The LM34925 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 LM34925 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 under voltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34925 device is offered in 8-pin WSON and
8-pin SO PowerPAD plastic packages.
| 重要文件 | 類型 | 標題 | 格式選項 | 日期 |
|---|---|---|---|---|
| * | Data sheet | LM34925 Integrated Secondary-Side Bias Regulator for Isolated DC-DC Converters datasheet (Rev. G) | PDF | HTML | 2017年 11月 20日 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Analog Design Journal | Fly-Buck(TM) converter provides EMC and isolation in PLC applications | 2015年 1月 29日 | ||
| Application note | AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) | 2014年 12月 17日 | ||
| EVM User's guide | AN-2204 LM5017 Isolated Supply Evaluation Board (Rev. B) | 2013年 8月 13日 | ||
| EVM User's guide | LM34925 Isolated Evaluation Board (Rev. A) | 2013年 4月 23日 |
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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.
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。