UCC28250
- Prebiased Start-up
- Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
- Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
- Primary or Secondary-Side Control
- 3.3-V, 1.5% Accurate Reference Output
- 1-MHz Capable Switching Frequency
- 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
- Programmable Soft-Start and Hiccup Restart Timer
- Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package
The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.
Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.
The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | UCC28250 Advanced PWM Controller With Prebias Operation datasheet (Rev. D) | PDF | HTML | 2015年 6月 28日 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Application note | Differences Between the UCC28251 and UCC28250 and Evaluation of the UCC28251 in (Rev. A) | 2013年 2月 15日 | ||
| EVM User's guide | Using the UCC28250EVM-564 (Rev. A) | 2011年 10月 7日 | ||
| EVM User's guide | Using the UCC28250EVM-501 Half Bridge DC-DC Converter with Primary Side Control (Rev. B) | 2010年 12月 7日 | ||
| Application note | Designing UCC28250 as a Secondary Side Control with a Pre-Bias Condition | 2010年 11月 24日 |
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)。
UCC28250EVM-501 — 用於一次側控制中的 UCC28250 進階 PWM 控制器的評估模組
UCC28250EVM-564 — 用於在二次側控制中具有預偏壓負載操作的 UCC28250 進階 PWM 控制器的評估模組
PMP8878 — 1/8 磚型隔離式 DC/DC 電信電源模組參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
| VQFN (RGP) | 20 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點