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XRP2528EVB Datasheet(PDF) 10 Page - Exar Corporation |
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XRP2528EVB Datasheet(HTML) 10 Page - Exar Corporation |
10 / 13 page X XR RP P2 25 52 27 7 -- X XR RP P2 25 52 28 8 S Siin ng glle e/ /D Du ua all C Ch ha an nn ne ell A Ad djju us stta ab blle e C Cu urrrre en ntt P Po ow we err D Diis sttrriib bu uttiio on n S Sw wiittcch h © 2011 Exar Corporation 10/13 Rev. 1.1.0 typ. A 108.7 kohm Please note that the allowed values for RSET resistor are 100kohm < RSET < 330kohm. UNDER-VOLTAGE LOCKOUT Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply has reached at least 1.68V, even if the switch is enabled. Upon detection of an input voltage below approximately 1.68V, the power switch is turned off while a fault condition is reported by the error flag signal. THERMAL PROTECTION Internal thermal sensing circuitry monitors the operating temperature of the device for each channel independently. Upon detection of a temperature in excess of 135°C, the power switch for the given channel is disabled preventing any damages to the device while a fault condition is reported by the error flag signal. A built-in 10°C hysteresis allows the device to cool down to 125°C before resuming normal operations on the faulty channel at which point the error flag signal is cleared. TEST CIRCUIT |
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