TPS65279
- 4.5-V to 18-V Wide Input Voltage Range
- Programmable Slew Rate Control for Output
Voltage Transition - Up to 5-A Maximum Continuous Output Current in
Buck 1 and Buck 2 - Buck 1 and Buck 2 can be Paralleled to Deliver up
to 10-A Current - Pulse Skipping Mode to Achieve High Efficiency in
Light Load - Adjustable Switching Frequency
200 kHz to 1.6 MHz Set by External Resistor - Dedicated Enable and Soft-Start for Each Buck
- Peak Current-Mode Control With Simple
Compensation Circuit - Cycle-by-Cycle Overcurrent Protection
- 180° Out-of-Phase Operation to Reduce Input
Capacitance and Power Supply Induced Noise - Over Temperature Protection
- Available in 32-Pin Thermally Enhanced HTSSOP
(DAP) and 36-Pin VQFN 6-mm × 6-mm (RHH)
Packages
TPS65279 is a monolithic dual synchronous buck converter with wide 4.5-V to 18-V operating input voltage range that encompassed most intermediate bus voltage operating off 5-, 9-, 12- or 15-V power bus or battery. The converter with constant frequency peak current mode control is designed to simplify its application while giving the designers options to optimize their usage according to the target applications.
Two bucks in TPS65279 can be paralleled to delivery up to 10-A load current by using current sharing mode, connect ISHARE pin high. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise.
TPS65279 features a dedicated enable pin. An independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions.
Low-side reverse overcurrent protection also prevents excessive sinking current from damaging the converter. TPS65279 also features a light load pulse skipping mode (PSM) controlled by MODE pin configuration.
The TPS65279 is available in a 32-pin thermally-enhanced HTSSOP (DAP) package and 36-pin 6-mm × 6-mm VQFN (RHH) package.
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 | TPS65279 4.5- to 18-V Input, 5-A/5-A Dual Synchronous Step-Down Converter With Current Sharing datasheet (Rev. C) | PDF | HTML | 2015/5/14 | ||
| 應用說明 | Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) | PDF | HTML | 2019/4/1 | |||
| 使用指南 | 4.5V TO 18V Input, 6A/3.5A Dual Synchronous Step-Down Converter, TPS65279RHHR | 2013/8/21 | ||||
| 使用指南 | 4.5V TO 18V Input, 5A/5A Dual Synchronous Step-Down Converter, TPS65279DAPR | 2013/8/21 |
設計與開發
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TPS65279EVM — TPS65279EVM 評估模組
德州儀器 TPS65279EVM 評估模組 (EVM) 是一個已完成組裝並經過測試的電路，用於評估 TPS65279 降壓轉換器。TPS65279 是一款單晶片雙同步降壓轉換器，具備 4.5V 至 18V 的寬廣運作輸入電壓範圍，涵蓋大多數從 5V、9V、12V 或 15V 電源匯流排或電池運作的中間匯流排電壓。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHH) | 36 | Ultra Librarian |
| HTSSOP (DAP) | 32 | 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。