The LM34927 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The Constant on-time (COT) control scheme employed in the LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.
| Documentación principal | Tipo | Título | Opciones de formato | Fecha |
|---|---|---|---|---|
| * | Data sheet | LM34927 Integrated Secondary-Side Bias Regulator for Isolated DC-DC Converters datasheet (Rev. H) | PDF | HTML | 27 nov 2017 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 jun 2018 | ||
| Analog Design Journal | Fly-Buck(TM) converter provides EMC and isolation in PLC applications | 29 ene 2015 | ||
| Application note | AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) | 17 dic 2014 | ||
| Application note | AN-2202 LM34927 Integrated Bias Regulator for Isolated DC Convtr (Rev. A) | 23 abr 2013 |
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The LM34927 regulator features all of the functions needed to implement a low cost, efficient, isolated bias regulator. This high voltage regulator contains two 100V N-Channel MOSFET switches - a high-side buck switch and a low-side synchronous switch. The Constant-on-time (COT) control scheme (...)
This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
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