Texas Instruments TPS65283 同步双路降压转换器
德州仪器 TPS65283 同步双路降压转换器采用了散热增强的 4mm × 4mm VQFN 封装,是全功能 4.5 到 18V Vin、3.5A/2.5A 输出电流同步降压直流-直流转换器,具有高效率并集成高侧和低侧 MOSFET ,因而适用于小型设计。这些器件还集成了一个 N 沟道 MOSFET 电源开关,用于配电系统。它们提供了一个整体式配电解决方案,其中需要精密的电流限制和快速的保护响应。此 60mΩ 独立配电开关使用一个外部电阻器,可将输出电流限制在典型值为 100mA 至约 2.7A 的可编程电流限值阈值范围内。在电流典型值为 1.25A 时,可获得 ±10% 的电流限制精度nFAULT 输出在过流和反向电压条件下被置为低电平。特性
- Buck Converter
- Wide Input Voltage Range 4.5 to 18V
- Integrated Dual Buck Converter, Maximum Continuous Current 3.5A (Buck1) / 2.5A (Buck2)
- Feedback Reference Voltage 0.6V ±1%
- Adjustable Switching Frequency 200kHz to 2MHz
- Internal Built Soft-Start Time 2.4ms
- External Clock Synchronization
- Cycle-by-Cycle Current Limit
- Power Good Indicator for Each Buck
- Continuous Current Mode (TPS65283) or Pulse Skipping Mode (PSM) (TPS65283-1) at Light Load
- Power Distribution Switch
- Integrated a Power Distribution Switch
- With On-Resistance 60mΩ
- Operating Input Voltage Range 2.4 to 6V
- Adjustable Current Limiting from 100mA to 2.7A
- Current-Limit Accuracy ±10% at 1.25A (Typical)
- Auto Recovery Overcurrent Protection
- Reverse t to Output Voltage Protection
- Overtemperature Protection
- 24-Lead VQFN (RGE) 4mm×4mm Package
应用
- USB Ports and Hubs
- Set-Top Box
- Digital TV
- DSL/Cable Modem, Wireless Router
- Home Gateway and Access Point Networks
- Car Infotainment
Typical Schematic
发布日期: 2014-10-15
| 更新日期: 2022-03-11
