New Industry Products

High-Side Switches for USB Ports for Power Delivery and Fast Role Swap

October 02, 2018 by Paul Shepard

Diodes Incorporated today announced the introduction of the AP22815 and AP22615 3A single-channel high-side power switches for USB ports and other hot-swap applications. These devices are designed to provide protection for any sensitive electronic equipment that is used in a hot-swap situation, such as USB peripherals or external storage devices.

The highly-integrated high-side switches provide extensive port protection with auto-recovery, including over-voltage, over-current, short-circuit, and over-temperature. In addition, they feature controlled rise-time and under-voltage lock-out, as well as a discharge function for external storage capacitors.

Based on an N-channel MOSFET and Diodes Incorporated’s patented copper-pillar packaging technology to achieve an exceptionally low on-resistance, the power switches feature a wide input voltage range of 3.0V to 5.0V and an adjustable limited load current of up to 4.0A (AP22615 only).

With a low RDS(ON) of just 40mΩ and high ESD protection (2kV human body model, 200V machine model), the AP22815/615 are integrated load switches that are well-suited for a range of applications, including notebooks, netbooks, tablets, set-top boxes, USB chargers, and other consumer electronics.

As well as having integrated load-current limiting, which is adjustable in the AP22615, the high-side power switches are fully compliant with the USB power delivery and fast-role swap specifications. This ensures that the internal power transistor will detect and react to the presence or absence of a power rail within 150µs, thereby supporting the hot-swapping of USB power sinks and sources without resulting in any disruption to the consumer experience.

Both devices feature an enable (which can be specified to be active-high or active-low) and a dedicated flag output that signals a fault condition. To accommodate devices with high load capacitance, a 7ms deglitch period is built in to the devices, to avoid false triggers.

The AP22815 with fixed current limiting is available in the TSOT25 package, priced at $0.40 in lots of 1k pieces.  The AP22615 with adjustable current limiting is available in the TSOT26 package, priced at $0.45 in lots of 1k pieces.