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LM5020SDX-1 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM5020SDX-1 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 12 page  LM5020 100V Current Mode PWM Controller General Description The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing in- herent line feed-forward. The LM5020 includes a high- voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Addi- tional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages. Features n Internal Start-up Bias Regulator n Error Amplifier n Precision Voltage Reference n Programmable Softstart n 1A Peak Gate Driver n Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2) n Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis n Cycle-by-Cycle Over-Current Protection n Slope Compensation (LM5020-1) n Programmable Oscillator Frequency with Synchronization Capability n Current Sense Leading Edge Blanking n Thermal Shutdown Protection Packages n MSOP-10 n LLP-10 (4 mmx4mm) Connection Diagram Top View 20095001 10-Lead MSOP, LLP Ordering Information Order Number Description NSC Package Drawing Supplied As LM5020MM-1 MSOP, 80% Duty Cycle Limit MUB-10A 1000 Units on Tape and Reel LM5020MMX-1 MSOP, 80% Duty Cycle Limit MUB-10A 3500 Units on Tape and Reel LM5020SD-1 LLP, 80% Duty Cycle Limit SDC-10A 1000 Units on Tape and Reel LM5020SDX-1 LLP, 80% Duty Cycle Limit SDC-10A 4500 Units on Tape and Reel LM5020MM-2 MSOP, 50% Duty Cycle Limit MUB-10A 1000 Units on Tape and Reel LM5020MMX-2 MSOP, 50% Duty Cycle Limit MUB-10A 3500 Units on Tape and Reel LM5020SD-2 LLP, 50% Duty Cycle Limit SDC-10A 1000 Units on Tape and Reel LM5020SDX-2 LLP, 50% Duty Cycle Limit SDC-10A 4500 Units on Tape and Reel October 2004 © 2004 National Semiconductor Corporation DS200950 www.national.com |
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