The use of universal battery chargers for lithium-ion (Li-ion) and lithium-polymer (Li-poly) batteries with USB 3.0 power delivery (PD) for on-the-go (OTG) charging is growing in a wide range of applications including drones, smartphones, tablet computers, cordless vacuums, portable medical devices, wireless speakers, and electronic point of sale devices. Across these applications, designers are consistently pushed to reduce charge time and form factor, increase power density, and lower cost.
Buck-boost battery chargers combined with USB PD can enable the development of fast, efficient, universal input charging solutions. But these are not simple devices and designing them to support the USB OTG specification can take a significant amount of time. This adds to cost and can affect design schedules. The design process can be further complicated by the need to adhere to USB fast role swap (FRS) timing and control criteria to ensure that a device that is providing power, can quickly become a power consumer to guarantee an uninterrupted data connection.
For USB PD universal charging applications, designers can address many of these issues by turning to integrated chargers that streamline the design process and support the implementation of full-featured and compact buck-boost charging solutions that deliver high power and fast charging with low parts count and high-power density.
Post time: May-09-2022