Document
BUF05704, BUF06704 BUF07704, BUF11704
SBOS277F − JUNE 2004 − REVISED DECEMBER 2007
18-V SUPPLY MULTI-CHANNEL GAMMA CORRECTION BUFFER
FEATURES
D Wide Supply Range: 4.5 V to 18 V D Gamma Correction Channels: 10, 6, and 4 D Integrated VCOM Buffer D Excellent Output Current Drive:
− Gamma Channels: > 30 mA at 0.5 V Swing to Rails(1)
− VCOM: > 100 mA typ at 2 V Swing to Rails(1)
D Large Capacitive Load Drive Capability D Rail-to-Rail Output D PowerPAD Package D Low-Power/Channel: < 500 µA D High ESD Rating: 8 kV HBM, 2 kV CDM,
300 V MM
D Specified for −25°C to +85°C
(1) See Typical Characteristic curves for details.
V DD
BUFxx704
So urce Driver
Gamma 1
Gamma 2
Gamma 3
Gamma (n − 2) Gamma (n − 1) Gamma (n)
DESCRIPTION
The BUFxx704 are a series of multi-channel buffers targeted towards gamma correction in high-resolution LCD panels. They are pin-compatible with the existing BUFxx702 and BUFxx703 families and operate at higher supply voltages up to 18 V (19 V absolute max). The higher supply voltage enables faster response times and brighter images in large-screen LCD panels. This is especially important in LCD TV applications.
The number of gamma correction channels required depends on a variety of factors and differs greatly from design to design. Therefore, 10, 6, and 4 channel options are offered. For additional space and cost savings, a VCOM channel with > 100mA drive capability is integrated into the BUF11704, BUF07704, and BUF05704.
The BUF11704, BUF07704, BUF06704, and BUF05704 are available in the TSSOP-28, TSSOP-20, TSSOP-16, and TSSOP-14 PowerPAD packages for dramatically increased power dissipation capability. This way, a large number of channels can be handled safely in one package.
A flow-through pinout has been adopted to allow simple PCB routing and maintain the cost-effectiveness of this solution. All inputs and outputs of the BUFxx704 incorporate internal ESD protection circuits that prevent functional failures at voltages up to 8 kV (HBM), 2 kV (CDM), and 300 V (MM).
MODEL
BUF11704 BUF07704 BUF06704 BUF05704
GAMMA CHANNELS
10 6 6 4
VCOM CHANNELS
1 1 0 1
VCOM
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments Incorporated. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2004−2007, Texas Instruments Incorporated
www.ti.com
BUF05704, BUF06704 BUF07704, BUF11704
SBOS277F − JUNE 2004 − REVISED DECEMBER 2007
www.ti.com
ABSOLUTE MAXIMUM RATINGS(1)
Over operating free-air temperature range unless otherwise noted
PARAMETERS Supply Voltage, VDD(2) Input Voltage Range, VI Continuous Total Power Dissipation
BUFxx704
UNIT
19
V
±VDD See Dissipation Rating Table
Operating Free-Air Temperature Range, TA Maximum Junction Temperature, TJ Storage Temperature Range, TSTG Lead Temperature 1.6mm (1/16 inch) from Case for 10s
−25 to 85
°C
125
°C
−65 to 150
°C
260
°C
ESD Rating:
Human Body Model (HBM)
8
kV
Charged-Device Model (CDM)
2
kV
Machine Model (MM)
300
V
(1) 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 under recommended operating conditions is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) All voltage values are with respect to GND.
ORDERING INFORMATION(1)
PRODUCT
PACKAGE-LEAD
PACKAGE MARKING
BUF05704
TSSOP-14
BUF05704
BUF06704
TSSOP-16
BUF06704
BUF07704
TSSOP-20
BUF07704
BUF11704
TSSOP-28
BUF11704
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
DISSIPATION RATING TABLE
PACKAGE TYPE TSSOP-28
PACKAGE DESIGNATOR
PWP (28)
θJC(1) (°C/W)
0.72
TSSOP-20
PWP (20)
1.40
TSSOP-16
PWP (16)
2.07
TSSOP-14
PWP (14)
2.07
(1) PowerPAD attached to PCB, 0 lfm airflow, and 76mm x 76mm copper area.
qJA(1) (°C/W)
27.9 32.63 36.51 37.47
TA ≤ 25°C POWER RATING
3.58 W 3.06 W
2.74 2.67
RECOMMENDED OPERATING CONDITIONS
Supply Voltage, VDD Operating Free-Air Temperature, TA
MIN NOM MAX UNIT
7
18 V
−25
+85 °C
2
www.ti.com
EQUIVALENT SCHEMATICS OF INPUTS AND OUTPUTS
BUF05704, BUF06704 BUF07704, BUF11704
SBOS277F − JUNE 2004 − REVISED DECEMBER 2007
INPUT STAGE OF BUFFERS
BUF11704: 1 to 5 and VCOM BUF07704: 1 to 3 and VCOM
BUF06704: 1 to 3
BUF05704: 1 to 2 and VCOM VS
Buffer Input
Next Stage Next Stage
Buff.