UCC28711
- < 10-mW No-Load Power
- Primary-Side Regulation (PSR) Eliminates Opto-Coupler
- ±5% Voltage and Current Regulation Across Line and Load
- 700-V Start-Up Switch
- 100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
- Resonant Valley-Switching Operation for Highest Overall Efficiency
- Frequency Jitter to Ease EMI Compliance
- Wide VDD Range Allows Small Bias Capacitor
- Clamped Gate-Drive Output for MOSFET
- Overvoltage, Low-Line, and Overcurrent Protection Functions
- Programmable Cable Compensation (UCC28710)
- NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options
- SOIC-7 Package
- Create a Custom Design Using the UCC28710 With the WEBENCH® Power Designer
The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.
An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.
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 | UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. C) | PDF | HTML | 2017/6/30 | ||
| 選擇指南 | Current Sense Amplifiers (Rev. E) | 2021/9/20 | ||||
| 應用說明 | Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips | PDF | HTML | 2021/8/31 | |||
| 應用說明 | Minimize Standby Consumption for UCC287XX Family | 2019/8/1 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | Troubleshooting TI PSR controllers | 2016/10/3 | ||||
| 白皮書 | Control Challenges for Low Power AC/DC Converters | 2015/10/2 | ||||
| 白皮書 | Control Challenges for Low Power AC/DC Converters (PPT) | 2015/10/2 | ||||
| 更多文件說明 | Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter | 2013/10/29 |
設計與開發
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UCC28711EVM-160 — UCC28711 評估模組
UCC28740EVM-525 — UCC28740EVM-525 評估模組
UCC28740EVM-525 評估模組是一款 10W 離線不連續模式 (DCM) 返馳式轉換器，可提供定電壓 (CV) 和定電流 (CC) 輸出穩壓。其採用光學耦合器回饋以進行嚴格的電壓調節，改善對大負載步進的暫態響應能力與一次側控制技術，實現精確的定電流調節。UCC28740 在控制演算法中，運用頻率調變、一次側峰值電流調變、波谷切換及波谷略過，使整個操作範圍的效率達到最大值。
SLUC590 — UCC2871x Calculator
PMP21927 — 15-W 多輸出離線返馳參考設計
TIDA-00173 — 適用於馬達驅動器的 400V 至 690V AC 輸入、50W 返馳隔離式電源參考設計
此參考設計提供隔離式 +24V (45W)、±16V (4.5W) 和 +6V (0.5W) 輸出，為變速驅動器中的控制電子設備供電。 電源可以直接由 3 相 AC 電源（380Vac 至 690Vac）供電，也可以由 DC 鏈電壓（400Vdc 至 1,200Vdc）供電。 此設計使用準諧振返馳拓撲，額定總輸出功率為 50 瓦特。 使用一次側穩壓，電源供應器的線路和負載穩壓設計為在 5% 以內（消除昂貴的回饋元件）。電源供應器的設計可滿足 IEC61800-5 要求的電氣間隙、爬電距離和隔離測試電壓。
TIDA-00315 — 適用於伺服驅動器的 100/200Vac 輸入、30W 隔離電源供應參考設計
此參考設計提供隔離式 24Vdc、16Vdc (x3) 及 6V 輸出，可為 100Vac/200Vac 輸入伺服驅動的控制電子裝置、IGBT 模組和風扇供電。電源可直接由單相或 3 相位 AC 主要裝置供電，或可由 DC 鏈路電壓供電。此參考設計採用一次側調節、準諧振返馳拓撲，額定輸出 30W。電源供應器的線路和負載穩壓設計為在 5% 以內。電源供應器的設計可滿足 IEC61800-5 要求的電氣間隙、爬電距離和隔離測試電壓
TIDA-00440 — 用於判斷絕緣電阻的漏電流量測參考設計
此參考設計可測量高達 100MΩ 的絕緣電阻。它具有板載隔離式 500Vdc 電源供應器和隔離式訊號調整電路，可測量漏電流。這種設計可用於尋找變壓器和馬達繞組中因絕緣擊穿而引起的洩漏。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 7 | 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。