LM2423TE/NOPB National Semiconductor, LM2423TE/NOPB Datasheet

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LM2423TE/NOPB

Manufacturer Part Number
LM2423TE/NOPB
Description
IC CRT DTV DRIVER 15MHZ TO220-11
Manufacturer
National Semiconductor
Datasheet

Specifications of LM2423TE/NOPB

Display Type
CRT
Current - Supply
21mA
Voltage - Supply
100 V ~ 230 V
Mounting Type
Through Hole
Package / Case
TO-220-11 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Interface
-
Configuration
-
Digits Or Characters
-
Other names
LM2423TE
© 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

Related parts for LM2423TE/NOPB

LM2423TE/NOPB Summary of contents

Page 1

... 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 n 15 MHz bandwidth at 130V n Current output for IK feedback systems n Greater than 130V input voltage range n Stable with 0 pF– ...

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 ( Storage Temperature Range (T ) STG Lead Temperature < (Soldering, 10 sec.) ESD Tolerance, Human Body Model Machine Model Junction Temperature θ ...

Page 3

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 ...

Page 5

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 , ...

Page 6

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. ...

Page 7

... 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 fol- lowing information is provided in order to support this com- mitment ...

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 ...

Page 9

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 ...

Page 10

www.national.com 10 ...

Page 11

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

Page 12

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

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... National Semiconductor and the National Semiconductor logo are trademarks or registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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