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UCC2895DWG4 Datasheet(PDF) 5 Page - Texas Instruments |
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UCC2895DWG4 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 25 page UCC1895 UCC2895 UCC3895 SLUS157L − DECEMBER 1999 − REVISED APRIL 2008 5 www.ti.com ELECTRICAL CHARACTERISTICS VDD = 12 V, RT = 82 kΩ, CT = 220 pF, RDELAB = 10 kΩ, RDELCD = 10 kΩ, CREF = 0.1 µF, CVDD = 0.1 µF and no load on the outputs, TA = TJ. TA = 0°C to 70°C for UCC3895x, TA = −40°C to 85°C for UCC2895x and TA = −55°C to 125°C for the UCC1895x. (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS CURRENT SENSE ICS(bias) Current sense bias current 0 V < CS < 2.5 V, 0 V ADS < 2.5 V −4.5 20 µA Peak current threshold 1.90 2.00 2.10 V Overcurrent threshold 2.4 2.5 2.6 V Current sense to output delay 0V ≤ CS ≤ 2.3 V, DELAB=DELCD=REF 75 110 ns SOFT-START/SHUTDOWN ISOURCE Softstart source current SS/DISB = 3.0 V, CS = 1.9 V −40 −35 −30 µA ISINK Softstart sink current SS/DISB = 3.0 V, CS = 2.6 V 325 350 375 µA Softstart/disable comparator threshold 0.44 0.50 0.56 V ADAPTIVE DELAY SET (ADS) DELAB/DELCD output voltage ADS = CS = 0 V 0.45 0.50 0.55 V DELAB/DELCD output voltage ADS = 0 V, CS = 2.0 V 1.9 2.0 2.1 V tDELAY Output delay(1)(3) ADS = CS = 0 V 450 560 620 ns ADS bias current 0 V < ADS < 2.5 V, 0 V < CS < 2.5 V −20 20 µA OUTPUT VOH High−level output voltage (all outputs) IOUT = −10 mA, VDD to output 250 400 mV VOL Low-level output voltage (all outputs) IOUT = 10 mA 150 250 mV tR Rise time(1) CLOAD = 100 pF 20 35 ns tF Fall time(1) CLOAD = 100 pF 20 35 ns (1) Ensured by design. Not production tested. (2) Minimum phase shift is defined as: F + 180 t f (OUTC) * tf (OUTA) t PERIOD or F + 180 t f (OUTC) * tf (OUTB) t PERIOD where tf(OUTA) = falling edge of OUTA signal, tf(OUTB) = falling edge of OUTB signal tf(OUTC) = falling edge of OUTC signal, tf(OUTD) = falling edge of OUTD signal tPERIOD = period of OUTA or OUTB signal (3) Output delay is measured between OUTA/OUTB or OUTC/OUTD. Output delay is defined as shown below where: tf(OUTA) = falling edge of OUTA signal, tr(OUTB) = rising edge of OUTB signal t PERIOD OUTA OUTC OUTA OUTB Same applies to OUTB and OUTD Same applies to OUTC and OUTD tDELAY = tf(OUTC) − tf(OUTA) tDELAY = tR(OUTB) − tf(OUTA) |
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