LM2432TE/NOPB National Semiconductor, LM2432TE/NOPB Datasheet

LM2432TE/NOPB

Manufacturer Part Number
LM2432TE/NOPB
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2432TE/NOPB

Lead Free Status / RoHS Status
Compliant
© 2005 National Semiconductor Corporation
LM2432
220V Monolithic Single Channel 37 MHz HDTV CRT
Driver
General Description
The LM2432 is a single channel high voltage CRT driver
circuit designed for use in Rear-Projection and Direct-View
HDTV applications. The IC contains a high input impedance,
wide band amplifier which can be DC coupled to a cathode
of a CRT. The amplifier has its gain internally set to −53 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 a staggered 7-lead TO-220 molded
plastic power package designed specifically to meet high
voltage spacing requirements. See the section “Power Dis-
sipation and Heatsink Calculation” for more information.
Pinout Diagram
Note: Tab is at GND. Pin 6 is not connected (N/C) internally.
FIGURE 1. Simplified Connection and Pinout Diagram
Order Number LM2432TE
Top View
DS201377
20137702
Features
n 37 MHz bandwith at 110V
n 0V to 4V input range
n Greater than 130V
n IK Current Output (Pin 5) for IK feedback systems
n Stable with 0–20 pF capacitive loads and inductive
Applications
n For Rear-Projection and Direct-View DC coupled CRT
n Compatible with RGB video processors with IK feedback
Schematic Diagram
peaking networks
applications using up to 720p and 1080i HDTV formats
for automatic cathode calibration
FIGURE 2. Simplified Schematic Diagram
PP
output swing capability
PP
output swing
September 2005
www.national.com
20137701

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LM2432TE/NOPB Summary of contents

Page 1

... Pinout Diagram Note: Tab is at GND. Pin 6 is not connected (N/C) internally. Top View Order Number LM2432TE FIGURE 1. Simplified Connection and Pinout Diagram © 2005 National Semiconductor Corporation Features n 37 MHz bandwith at 110V input range n Greater than 130V n IK Current Output (Pin 5) for IK feedback systems n Stable with 0– ...

Page 2

... Absolute Maximum Ratings 3) 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 ( Voltage ( Storage Temperature Range (T ) STG Lead Temperature < (Soldering, 10 sec.) ESD Tolerance, Human Body Model ...

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AC Test Circuit Note: 10pF load includes parasitic capacitance. Figure 3 shows a typical test circuit for evaluation of the LM2432. This circuit was designed to test the transient response of the LM2432 in a 50Ω environment without the use ...

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Typical Performance Characteristics − 190V), Test Circuit - Figure 3, unless otherwise specified) FIGURE OUT FIGURE 5. LM2432 Pulse Response FIGURE 6. Bandwidth www.national.com (V = +220V 20137704 FIGURE 7. Speed vs Load Capacitance ...

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Typical Performance Characteristics − 190V), Test Circuit - Figure 3, unless otherwise specified) (Continued +220V FIGURE 10. Power Dissipation vs Frequency FIGURE 11. Power Derating Curve FIGURE 12. Cathode Pulse Response 5 = +12V ...

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... Systems” for more information on the usage and pro- tection of the IK output. 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 fol- lowing information is provided in order to support this com- mitment ...

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Application Hints (Continued) FIGURE 13. Recommended Application Circuit EFFECT OF LOAD CAPACITANCE Figure 7 shows the effect of increased load capacitance on the speed of the device. The rise and fall time increase by 7% and 7.5%, respectively, per additional ...

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Application Hints (Continued) Tips for Reducing Power Dissipation The following methods can be used to reduce the power dissipated by the LM2432 in order to optimize heatsink size and cost: • Use a lower V supply voltage while maintaining suffi- ...

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... J6 and J7. This board provides a good example of a layout that can be used as a guide for future layouts. Samples of the NSC demonstration neck board are available upon request to your local National Semiconductor Sales or a lower Office. BB ...

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Application Hints (Continued) ever, it was decided to preserve the TV’s original RGB mainboard circuitry (the PNP buffer) and use two NPN tran- sistors on the neck board. The input stage from the RGB processor to the LM2432 will be ...

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11 www.national.com ...

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Application Hints (Continued) www.national.com FIGURE 17. LM2432 Demonstration Board Layout (slightly enlarged for more detail) 12 20137713 ...

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... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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