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PDF US3377 Datasheet ( Hoja de datos )

Número de pieza US3377
Descripción POWER DISTRIBUTION SWITCH
Fabricantes Unisonic Technologies 
Logotipo Unisonic Technologies Logotipo
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US3377 datasheet

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US3377 pdf
US3X77
CMOS IC
FUNCTIONAL DESCRIPTION
OVERCURRENT PROTECTION
When the output load exceeds the current-limit threshold, The Over Current Protection will be triggered. The
typical current limit value of UTC US3077/US3277/US3377/US3477/US3577 is 1A, 1.5A, 2A, 2.5A. There is foldback
of current limit when short-circuit being encountered.
OC RESPONSE
The OC open-drain output is asserted (active low) when an over current or over-temperature shutdown condition
is encountered after a 9-ms deglitch timeout. The output remains asserted until the over-current or over-temperature
condition is removed.
THERMAL SHUTDOWN
Thermal shutdown protects UTC US3X77 from excessive power dissipation. If the die temperature exceeds 135°C,
the MOSFET switch is shut off. 20°C of hysteresis prevents the switch from turning on until the die temperature
drops to 115°C. Thermal shutdown circuit functions only when the switch is enabled.
UNDERVOLTAGE LOCKOUT (UVLO)
UVLO (under-voltage lockout) prevents the output MOSFET from turning on until IN (input voltage) exceeds 2.5V
typically. After the switch turns on, if the voltage drops below 2.3V typically, UVLO shuts off the output MOSFET.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-568.C

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