LM5046
- Highest Integration Controller for Small
Form Factor, High-Density Power Converters - High-Voltage Start-Up Regulator
- Intelligent Sync Rectifier Start-Up Allows
Linear Turn-on into Prebiased Loads - Synchronous Rectifiers Disabled in UVLO Mode
and Hiccup Mode - Two Independent, Programmable Dead-Time
Adjustments to Enable Zero-Volt Switching - Four High-Current 2-A Bridge Gate Drivers
- Wide-Bandwidth Opto-Coupler Interface
- Configurable for Either Current Mode or Voltage
Mode Control - Dual-Mode Overcurrent Protection
- Resistor Programmed 2-MHz Oscillator
- Programmable Line UVLO and OVP
The LM5046 PWM controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter 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 100 V. This highly integrated controller-driver provides dual 2-A high- 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 dead-time to enable zero-volt switching of the primary FETs. Intelligent startup 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 2-MHz 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 | LM5046 Phase-Shifted Full-Bridge PWM Controller With Integrated MOSFET Drivers datasheet (Rev. H) | PDF | HTML | 2013/5/3 | ||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | AN-2116 SolarMagic ICs in Micro-inverter Applications (Rev. B) | 2013/5/6 | ||||
| 應用說明 | AN-2126 LM5046 Based Eighth Brick Reference Design (Rev. B) | 2013/5/6 | ||||
| 應用說明 | Using a Phase-Shifted Full-Bridge Topology in Small Form Factor Power Converters | 2011/8/31 |
設計與開發
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LM5046EVAL — 用於 LM5046 的評估板
LM5046 評估模組旨在為設計工程師提供基於相移全橋拓撲結構的全功能電源轉換器，以評估 LM5046 PWM 控制器。評估電路板採用業界標準的四分之一磚封裝。
SLUC500 — LM5046 Design Calculator
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RSG) | 28 | Ultra Librarian |
| HTSSOP (PWP) | 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。