PSC2725 Datasheet | Prisemi

Description PSC2725 bines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charge time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution. The device supports 3.5-6.0V input voltage sources, including standard USB host port and USB charging port with 6.1V over-voltage protection. The device also supports USB On-the-Go operation by providing on the VBUS with an accurate current limit. The power path management regulates the system slightly above battery voltage but does not drop below 3.5-V minimum system voltage (programmable). With this feature , the system keeps operating even when the battery is pletely depleted or removed. When the input source current or voltage limit is reached, the power path management automatically reduces the charge current to zero and then starts discharges the battery until the system power requirement is met. This supplement mode operation keeps the input source from getting overloaded. The device initiates and pletes a charging cycle when host control is not available. It automatically charges the battery in three phases: pre-conditioning, constant current, and constant voltage. In the end, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. Later on, when the battery voltage falls below the recharge threshold, the charger automatically starts another charging cycle. The charge device provides various safety features for battery charging and system operation, including charging safety timer, and over-voltage/over-current protections. The STAT output reports the charging status and also can be used to notify the host when a fault occurs. The...