lm2423te National Semiconductor Corporation, lm2423te Datasheet

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lm2423te

Manufacturer Part Number
lm2423te
Description
220v Monolithic Triple Channel 15 Mhz Crt Dtv Driver
Manufacturer
National Semiconductor Corporation
Datasheet
© 2006 National Semiconductor Corporation
LM2423TE
220V Monolithic Triple Channel 15 MHz CRT DTV Driver
General Description
The LM2423 is a triple channel high voltage CRT driver
circuit designed for use in DTV applications. The IC contains
three high input impedance, wide band amplifiers which
directly drive the RGB cathodes of a CRT. Each channel has
its gain internally set to −54 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 designed specifically to meet
high voltage spacing requirements. See Thermal Consider-
ations section.
Connection Diagram
See NS Package Number TE11B NOPB
Available only with lead free plating
Order Number LM2423TE
FIGURE 1. Top View
DS201171
20117101
Features
n 15 MHz bandwidth at 130V
n Current output for IK feedback systems
n Greater than 130V
n 0V to 5V input voltage range
n Stable with 0 pF–20 pF capacitive loads and inductive
n Convenient TO-220 staggered thin lead package style
Applications
n DC coupled DTV applications using the 480p format as
Schematic Diagram
peaking networks
well as standard NTSC and PAL formats.
FIGURE 2. Simplified Schematic Diagram
P-P
(One Channel)
output swing capability
P-P
output swing
November 2006
www.national.com
20117102

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lm2423te Summary of contents

Page 1

... See Thermal Consider- ations section. Connection Diagram FIGURE 1. Top View Order Number LM2423TE See NS Package Number TE11B NOPB Available only with lead free plating © 2006 National Semiconductor Corporation Features ...

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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 ( Storage Temperature Range ...

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AC Test Circuit Note load includes parasitic capacitance. Figure 3 shows a typical test circuit for evaluation of the LM2423. This circuit is designed to allow testing of the LM2423 in a 50Ω environment without the use of ...

Page 4

Typical Performance Characteristics (60V – 190V 50˚C, Test Circuit — Figure 3 unless otherwise specified) C FIGURE OUT FIGURE 5. LM2423 Pulse Response www.national.com (V = +220V , 20117104 IN 20117105 ...

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Typical Performance Characteristics (V = +220V CC +12V , pF 130V (60V – 190V OUT PP 50˚C, Test Circuit — Figure 3 unless otherwise specified) (Continued) FIGURE 8. Speed vs Offset , ...

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Typical Performance Characteristics (60V – 190V 60˚C, Test Circuit — Figure 3 unless otherwise specified) C FIGURE 10. Power Dissipation vs Frequency www.national.com (V = +220V , 201171010 FIGURE 11. Safe Operating Area FIGURE 12. ...

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Theory of Operation The LM2423 is a high voltage monolithic three channel CRT driver suitable for DTV applications. The LM2423 operates with 220V and 12V power supplies. The part is housed in the industry standard 11-lead TO-220 molded plastic power ...

Page 8

Application Hints (Continued) Figure 10 shows the maximum power dissipation of the LM2423 vs. Frequency when all three channels of the device are driving into load with a 130V pixel on, one pixel off. The graph assumes ...

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Application Hints (Continued) CURRENT OUTPUT FOR IK FEEDBACK SYSTEMS The LM2423 can be used in DTV applications that use an IK feedback system. Figure 14 shows an example of an inter- face circuit used to feed back the IK output ...

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www.national.com 10 ...

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Application Hints (Continued) FIGURE 15. LM2423 DTV Demonstration Board Layout 201171016 11 www.national.com ...

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Application Hints (Continued) FIGURE 16. Trace Routing and Component Placement for Blue Channel Output www.national.com 201171017 12 ...

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... Email: new.feedback@nsc.com Tel: 1-800-272-9959 Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 NS Package Number TE11B Order Number LM2423TE NOPB National Semiconductor Asia Pacific Customer Fax: +49 (0) 180-530 85 86 Support Center Email: europe.support@nsc.com Email: ap.support@nsc.com Tel: +44 (0) 870 24 0 2171 ...

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