PQ87550AQ

The PQ87550AQ is a fully integrated USB PD solution. It integrates a Buck-boost converter with 4 integrated power switches and a USB PD controller. The PQ87550AQ operates over 4.5V to 36V wide input voltage and can output 3.3V to 22.5V voltage to support a variety of applications. It also supports up to 3.25A continuous output current under certain input supply range. The PQ87550AQ supports USB PD3.1 with PPS and backward supports DCP schemes for Battery Charging specification (BC1.2), The 3A Divider Mode. It also supports QC2.0/QC3.0, Huawei FCP as well. The PQ87550AQ’s buck-boost converter employs current mode control scheme. The switching frequency could be set at 280kHz/420kHz/560kHz through I2C. The PQ87550AQ also provides optional spread spectrum to optimize EMI performance. The PQ87550AQ supports a flexible power management state machine when the battery voltage is low, or the temperature is high. When two PQ87550AQ are used in dual PD ports, the internal power sharing logic can smartly distribute the total power. The PQ87550AQ offers input over-voltage protection, output over voltage protection, cycle-by-cycle current limit, DP/DM/CCx short to battery protection, output short circuit protection, average output current limit and thermal shutdown protection The PQ87550AQ is available in 22-pin 4mm X 5mm Wettable Flank QFN packages.