高效率同步开关模式超级电容充电器 High-Efficiency Synchronous Switch-Mode Super Capacitor Charger
The bq24640 device is a highly integrated switched-mode super capacitor charge controller. The device offers a constant-frequency synchronous PWM controller with high accuracy charge current, voltage regulation, and charge status monitoring.
The bq24640 charges a super capacitor in two phases: constant current and constant voltage CC/CV. The device can charge super capacitors from 0 V with current set on the ISET pin. When the super capacitor voltage reaches the programmed target voltage, charge current begins tapering down.
The bq24640 enters a low-current sleep mode <15 µA when the input voltage falls below the output capacitor voltage.
The bq24640 has an input CE pin to enable and disable charge, and the STAT and PG output pins report charge and adapter status. The TS pin on the bq24640 monitors the temperature of the capacitor and suspends charge during hot and cold conditions.
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
BQ24640RVAR TI 德州仪器 | 当前型号 | 当前型号 |
BQ24640RVAT 德州仪器 | 完全替代 | BQ24640RVAR和BQ24640RVAT的区别 |