lm2462ta National Semiconductor Corporation, lm2462ta Datasheet

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lm2462ta

Manufacturer Part Number
lm2462ta
Description
Monolithic Triple 3 Ns Crt Driver
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2002 National Semiconductor Corporation
LM2462
Monolithic Triple 3 ns CRT Driver
General Description
The LM2462 is an integrated high voltage CRT driver circuit
designed for use in color monitor applications. The IC con-
tains three high input impedance, wide band amplifiers
which directly drive the RGB cathodes of a CRT. Each
channel has its gain internally set to −20 and can drive CRT
capacitive loads as well as resistive loads present in other
applications, limited only by the package’s power dissipation.
The IC is packaged in an industry standard 11-lead TO-220
molded plastic power package. See Thermal Considerations
section.
Schematic and Connection Diagrams
FIGURE 1. Simplified Schematic Diagram
(One Channel)
DS200376
DS200376-1
Features
n Higher gain to match LM126X CMOS preamplifiers
n 0V to 3.75V input range
n Stable with 0–20 pF capacitive loads and inductive
n Convenient TO-220 staggered lead package style
n Maintains standard LM240X Family pinout which is
Applications
n 1600 x 1200 displays up to 85Hz refresh
n Pixel clock frequencies up to 230 MHz
n Monitors using video blanking
Note: Tab is at GND
peaking networks
designed for easy PCB layout
NS Package Number: TA11B
Order Number LM2462TA
Top View
DS200376-2
February 2002
www.national.com

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lm2462ta Summary of contents

Page 1

... Maintains standard LM240X Family pinout which is designed for easy PCB layout Applications n 1600 x 1200 displays up to 85Hz refresh n Pixel clock frequencies up to 230 MHz n Monitors using video blanking Note: Tab is at GND NS Package Number: TA11B DS200376-1 DS200376 February 2002 DS200376-2 Top View Order Number LM2462TA www.national.com ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Bias Voltage ( Input Voltage ( Storage Temperature Range (T ...

Page 3

AC Test Circuit Note load includes parasitic capacitance. Figure 2 shows a typical test circuit for evaluation of the LM2462. This circuit is designed to allow testing of the LM2462 environment without the use of ...

Page 4

Typical Performance Characteristics (25V−65V 60˚C, Test Circuit - Figure 2 unless otherwise specified) CASE FIGURE OUT FIGURE 4. Speed vs Temp. FIGURE 5. LM2462 Pulse Response T = 50˚C CASE www.national.com (V = +80V ...

Page 5

Theory of Operation The LM2462 is a high voltage monolithic three channel CRT driver suitable for high resolution display applications. The LM2462 operates with 80V and 12V power supplies. The part is housed in the industry standard 11-lead TO-220 molded ...

Page 6

Application Hints (Continued) FIGURE 9. One Channel of the LM2462 with the Recommended Arc Protection Circuit OPTIMIZING TRANSIENT RESPONSE Referring to Figure 9 , there are three components (R1, R2 and L1) that can be adjusted to optimize the transient ...

Page 7

Application Hints (Continued) NSC DEMONSTRATION BOARD Figure 12 shows the routing and component placement on the NSC LM126X/246X demonstration board. The sche- matic of the board is shown in Figure 10 and Figure 11 . This board provides a good ...

Page 8

Application Hints (Continued) FIGURE 10. LM126X/LM246X Demonstration Board Schematic www.national.com 8 DS200376-23 ...

Page 9

Application Hints (Continued) FIGURE 11. LM126X/LM246X Demonstration Board Schematic (continued) 9 DS200376-21 www.national.com ...

Page 10

Application Hints (Continued) FIGURE 13. Trace Routing and Component Placement for Blue Channel Output www.national.com FIGURE 12. LM126X/LM246X Demo Board Layout 10 DS200376-22 DS200376-20 ...

Page 11

... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted NS Package Number TA11B Order Number LM2462TA 2. A critical component is any component of a life support device or system whose failure to perform ...

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