The LM5023 is a quasi-resonant pulse width modulated (PWM) controller which contains all of the features needed to implement a highly efficient off-line power supply. The LM5023 uses the transformer auxiliary winding for demagnetization detection to ensure critical conduction mode (CrCM) operation. The LM5023 features a hiccup mode for overcurrent protection with an auto restart to reduce the stress on the power components during an overload. A skip-cycle mode reduces power consumption at light loads for energy conservation applications (ENERGY STAR®, CEPCP, and so forth). The LM5023 also uses the transformer auxiliary winding for output overvoltage protection (OVP); if an OVP fault is detected the LM5023 latches off the controller.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5023 AC-DC Quasi-Resonant Current Mode PWM Controller datasheet (Rev. E) | PDF | HTML | 06 Jan 2016 |
| White paper | Power Electronics in Motor Drives: Where is it? (Rev. A) | 01 Oct 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| EVM User's guide | Using the UCC24630EVM-636 65-W AC-to-DC Adapter (Rev. B) | 12 Dec 2016 | ||
| More literature | Design review of a 2-kW parallelable power supply module | 17 Aug 2016 | ||
| More literature | Design review of a 2-kW parallelable power supply module (PPT) | 17 Aug 2016 | ||
| More literature | Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter | 29 Oct 2013 | ||
| Test report | PMP8655 Test Results | 11 Oct 2013 | ||
| Application note | LM5023-2EVM Notebook Adapter | 12 Feb 2013 | ||
| Product overview | LM5023 Product Bulletin | 08 Feb 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
The Texas Instruments LM5023-2NBEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM5023 AC-DC Quasi-Resonant Current Mode PWM Controller. This is a 65W evaluation modules for off-line notebook adapter applications.
This is a high efficiency 65W AC/DC design using UCC24630 Synchronous Rectification Controller for a Universal input (85Vac to 265Vac) to 19.5V @3.33A output exceeding CoC-5 Tier2 and DOE Level VI performance requirements for external power supplies.
The UCC28740EVM-525 evaluation module is a 10W off-line discontinuous mode (DCM) flyback converter that provides constant-voltage (CV) and constant-current (CC) output regulation. It uses optical coupler feedback for tight voltage regulation and improved the transient response to large load steps (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
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