A Very High Efficiency Switched Capacitor 8A Charger with Bypass Mode
The SM5452 is a highly integrated dual-mode switched capacitor charger that integrates an external OVP switch controller, an infinite regulation loop and a very accurate 12-Bit ADC. The device features not only a switched-capacitor architecture for a current doubler mode but also a path-through topology for a bypass mode. This very high efficiency switched capacitor charger with a very low R DS_ON resistance reduces the thermal dissipation of a fast-charging system, which results in shorter charging time. The device integrates a stand-alone infinite regulation loop for VBAT and IBAT using an internal Q RB switch without an external OVP switch.
The device also includes an accurate 12-bit ADC to provide the input voltage, input current, output voltage, output current and die temperature needed to manage the charging profile of fast charging system.
The device integrated very powerful protection schemes such as over-voltage, over-current, under-current, over-temperature, a flying capacitor short-circuit and a watchdog timer to secure a robust charging for the system.
The SM5452 is available in 56-bumps WLCSP package.
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