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

TPS61251是TI德州仪器公司的一款转换器（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，本站介绍了TPS61251的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

产品应用

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

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61251	WSON (8)	2.00 mm × 2.00 mm

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