TPS61251是TI公司的一款转换器（集成开关）产品，TPS61251是用于电池备份充电的 3.5MHz、1.5A 电流限制、92% 高效升压转换器，本页介绍了TPS61251的产品说明、应用、特性等，并给出了与TPS61251相关的TI元器件型号供参考。
TPS61251 - 用于电池备份充电的 3.5MHz、1.5A 电流限制、92% 高效升压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - TI公司（Texas Instruments，德州仪器）
- Resistor Programmable Input Current Limit
- ±10% Current Accuracy at 500 mA over Full Temperature Range
- Programmable from 100 mA up to 1500 mA
- Snooze Mode Draws Only 2 μA (Typical) Quiescent Current
- Designed to Charge Large Capacitor Values in the Farad Range
- Up to 92% Efficiency
- Power Good Indicates Appropriate Output Voltage Level even in Shut Down
- VIN Range from 2.3 V to 6 V
- Adjustable Output Voltage up to 6.5 V
- 100% Duty-Cycle Mode When VIN > VOUT
- Load Disconnect and Reverse Current Protection
- Short-Circuit Protection
- Typical Operating Frequency 3.5 MHz
- Available in a 2 × 2-mm WSON-8 Package
- Current Limited Applications With High Peak Power Loads (SSD, PCMCIA Tx Bursts, Memory, GPRS/GSM Tx)
- Li-Ion Applications
- Battery Backup Applications
- Audio Applications
- RF-PA Buffer
The TPS61251 device provides a power supply solution for products powered by either a three-cell, NiCd or NiMH battery, or a one-cell Li-Ion or Li-polymer battery. The wide input voltage range is ideal to power portable applications like mobile phones, solid state drives (SSD) and wireless modems. The converter is designed to charge large capacitors in the Farad range to support battery back up applications. During capacitor charging, the TPS61251 device is working as a constant current source until VOUT has reached its programmed value. The charge current can be programmed by an external resistor RILIM and provides a ±10% accuracy for the average input current limit.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS61251 | WSON (8) | 2.00 mm × 2.00 mm |
