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 Mounting Type Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature
RS庫存編號 739-5144
製造零件編號FSUSB42MUX
HK$13.12
單位
- 2 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C
RS庫存編號 864-4743
製造零件編號FSUSB42MUX
HK$2.088
個 (在毎卷:4000)
單位
- 1 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C
全新
RS庫存編號 178-4635
製造零件編號FSUSB242UCX
HK$4.671
/個 (每包:10個)
單位
USB 2 - Surface Mount WLCSP 9 - 1.26 x 1.26 x 0.31mm 1.26mm 1.26mm 0.31mm 5.5 V +85 °C
RS庫存編號 670-9999
製造零件編號FSUSB30MUX
HK$6.598
/個 (每包:5個)
單位
- 1 10Ω - Surface Mount MSOP 10 - 3 x 3 x 1.1mm 3mm 3mm 1.1mm - +85 °C
RS庫存編號 169-8565
製造零件編號FSUSB45UMX
HK$4.667
個 (在毎卷:5000)
單位
- - 0.65Ω - Surface Mount UMLP 10 - 1.8 x 1.4 x 0.5mm 1.8mm 1.4mm 0.5mm 4.3 V +85 °C
RS庫存編號 864-4712
製造零件編號FSUSB63UMX
HK$3.896
個 (在毎卷:5000)
單位
Multiplexer - - - Surface Mount UMLP 12 - 1.8 x 1.8 x 0.5mm 1.8mm 1.8mm 0.5mm - +85 °C
RS庫存編號 809-4996
製造零件編號FAN3989MLP8X
HK$7.722
Each (On a Tape of 5)
單位
- 1 - - Surface Mount MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C
全新
RS庫存編號 178-4474
製造零件編號FUSB307BMPX
HK$11.648
/個 (每包:10個)
單位
USB 1 - - Surface Mount WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +85 °C
RS庫存編號 807-6005
製造零件編號FSA880UMX
HK$5.192
/個 (每包:10個)
單位
High Side - - - Surface Mount UMLP 16 - 1.8 x 2.6 x 0.5mm 1.8mm 2.6mm 0.5mm 4.4 V +85 °C
RS庫存編號 135-8667
製造零件編號FUSB252UMX
HK$5.692
個 (在毎卷:5000)
單位
High Speed Digital 2 480mΩ - Surface Mount UMLP 16 1A 1.8 x 2.6 x 0.5mm 1.8mm 2.6mm 0.5mm 5.5 V +85 °C
RS庫存編號 862-8906
製造零件編號FSA832L10X
HK$4.503
/個 (每包:25個)
單位
Isolation 1 - Surface Mount MicroPak 10 - 2.1 x 1.6 x 0.5mm 2.1mm 1.6mm 0.5mm 6 V +85 °C
全新
RS庫存編號 178-4411
製造零件編號FUSB302BVMPX
HK$15.582
/個 (每包:10個)
單位
USB 1 - - Surface Mount WQFN 14 - 2.5 x 2.5 x 0.72mm 2.5mm 2.5mm 0.72mm 21 V +105 °C
RS庫存編號 163-0710
製造零件編號NCP383LMUAJAATXG
HK$4.682
個 (在毎卷:3000)
單位
High Side 2 95Ω 850 mW Surface Mount UDFN 10 3.01A 3 x 3 x 0.5mm 3mm 3mm 0.5mm 5.5 V +85 °C
全新
RS庫存編號 178-4452
製造零件編號FUSB303TMX
HK$3.394
/個 (每包:50個)
單位
USB 1 - - Surface Mount QFN 12 - 1.65 x 1.65 x 0.35mm 1.65mm 1.65mm 0.35mm 22 V +85 °C
RS庫存編號 166-2527
製造零件編號FSUSB30MUX
HK$3.275
個 (在毎卷:4000)
單位
- 1 10Ω - Surface Mount MSOP 10 - 3 x 3 x 1.1mm 3mm 3mm 1.1mm - +85 °C
全新
RS庫存編號 178-4289
製造零件編號FUSB307BMPX
HK$6.213
個 (在毎卷:3000)
單位
USB 1 - - Surface Mount WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +85 °C
全新
RS庫存編號 178-4282
製造零件編號FSUSB242UCX
HK$2.177
個 (在毎卷:3000)
單位
USB 2 - Surface Mount WLCSP 9 - 1.26 x 1.26 x 0.31mm 1.26mm 1.26mm 0.31mm 5.5 V +85 °C
全新
RS庫存編號 186-1262
製造零件編號FUSB307BVMPX
HK$7.894
個 (在毎卷:3000)
單位
USB - - - Surface Mount WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +105 °C
RS庫存編號 166-2142
製造零件編號FSA9280AUMX
HK$8.169
個 (在毎卷:5000)
單位
USB Accessory Detection Switch 1 10Ω - Surface Mount UMLP 20 - 3 x 4 x 0.5mm 3mm 4mm 0.5mm 4.4 V +85 °C
全新
RS庫存編號 178-4284
製造零件編號FUSB302BVMPX
HK$8.307
個 (在毎卷:3000)
單位
USB 1 - - Surface Mount WQFN 14 - 2.5 x 2.5 x 0.72mm 2.5mm 2.5mm 0.72mm 21 V +105 °C