USB Power Switches

USB power switches are power management devices used to charge electronic devices on USB ports and hubs on computers, docking stations, handheld devices and automotive devices. 


How do USB power switches work?

They work by monitoring the current on a device and latch a switch off if the output current is shorted. They often have an auto reset feature which reactivates the switch once the short circuit is removed. They work in the same way as hot swap controllers, which allow circuit boards and electronic cards to be inserted into equipment, removing the need to power down during use.


Features of USB power switches

Most USB power switches have multiple safety features. For instance, built in thermal-overload protection limits junction temperature and dissipation of power. 


The internal circuity is limited to an accurate figure to protect the input supply against short circuit conditions as well as overload. They're also fitted with fault signals that notify the microprocessor whenever there's a current-limit, under voltage lockout (UVLO), short-circuit fault or thermal overload.


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Description Price Switch Type Number of Outputs Switch On Resistance Maximum Power Dissipation Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature Automotive Standard
RS Stock No. 171-2070
Mfr. Part No.BD6517F-E2
BrandROHM
$1.481
Each (On a Reel of 2500)
units
High Side 2 180Ω 670 mW SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 171-2104
Mfr. Part No.BD6516F-E2
BrandROHM
$1.864
Each (In a Pack of 5)
units
High Side 2 180Ω 670 mW SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 171-2069
Mfr. Part No.BD6516F-E2
BrandROHM
$1.168
Each (On a Reel of 2500)
units
High Side 2 180Ω 670 mW SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 169-0426
Mfr. Part No.BD6510F-E2
BrandROHM
$1.925
Each (On a Reel of 2500)
units
USB High Side Power 4 100mΩ 560 mW SOP 8 2A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm - - -
RS Stock No. 171-2109
Mfr. Part No.BD6517F-E2
BrandROHM
$2.364
Each (In a Pack of 5)
units
High Side 2 180Ω 670 mW SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 128-8866
Mfr. Part No.BD11600NUX-E2
BrandROHM
$1.085
Each (In a Pack of 10)
units
USB 1 1.92 W VSON 10 40µA 3 x 2 x 0.58mm 3mm 2mm 0.58mm 5.5 V +85 °C -
RS Stock No. 700-0735
Mfr. Part No.BD6510F-E2
BrandROHM
$3.895
Each (In a Pack of 2)
units
USB High Side Power 4 100mΩ 560 mW SOP 8 2A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm - - -