD
| 型号： | MAX9651AUA+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | High-Current VCOM Drive Op Amps for TFT LCDs |
| 文件： | 总13页 (文件大小：424K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4187; Rev 4; 7/10
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
General Description
Features
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.
♦ 1300mA Peak Output Current
♦ Rail-to-Rail Inputs and Outputs
♦ Operates 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.
♦ 40V/µs Slew Rate
♦ 35MHz Bandwidth
The MAX9650/MAX9651 feature 40V/µs slew rate and
35MHz bandwidth to quickly settle outputs for 120Hz
frame rate and full HD television.
♦ 5mA Quiescent Current per Channel
♦ Excellent Heat Dissipation (Exposed Pad)
The MAX9650/MAX9651 feature output short-circuit
protection and thermal shutdown. These devices are
available in exposed pad packages for excellent heat
dissipation.
Ordering Information
AMPS PER PIN-
PACKAGE PACKAGE
PART
TOP MARK
Applications
MAX9650AZK+
MAX9650AZK/V+
MAX9650AUA+
MAX9650ATA+
MAX9651AUA+
MAX9651ATA+
1
1
1
1
2
2
5 SOT23
ADSI
ADSK
AABI
BKX
TFT-LCD Panels
5 SOT23
Instrument Control Voltage Sources
8 µMAX-EP*
8 TDFN-EP*
8 µMAX-EP*
8 TDFN-EP*
AABH
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.
Typical Operating Circuit
16V
V
DD
MAX9650
TFT LCD
IN_+
IN_-
V
REF
OUT_
*R
S
TFT-LCD
CAPACITANCE
GND
*R MAY BE NEEDED FOR SOME APPLICATIONS.
S
________________________________________________________________ Maxim Integrated Products
1
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.
High-Current VCOM Drive Op Amps
for TFT LCDs
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
to GND) ................................-0.3V to +22V
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
Soldering Temperature (reflow) .......................................+260°C
DD
Any Other Pin to GND ................................-0.3V to (V
IN_+/IN_- (current)............................................................ 20mA
OUT_ (current) ......................................................................1.3A
Continuous Power Dissipation (T = +70°C)
A
+ 0.3V)
DD
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
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
(V
= 19V, V
= 0V, V
= V
= V /2, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
DD
GND
CM
OUT
DD
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
20
UNITS
V
0/MAX9651
Supply Voltage Range
Quiescent Current
V
Guaranteed by PSRR
Per channel
6
DD
DD
I
3.7
8
mA
V
0.30
-
V
0.05
-
DD
DD
High Output Voltage
Low Output Voltage
Input Offset Voltage
V
I
= +5mA, V = V
DD
V
V
OH
H
IN
V
V
I = -5mA, V = 0V
L
0.05
3.5
0.30
+14
+17
OL
IN
T
= +25°C
-14
-17
A
mV
OS
T
= -40°C to +125°C
A
I
I
= 0mA to -80mA
= 0mA to +80mA
+0.2
-0.2
OUT
OUT
Load Regulation
LR
mV/mA
Input Bias Current
Voltage Gain
I
At V = 9.5V
0.01
1
µA
V/V
dB
FB
IN
A
R = 10kΩ, C = 50pF
L
0.99
70
1.01
V
L
Power-Supply Rejection Ratio
PSRR
CMVR
CMRR
V
= 6V to 20V, V
= V = 3V
OUT
95
80
DD
CM
Common-Mode Input Voltage
Range
V
-
DD
0.5
Inferred from CMRR test
0.5
V
Common-Mode Rejection Ratio
0.5V ≤ V
≤ V
- 0.5V
60
20
80
dB
CM
DD
MAX9650AZK+
MAX9650AUA+
MAX9650ATA+
V
= 9.5V
OUT
(Note 2)
Continuous Output Current
I
mA
O
V
= 15V, V
= 7.5V
350
1.3
35
DD
OUT
Transient Peak Output Current
Bandwidth
I
PK
(Note 3)
-3dB
A
BW
SR
MHz
V/µs
Slew Rate
4V step, C = 50pF, R = 10kΩ, A = +1V/V
40
L
L
V
Settling to 0.1% of V
, I = 0 to 1000mA,
L
OUT
Settling Time
t
2.0
µs
S
R
S
= 2.2Ω, C = 0.1µF (Figure 1)
S
2
_______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 19V, V
= 0V, V
= V
= V /2, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
GND
CM
OUT
DD
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
150
100
100
3
MAX
UNITS
nF
Maximum Load Capacitance
Noninverting Input Resistance
Inverting Input Resistance
Input Capacitance
C
(Note 4)
(Note 5)
(Note 5)
LOAD
R
IN+
MΩ
MΩ
pF
R
IN-
C
IN
Thermal Shutdown
+170
15
°C
Thermal Shutdown Hysteresis
°C
Note 1: All devices are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.
A
Note 2: Continuous output current is tested with one output at a time.
Note 3: See the Thermal Shutdown with Temperature Hysteresis section.
Note 4: 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.
Typical Operating Characteristics
(V
= 19V, GND = 0, V
= V
= V /2, T = +25°C, unless otherwise specified.)
OUT DD A
DD
CM
INPUT OFFSET VOLTAGE DEVIATION
vs. SUPPLY VOLTAGE
INPUT OFFSET VOLTAGE DEVIATION
vs. TEMPERATURE
LOAD TRANSIENT
SOURCING
8
7
6
5
4
3
2
1
0
4
3
T
A
= +125°C
I
2
OUT
(500mA/div)
1
0
0.1A RESPONSE
T
A
= +25°C
-1
-2
-3
-4
V
OUT
T
A
= -40°C
(125mV/div)
0.5A RESPONSE
1A RESPONSE
TIME (1μs/div)
6
9
12
15
18
21
-50 -25
0
25
50
75 100 125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
High-Current VCOM Drive Op Amps
for TFT LCDs
Typical Operating Characteristics (continued)
(V
= 19V, GND = 0, V
= V
= V /2, T = +25°C, unless otherwise specified.)
OUT DD A
DD
CM
SUPPLY CURRENT
vs. TEMPERATURE
LOAD TRANSIENT
SOURCING
LOAD TRANSIENT
SINKING
8
7
6
5
4
3
2
1
0
I
OUT
(500mA/div)
I
OUT
(500mA/div)
0.1A RESPONSE
1A RESPONSE
0.5A RESPONSE
V
OUT
V
OUT
(125mV/div)
(125mV/div)
0.5A RESPONSE
1A RESPONSE
0.1A RESPONSE
TIME (1μs/div)
TIME (1μs/div)
-50 -25
0
25
50
75 100 125
0/MAX9651
TEMPERATURE (°C)
OPEN-LOOP GAIN AND PHASE
vs. FREQUENCY
MAX9650 STEP RESPONSE
WITH VARIOUS C
STARTUP WAVEFORM
L
MAX9650 toc07
MAX9650 toc09
MAX9650 toc08
360
300
240
180
120
60
120
100
GAIN
C = 100pF
L
I
DD
V
OUT
C = 10pF
L
10mA/div
5V/div
80
60
V
DD
V
OUT
C = 2200pF
L
10V/div
40
5V/div
20
PHASE
0
0
C = 0.01μF
L
V
IN
V
OUT
-60
-120
-180
-240
-20
-40
-60
-80
5V/div
5V/div
V
OUT
V
OUT
C
L
= 0.022μF
5V/div
5V/div
100ms/div
10E+0
1E+3
100E+3
10E+6
2μs/div
100E+0
1E+6
FREQUENCY (Hz)
100E+6
10E+3
CLOSED-LOOP SMALL-SIGNAL FREQUENCY
SMALL-SIGNAL GAIN
vs. FREQUENCY
SMALL-SIGNAL GAIN vs. FREQUENCY
RESPONSE FOR VARIOUS C
WITH VARIOUS C
L
L
20
15
10
5
20
15
10
5
3
2
10,000pF
V
= 100mV
P-P
V
= 100mV
OUT
OUT
P-P
DD
C = 0.0022μF
L
R = 10kΩ TO V /2
L
R = 10kΩ TO V /2
L
DD
1
C = 0.01μF
L
1000pF
0
C = 0.001μF
L
C = 0.1μF
100pF
L
-1
-2
-3
-4
-5
-6
-7
0
C = 560pF
L
-5
C = 10pF
L
0
-10
-15
-20
-25
10pF
-5
C = 100pF
L
-10
-15
C = 56pF
L
100E+3
1E+6
10E+6
100E+6
0.01
0.1
1
10
100
100E+3
1E+6
10E+6
100E+6
FREQUENCY (Hz)
FREQUENCY (MHz)
FREQUENCY (Hz)
4
_______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
Pin Description
PIN
MAX9650
MAX9651
(µMAX-EP,
TDFN-EP)
NAME
FUNCTION
µMAX-EP,
TDFN-EP
SOT23
1
2
3
4
6
4
3
2
1
4
3
2
OUTA VCOM Output A
GND
INA+
INA-
Ground
Positive Input A
Negative Input A
Positive-Supply Input. Bypass V
possible to the device.
to GND with a 0.1µF capacitor as close as
DD
5
7
8
V
DD
—
—
—
—
—
—
5
6
INB+
INB-
Positive Input B
Negative Input B
—
7
OUTB VCOM Output B
1, 5, 8
—
N.C.
No Connection. Not internally connected.
Exposed Pad (μMAX and TDFN Only). EP is internally connected to GND. Connect EP
to GND.
—
—
—
EP
Detailed Description
19V
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 cur-
rent quickly (1.3A) into a capacitive load such as the
backplane of a TFT-LCD panel.
SUPPLY
*C2 = 0.1μF
19V
SUPPLY
*C1 = 10μF
V
DD
Thermal Shutdown
with Temperature Hysteresis
MAX9650
LCD VCOM LOAD
V
REF
IN_+
IN_-
C
0.1μF
=
LCD
R
S
=
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 dissi-
pation is low and the chip does not shut down.
2.2Ω
V
OUT_
OUT_
**0V TO 2.2V
AT 50kHz
GND
*10μF and 0.1μF CAPACITORS AS CLOSE AS POSSIBLE TO THE PIN.
**(R = R ) x C x 6 < 2μs, WHERE R = GENERATOR SOURCE IMPEDANCE.
S
GEN
LCD
GEN
Figure 1. Settling Time Test Circuit
_______________________________________________________________________________________
5
High-Current VCOM Drive Op Amps
for TFT LCDs
transient loads. The MAX9650/MAX9651 require a mini-
mum 10µF (C1) and 0.1µF (C2) power-supply bypass
capacitors placed as close as possible to the power-
supply pin (V ). See Figure 3. For dual-supply opera-
DD
tion, use 10µF and 0.1µF bypass capacitors on both
Applications Information
Output Load
The MAX9650/MAX9651 are designed to drive capaci-
tive 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 addi-
tional physical resistor is necessary. For minimum
series resistance required for stability with capacitive
loading, see Figure 2.
supplies (V
and GND) with each capacitor placed as
DD
close as possible to V
and GND.
DD
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 sup-
ply or it can be left unconnected.
Power Supplies and Bypass Capacitors
The MAX9650/MAX9651 operate from a 6V to 20V sin-
gle supply or from 4.5V to 10V dual supplies. Proper
supply bypassing ensures stability while driving high
0/MAX9651
16V
SUPPLY
2.0
1.8
1.6
*C2 = 0.1μF
19V
SUPPLY
*C1 = 10μF
V
DD
1.4
STABLE
1.2
1.0
0.8
0.6
MAX9650
TFT LCD
V
REF
IN_+
IN_-
OUT_
**R
S
TFT-LCD
0.4
CAPACITANCE
UNSTABLE
0.2
GND
0
-7
-6
-5
-4
10
10
10
10
*10μF and 0.1μF CAPACITORS AS CLOSE AS POSSIBLE TO THE PIN.
**R MAY BE NEEDED FOR SOME APPLICATIONS.
CAPACITANCE (F)
S
Figure 2. Minimum Combined ESR/Series/Trace Resistance
Required for Stability of the MAX9650 in Response to
Capacitive Loads
Figure 3. Typical TFT-LCD Backplane Drive Circuit
Chip Information
PROCESS: BiCMOS
µMAX is a registered trademark of Maxim Integrated Products, Inc.
6
_______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
Pin Configurations
OUTA
INA-
INA+
GND
1
2
3
4
N.C.
INA-
INA+
GND
1
2
3
4
8
7
6
5
N.C.
8
7
6
5
V
DD
+
+
MAX9650
MAX9650
MAX9651
OUTA
GND
1
2
5
4
V
DD
+
V
OUTB
INB-
DD
OUTA
N.C.
INA+
3
INA-
INB+
THIN SOT23
μMAX-EP
(TDFN-EP)
μMAX-EP
(TDFN-EP)
_______________________________________________________________________________________
7
High-Current VCOM Drive Op Amps
for TFT LCDs
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.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.
LAND
PATTERN NO.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
90-0241
5 SOT23
8 µMAX
Z5+2
U8E+2
T833+2
21-0113
21-0107
21-0137
90-0145
90-0058
8 TDFN-EP
0/MAX9651
8
_______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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.
_______________________________________________________________________________________
9
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. 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.
0/MAX9651
1
21-0107
C
1
10 ______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.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.
______________________________________________________________________________________ 11
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. 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.
PACKAGE VARIATIONS
COMMON DIMENSIONS
SYMBOL MIN. MAX.
PKG. CODE
T633-2
N
6
8
8
D2
E2
e
JEDEC SPEC
MO229 / WEEA
MO229 / WEEC
MO229 / WEEC
b
[(N/2)-1] x e
1.50 0.10 2.30 0.10 0.95 BSC
1.50 0.10 2.30 0.10 0.65 BSC
1.50 0.10 2.30 0.10 0.65 BSC
0.40 0.05 1.90 REF
0.30 0.05 1.95 REF
0.30 0.05 1.95 REF
A
D
0.70
2.90
2.90
0.00
0.20
0.80
3.10
3.10
0.05
0.40
T833-2
T833-3
E
T1033-1
T1033MK-1
T1033-2
T1433-1
T1433-2
T1433-3F
10 1.50 0.10 2.30 0.10 0.50 BSC MO229 / WEED-3 0.25 0.05 2.00 REF
10 1.50 0.10 2.30 0.10 0.50 BSC MO229 / WEED-3 0.25 0.05 2.00 REF
10 1.50 0.10 2.30 0.10 0.50 BSC MO229 / WEED-3 0.25 0.05 2.00 REF
A1
L
k
0.25 MIN.
0.20 REF.
14 1.70 0.10 2.30 0.10 0.40 BSC
14 1.70 0.10 2.30 0.10
14 1.70 0.10 2.30 0.10 0.40 BSC
- - - -
- - - -
- - - -
0.20 0.05 2.40 REF
0.20 0.05 2.40 REF
A2
0.40 BSC
6
0.20 0.05
2.40 REF
12 ______________________________________________________________________________________
High-Current VCOM Drive Op Amps
for TFT LCDs
0/MAX9651
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
DESCRIPTION
CHANGED
0
1
2
7/08
10/08
5/09
Initial release
—
Updated slew rate and added TDFN-EP package
Updated continuous output current specification
1, 2, 6, 10, 11
2
Added automotive part to Ordering Information, corrected units for input offset
voltage, and added figure for minimum series resistance
3
4
2/10
7/10
1, 2, 5, 6
2, 4
Removed extraneous information in the Electrical Characteristics table and
corrected typo in TOC 5
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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