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UCC28950 Datasheet(PDF) 6 Page - Texas Instruments |
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UCC28950 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 45 page UCC28950 SLUSA16A – MARCH 2010 – REVISED JULY 2010 www.ti.com ELECTRICAL CHARACTERISTICS (1) (continued) VDD = 12 V, TA = TJ = -40°C to 125°C, CVDD = 1 µF, CREF = 1 µF, RAB = 22.6 kΩ, RCD = 22.6 kΩ , REF = 13.3 kΩ, RSUM = 124 k Ω, RMIN = 88.7 kΩ, RT = 59 kΩ connected between RT pin and 5-V voltage supply to set FSW = 100 kHz (FOSC = 200 kHz) (unless otherwise noted). All component designations are from the Typical Application Diagram. PARAMETER TEST CONDITION MIN TYP MAX UNITS Light Load Efficiency Circuit VDCM = 0.4 V, Sweep CS confirm there are OUTE DCM threshold, T = 25°C 0.37 0.39 0.41 and OUTF pulses DCM threshold, T = 0°C to VDCM = 0.4 V, Sweep CS, confirm there are OUTE VDCM 0.364 0.390 0.416 V 85°C (8) and OUTF pulses DCM threshold, T= -40°C to VDCM = 0.4 V, Sweep CS, confirm there are OUTE 0.35 0.39 0.43 125°C (8) and OUTF pulses IDCM,SRC DCM Sourcing Current CS < DCM threshold 14 20 26 µA TMIN Total range RTMIN = 88.7 kΩ 425 525 625 ns OUTPUTS OUTA, OUTB, OUTC, OUTD, OUTE, OUTF ISINK/SRC Sink/Source peak current(8) 0.2 A TR Rise time CLOAD = 100 pF 9 25 ns TF Fall time CLOAD = 100 pF 7 25 RSRC Output source resistance IOUT = 20 mA 10 20 35 Ω RSINK Output sink resistance IOUT = 20 mA 5 10 30 THERMAL SHUTDOWN Rising threshold(8) 160 Falling threshold(8) 140 °C Hysteresis 20 (8) Verified during characterization only. 6 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): UCC28950 |
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