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LM2476 Datasheet

  • LM2476

  • National Semiconductor [Monolithic Triple Channel 6.5 ns Hi...

  • NSC

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LM2476 Monolithic Triple Channel 6.5 ns High Gain CRT Driver and Bias Clamp
January 2004
LM2476
Monolithic Triple Channel 6.5 ns High Gain CRT Driver
and Bias Clamp
General Description
The LM2476 is a monolithic triple channel CRT driver and
triple bias clamp for low-cost color monitor applications. The
highly integrated IC contains three wide-band amplifiers for
driving the RGB cathodes of a CRT through external cou-
pling capacitors and three low-band clamp amplifiers for DC
restoration and cutoff adjustment of the video outputs. The
CRT drivers have a high, fixed gain of -27 and can drive CRT
capacitive loads as well as resistive loads present in other
applications, limited only by the package鈥檚 power dissipation.
The IC is packaged in a 19-lead TO-247 molded plastic
package and must be operated with a properly chosen heat
sink. See the Package Mounting and Thermal Consider-
ations sections for more information.
n
Convenient TO-247 staggered lead package style
CRT Drivers
n
High gain of 鈥?7 for up to 60V
P-P
output swing
n
Stable with capacitive loads and inductive peaking
networks
Bias Clamps
n
Gain of 鈥?7 for up to 60V DC output range
Applications
n
1024 x 768 displays up to 85 Hz refresh rate
n
Pixel clock frequencies up to 95 MHz
n
Monitors using video blanking
Features
n
Well-matched to the LM123X/4X family of preamplifiers
n
Operates with V
CC
= 60V to 90V
Pinout Diagram and Pin Descriptions
Pin Name
IND
INC
V
BB
V
CC
GND*
OUTC
OUTD
Pin Description
Driver Input Pins (1, 3, 4)
Clamp Input Pins (6, 7, 8)
Bias Voltage Pin (2)
Supply Voltage Pin (14)
Ground Pins (5, 10, 12, 16, 18)
Clamp Output Pins (9, 11, 13)
Driver Output Pins (15, 17, 19)
*Note: All GND pins should be connected together via low HF impedance
traces on the PCB.
20121901
Note:
Tab is at GND
FIGURE 1. Pinout and Connection Diagram
漏 2005 National Semiconductor Corporation
DS201219
www.national.com

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