Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2476 Datenblatt(PDF) 7 Page - Texas Instruments |
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LM2476 Datenblatt(HTML) 7 Page - Texas Instruments |
7 / 16 page OBSOLETE LM2476 www.ti.com SNOSAH7B – JANUARY 2004 – REVISED APRIL 2013 THEORY OF OPERATION The LM2476 is a high voltage monolithic three channel CRT driver and triple bias clamp suitable for low-cost color monitor applications. The LM2476 operates with 85V and 8V power supplies. The part is housed in the 19- lead TO-220 molded plastic power package. The pinout and internal connection diagram is shown in . The CRT Driver circuit diagram is shown in . The PNP emitter follower, Q5, provides input buffering. Q1 and Q2 form a fixed gain cascode amplifier with resistors R1 and R2 setting the gain at −27. Emitter followers Q3 and Q4 isolate the high output impedance of the cascode stage from the capacitance of the CRT cathode which decreases the sensitivity of the device to load capacitance. Q6 provides biasing to the output emitter follower stage to reduce crossover distortion at low signal levels. The typical driver DC transfer function is shown in Figure 4. The Bias Clamp circuit diagram is shown in Figure 2. The clamp circuit amplifies the DC inputs, VINC, by the internally fixed gain of –16.5. Each clamp output, VOUTC, will require a pull-up resistor to VCC. The typical clamp DC transfer function is shown in Figure 5. Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM2476 |
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