LM5020
- Internal Start-up Bias Regulator
- Error Amplifier
- Precision Voltage Reference
- Programmable Softstart
- 1A Peak Gate Driver
- Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
- Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
- Cycle-by-Cycle Over-Current Protection
- Slope Compensation (LM5020-1)
- Programmable Oscillator Frequency with Synchronization Capability
- Current Sense Leading Edge Blanking
- Thermal Shutdown Protection
The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.
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 | LM5020 100V Current Mode PWM Controller datasheet (Rev. F) | 2006/4/14 | |||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 技術文章 | Flyback converters: two outputs are better than one | PDF | HTML | 2016/11/24 | |||
| 技術文章 | What is behind isolated DC/DC converter voltage regulation? | PDF | HTML | 2015/8/31 | |||
| 使用指南 | Dual Output Isolated Flyback Design:User Guide | 2012/1/27 | ||||
| 應用說明 | An Alternative Approach to Higher-Power Boost Converters | 2009/11/30 | ||||
| 白皮書 | PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design | 2005/10/1 |
設計與開發
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LM5020EVAL — 100V 電流模式 PWM 控制器返馳評估板
100V Current Mode PWM Controller Flyback Evaluation Board
PSEMTHR24EVM-081 — 適用於 24 埠 IEEE 802.3bt 就緒 PSE 系統的主機板
PSEMTHR24EVM-081 是 TPS23881 和 TPS23882 PSE 控制器的基板。此電路板包含 24 組 2 對 / 4 對埠，可用於為 IEEE 802.3at 應用傳送高達 30W/埠的功率，以及為 IEEE 802.3bt 應用傳送高達 90W/埠的功率。
FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator
此工具協助電源供應工程師根據規格選擇正確的隔離式 DC-DC 拓撲結構。根據選擇的拓撲結構，計算機還會推薦適合設計的 IC。
許多 TI 參考設計包含 LM5020
使用我們的參考設計選擇工具，以檢視並找出最適合您的應用和參數的設計。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
| WSON (DPR) | 10 | 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。