LM2445

LM2445 Monolithic Triple 7.5 ns CRT Driver March 2003 LM2445 Monolithic Triple 7.5 ns CRT Driver General Description The LM2445 is an integrated high voltage CRT driver circuit designed for use in color monitor 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 −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 9-lead TO-220 molded plastic power package. See the Thermal Considerations section for more information. 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 peaking networks n Convenient TO-220 staggered lead package style n Maintains standard LM243X Family pinout which is designed for easy PCB layout Applications n 1024 x 768 displays up to 85 Hz refresh n Pixel clock frequencies up to 95 MHz n Monitors using video blanking Schematic Diagram 20063701 FIGURE 1. Simplified Schematic Diagram (One Channel) © 2003 National Semiconductor Corporation DS200637 www.national.com LM2445 Connection Diagram 20063702 Note: Tab is at GND Top View Order Number LM2445TA www.national.com 2 LM2445 Absolute Maximum Ratings 3) (Notes 1, Machine Model 250V If Military/Aerospace specified devices are required, please contact the Na...