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LM5020 -
100V Current Mode PWM Controller from the PowerWise® Family
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Features
| • | Internal Start-up Bias Regulator |
| • | Error Amplifier |
| • | Precision Voltage Reference |
| • | Programmable Softstart |
| • | 1A Peak Gate Driver |
| • | Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2) |
| • | Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis |
| • | Cycle-by-Cycle Over-Current Protection |
| • | Slope Compensation (LM5020-1) |
| • | Programmable Oscillator Frequency with Synchronization Capability |
| • | Current Sense Leading Edge Blanking |
| • | Thermal Shutdown Protection |
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. More...
Applications
| • | Telecommunication Power Converters |
| • | Industrial Power Converters |
| • | +42V Automotive Systems |
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Typical Application
See Datasheet for Application Information
Parametric Table
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Parametric Table
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Typical Performance
*click for larger image
VCC Voltage vs Current
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Also Recommended
| LM5021 | No Internal Start-Up Regualtor |
| LM5030 | 100V PWM Controller For Push-Pull And Bridge Topologies |
| LM5104 | 100V Dual High-Side / Low-Side Mosfet Driver |
| LM5110 | Dual High Current (5A) Low-Side Mosfet Driver |
Additional Resources
Online Seminars
Design Tools (see below)
Application Notes (see below)
Block Diagram
*click for larger image
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Datasheet
Package Availability, Models, Samples & Pricing
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 inherent 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. Additional 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.
Design Tools
| Title | Size in Kbytes |
Date |
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| Power Reference Design Library |
0 Kbytes |
28-Mar-2006 |
View |
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| LM5020 PSPICE model |
578 Kbytes |
17-Apr-2009 |
View |
Download |
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Reference Designs
| • | LM5020 Reference Design - Flyback Triple Output Converter: 10.8-13.2V Input, 100V @ 35 mA; 36V @ 40 mA; 52V @ 45 mA Outputs | | • | LM5020 Reference Design - Boost Converter, High Output Current: 6-20V Input, 20V @ 5A Output | | • | LM5020 Reference Design - Boost Converter with 39W Output: 12V Input, 26V @ 1.5A Output | | • | LM5020 Reference Design - Buck-Boost Converter, 20W, Negative Voltage to Positive Voltage Output: -48V Input, 13.5V @ 1.5A Output | | • | LM5020 Reference Design - 1 Lumileds LUXEON High Brightness LED, 900 mA with Dimming Control Output | | • | LM5020 Reference Design - Sepic Converter, Wide Input Range: 11.4-28V Input, 18V @ 0.2A Output | | • | RD-136 - LM5020 Reference Design - Dual Output Flyback Converter with isolated outputs of 5V@0.2A and 12V@2.1A. Two LM2736Y's provide an additional output of 3.3V@0.5A and 5V@0.5A |
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1314: Application Note 1314 LM5020 Evaluation Board |
612 Kbytes |
10-Feb-05 |
Download |
| AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge |
230 Kbytes |
2-Jul-08 |
Download |
| AN-1574: Application Note 1574 LM5073 Evaluation Board |
464 Kbytes |
24-Apr-07 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1387: Application Note 1387 LM5026 Evaluation Board |
721 Kbytes |
7-Sep-05 |
Download |
AN-1387 (Chinese): Application Note 1387 LM5026 Evaluation Board
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535 Kbytes |
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| AN-1696: Application Note 1696 Designing a Boost LED Driver Using the LM5022 |
286 Kbytes |
22-Feb-08 |
Download |
AN-1696 (Chinese): Application Note 1696 Designing a Boost LED Driver Using the LM5022
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410 Kbytes |
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| AN-1605: Application Note 1605 LM5022 Boost LED Driver Evaluation Board |
769 Kbytes |
2-Oct-07 |
Download |
| AN-1557: Application Note 1557 LM5022 Evaluation Board |
513 Kbytes |
22-May-08 |
Download |
AN-1557 (Chinese): Application Note 1557 LM5022 Evaluation Board
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497 Kbytes |
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[Information as of 3-Jul-2009]
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RoHS Compliance Information
