LM2437T/NOPB National Semiconductor, LM2437T/NOPB Datasheet

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LM2437T/NOPB

Manufacturer Part Number
LM2437T/NOPB
Description
IC DRIVER MONOLITHIC TO-220-9
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2437T/NOPB

Display Type
CRT
Current - Supply
34.5mA
Voltage - Supply
60 V ~ 85 V
Operating Temperature
-20°C ~ 100°C
Mounting Type
Through Hole
Package / Case
TO-220-9 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Configuration
-
Digits Or Characters
-
Other names
*LM2437T
*LM2437T/NOPB
LM2437T
© 1999 National Semiconductor Corporation
LM2437
Monolithic Triple 7.5 ns CRT Driver
General Description
The LM2437 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 chan-
nel has its gain internally set to −14 and can drive CRT ca-
pacitive loads as well as resistive loads present in other ap-
plications, limited only by the package’s power dissipation.
The IC is packaged in an industry standard 9-lead TO-220
molded plastic power package. See Thermal Considerations
section.
Schematic and Connection Diagrams
FIGURE 1. Simplified Schematic Diagram
(One Channel)
DS100932
DS100932-1
Features
n Well matched with LM1279 video preamp
n 0V to 4.5V input range
n Stable with 0–20 pF capacitive loads and inductive
n Convenient TO-220 staggered lead package style
n Standard LM243X Family Pinout which is designed for
Applications
n 1024 x 768 displays up to 85 Hz refresh
n Pixel clock frequencies up to 100 MHz
n Monitors using video blanking
Note: Tab is at GND
peaking networks
easy PCB layout
Order Number LM2437T
Top View
DS100932-2
www.national.com
August 1999

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LM2437T/NOPB Summary of contents

Page 1

... See Thermal Considerations section. Schematic and Connection Diagrams FIGURE 1. Simplified Schematic Diagram (One Channel) © 1999 National Semiconductor Corporation DS100932 Features n Well matched with LM1279 video preamp 4.5V input range n Stable with 0–20 pF capacitive loads and inductive ...

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 ) STG Electrical Characteristics (See Figure 2 for Test Circuit) Unless otherwise noted +80V, V ...

Page 3

Typical Performance Characteristics (25V−65V), Test Circuit - Figure 2 unless otherwise specified) DS100932-4 FIGURE OUT IN DS100932-5 FIGURE 4. Speed vs Temp. DS100932-6 FIGURE 5. LM2437 Pulse Response ( +12 ...

Page 4

... The input signal from the generator is ac coupled to the base of Q5. Application Hints INTRODUCTION National Semiconductor (NSC) is committed to provide ap- plication information that assists our customers in obtaining the best performance possible from our products. The follow- ing information is provided in order to support this commit- ment ...

Page 5

Application Hints (Continued) FIGURE 9. One Channel of the LM2437 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 6

Application Hints (Continued) good example of a layout that can be used as a guide for fu- ture layouts. Note the location of the following components: • C55 — V bypass capacitor, located very close to pin 4 CC and ...

Page 7

Application Hints (Continued) 7 www.national.com ...

Page 8

Application Hints (Continued) FIGURE 11. LM1279/243X Demo Board Layout www.national.com 8 DS100932-13 ...

Page 9

Application Hints (Continued) FIGURE 12. Trace Routing and Component Placement for Blue Channel Output DS100932-14 9 www.national.com ...

Page 10

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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