器件名称: LTC3350
功能描述: 在 4.5V 至 35V 输入电压范围内工作，能够提供超过 10A 的充电 / 备份电流能力。该器件还为 1 至 4 个串联超级电容器组提供平衡和过压保护。LTC3350 的同步降压型控制器驱动 N 沟道 MOSFET，以每节高达 5V 的电压以及恒定电流 / 电压给电容器组充电。
文件大小: 536.26KB 共44页
简 介:Electrical Specifications Subject to Change
Features
High Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors n Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors n14-Bit ADC for Monitoring System Voltages/Currents, Capacitance and ESR n Active Overvoltage Protection Shunts n Internal Active Balancers—No Balance Resistors n V : 4.5V to 35V, V IN CAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A n Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current n Dual Ideal Diode PowerPath Controller n All N-FET Charger Controller and PowerPath Controller n Compact 38-Lead 5mm × 7mm QFN Package
n
LTC3350 High Current Supercapacitor Backup Controller and System Monitor Description
The LTC3350 is a backup power controller that can charge and monitor a series stack of one to four supercapacitors. The LTC3350’s synchronous step-down controller drives Nchannel MOSFETs for constant current/constant voltage charging with programmable input current limit. In addition, the step-down converter can run in reverse as a step-up converter to deliver power from the supercapacitor stack to the backup supply rail. Internal balancers eliminate the need for external balance resistors and each capacitor has a shunt regulator for overvoltage protection. The LTC3350 monitors system voltages, currents, stack capacitance and stack ESR which can all be read over the I2C/SMBus. The dual ideal diode……
