Datasheet SiC476, SiC477, SiC478, SiC479 (Vishay) - 4

SiC476, SiC477, SiC478, SiC479
www.vishay.com Vishay Siliconix
RECOMMENDED OPERATING CONDITIONS
(all voltages referenced to GND = 0 V)
PARAMETER MIN. TYP. MAX. UNIT
Input voltage (VIN) 4.5 - 55 Control input voltage (VCIN) (1) 4.5 - 55 Enable (EN) 0 - 55 V Bias supply (VDD) 4.75 5 5.25 Drive supply voltage (VDRV) 4.75 5.3 5.55 Output voltage (VOUT) 0.8 - 24
Temperature
Recommended ambient temperature -40 to +105 °C Operating junction temperature -40 to +125
Note
(1) For input voltages below 5 V, provide a separate supply to VCIN of at least 5 V to prevent the internal VDD rail UVLO from triggering
ELECTRICAL SPECIFICATIONS
(VIN = VCIN = 48 V, TJ = -40 °C to +125 °C, unless otherwise stated)
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Power Supplies
VIN = VCIN = 6 V to 55 V, 4.7 5 5.3 VEN = 5 V, not switching VDD supply VDD V VIN = VCIN = 5 V, 4.7 5 - VEN = 5 V, not switching VDD dropout VDD_DROPOUT VIN = VCIN = 5 V, IVDD = 1 mA - 150 - mV VDD UVLO threshold, rising VDD_UVLO 3.75 4 4.25 V VDD UVLO hysteresis VDD_UVLO_HYST - 150 - mV Input current IVCIN Non-switching, VFB > 0.8 V - 156 200 μA Shutdown current IVCIN_SHDN VEN = 0 V - 4 8
Controller and Timing
TJ = 25 °C 796 800 804 Feedback voltage VFB m/V TJ = -40 °C to +125 °C (1) 792 800 808 VFB input bias current IFB - 2 - nA Minimum on-time tON_MIN. - 45 100 ns tON accuracy tON_ACCURACY -10 - 10 % On-time range tON_RANGE 100 - 8000 ns Minimum off-time tOFF_MIN. - 250 - ns Soft start current ISS 2 5 7 μA Zero crossing detection point ZCD LX-PGND -3 - 3 mV S19-0910-Rev. C, 28-Oct-2019
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Document Number: 77113 For technical questions, contact: powerictechsupport@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000