NU2121是一款独立的双向开关电容变换器,集成了功率开关,正向输出电流10A(2:1转换),反向输出电流5A(1:2转换)。该架构和集成的FET经过优化,可在固定频率模式下实现50%的占空比。在0A负载切换模式下,NU2121的典型静态电流为50uA,在低功耗模式下为14uA。优化后的箕斗控制方案大大提高了轻载的效率。它的高开关频率高达1MHz,减小了电容器的尺寸,并进一步减少了电路的面积。
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• Support 2:1 and 1:2 switched capacitor DC/DC converter for 2S battery in series
• Excellent light-load mode efficiency performance
- 2:1 DCDC- Up to 99% efficiency at 1A/4.0V
- 2:1 DCDC- Up to 99% efficiency at 0.1A/4.0V
- 1:2 DC/DC Up to 98.8% efficiency at 2A/4.0V
• Ultra-low 50uA quiescent current with open load
• Integrated driver ACDRV of the external BackBack high-side switch
• Audio mode to eliminate audible noise issue, selective switching frequency: 30KHz and 25KHz
• Dithering switching frequency to optimize the EMI emission
• Dead battery activation power path
• Power good indicator output
• Integrated Programmable Protection Features for Safe Operation
- Input Under-Voltage Protection (VIN_UVP)
- Input Over-Voltage Protection (VIN_OVP)
- Output Over-Voltage Protection (VOUT_OVP)
- Two-level forward direction Output OverCurrent Protection IOCP and VOCP
- Reverse direction Input Over-Current Protection
- VAC Over-Voltage Protection (VAC_OVP)
- Two-level thermal alarms and 150°C thermal protection with hiccup mode
• Programmable Settings for System Optimization - STAT, FLAG, and MASK options for Interrupts
• I2C compatible interface supporting 1.2V/1.8V/3.3V supply