LS0502SCD33 Series – Supercapacitor Protection IC
The LS0502SCD33 is a complete solution for a system with a backup storage capacitor or capacitor bank. It integrated input overvoltage, an overcurrent protection circuit, a reverse blocking switch, and a supercapacitor charging control circuit. It also has built-in cell balance to protect two-cell supercapacitor systems. When the main supply is present and above the minimum system supply voltage, the system will draw power from the input supply. At the same time, the integrated linear charger charges the storage element at up to 300 mA current. Once the storage element is charged, the circuit draws only 2.5 μA of current while it maintains the supercapacitor or other storage element in its ready state. When the main supply is removed, the integrated reverse blocking switch will block the current flow from the system rail to the input. The linear charger will be turned on to provide power to the system rail with a low resistance path with up to 2 A current. An integrated cell balancing circuit will keep monitoring the cell voltage when charging and keep the two cells voltage at the same level. The LS0502SCD33 is externally programmable for input current limit, input overvoltage, charge current limit, and charge voltage limit. It provides a flag signal when the input supply is unplugged so that the main system can take action. LS0502SCD33 is available in DFN3X3-10 package.
Features & Benefits
- 2.5 V to 5.5 V System Voltage
- 18 V Input Rating with Overvoltage Protection
- Programmable 1.1 V to 5.3 V Cap Voltage Range
- Programmable Supercapacitor Charge Current
- Programmable Input Overcurrent Protection
- Automatic Cell Balancing
- Automatic Main/Backup Switchover
- Up to 2 A Discharge Current
- Programmable Voltage and Current Thresholds
- ±2 % Threshold Accuracy
- 2.5 µA Ready Quiescent Current
- Small Solution Size
- DFN Package
Applications
- Handheld Industrial Equipment
- Dash Camera
- IoT
- SmartMeter
- Portable Device with Removable Battery
