The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5021 AC-DC Current-Mode PWM Controller datasheet (Rev. E) | PDF | HTML | 24 Dec 2014 |
| Functional safety information | LM5021 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 12 Sep 2022 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Technical article | Power Tips: Design considerations of high-voltage converters in a cascode MOSFET | PDF | HTML | 03 Nov 2015 | |
| Application note | AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) | 01 May 2013 | ||
| User guide | Load Detecting Power Supply User Guide | 27 Jan 2012 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (P) | 8 | Ultra Librarian |
| VSSOP (DGK) | 8 | Ultra Librarian |
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