LM5045
- Highest Integration Controller for Small Form Factor, High-Density Power Converters
- High-Voltage Start-Up Regulator
- Intelligent Sync Rectifier Start-Up Allows Linear Turnon Into Prebiased Loads
- Synchronous Rectifiers Disabled in UVLO mode and Hiccup Mode
- Two Independent, Programmable Synchronous Rectifier Dead-Time Adjustments
- Four High-Current 2A Bridge Gate Drivers
- Wide-Bandwidth Optocoupler Interface
- Configurable for Either Current Mode or Voltage Mode Control
- Dual-Mode Overcurrent Protection
- Resistor Programmed 2MHz Oscillator
- Programmable Line UVLO and OVP
The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100V. This highly integrated controller-driver provides dual 2A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2MHz capable oscillator with synchronization capability and thermal shutdown.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM5045 Full-Bridge PWM Controller With Integrated MOSFET Drivers datasheet (Rev. I) | PDF | HTML | 2026/5/14 | ||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 使用指南 | AN-2111 LM5045 Evaluation Board (Rev. C) | 2013/5/6 | ||||
| 應用說明 | Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) | 2013/5/6 | ||||
| 應用說明 | AN-2213 LM5045 Based 240W Power Converter Using Full-Wave (Rev. A) | 2013/5/6 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
LM5045EVAL — 用於 LM5045 的評估板
SLUC501 — LM5045 Design Calculator
PMP31092 — 小巧的 140-W 全橋參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |
| WQFN (RSG) | 28 | Ultra Librarian |
訂購與品質
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。