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UCC3895 Datasheet(PDF) 5 Page - Texas Instruments |
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UCC3895 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 28 page  tDELAY = tf(OUTA) - tf(OUTC) tPERIOD OUTA OUTC tDELAY = tR(OUTB) - tf(OUTA) OUTA OUTB ( ) ( ) ( ) ( ) f OUTC f OUTA f OUTC f OUTB PERIOD PERIOD t t t t 180 or 180 t t - - F = ´ F = ´ UCC1895, UCC2895, UCC3895 www.ti.com SLUS157P – DECEMBER 1999 – REVISED JUNE 2013 ELECTRICAL CHARACTERISTICS (continued) 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 UNIT OUTPUT VOH High--level output voltage (all IOUT = –10 mA, VDD to output 250 400 mV outputs) VOL Low-level output voltage (all outputs) IOUT = 10 mA 150 250 mV tR Rise time(4) CLOAD = 100 pF 20 35 ns tF Fall time(4) CLOAD = 100 pF 20 35 ns PWM COMPARATOR EAOUT to RAMP input offset voltage RAMP = 0 V 0.72 0.85 1.05 V DELAB = DELCD = REF Minimum phase shift(5) RAMP = 0 V 0.0% 0.85% 1.4% (OUTA to OUTC, OUTB to OUTD) EAOUT = 650 mV tDELAY Delay(6) 0 V < RAMP < 2.5 V, EAOUT = 1.2 V 70 120 ns (RAMP to OUTC, RAMP to OUTD) DELAB = DELCD = REF IR(bias) RAMP bias current RAMP < 5 V, CT = 2.2 V –5 5 µA IR(sink) RAMP sink current RAMP = 5 V, CT = 2.6 V 12 19 mA (4) Ensured by design. Not production tested. (5) Minimum phase shift is defined as: where (a) tf(OUTA) = falling edge of OUTA signal (b) tf(OUTB) = falling edge of OUTB signal (c) tf(OUTC) = falling edge of OUTC signal, (d) tf(OUTD) = falling edge of OUTD signal (e) tPERIOD = period of OUTA or OUTB signal (6) Output delay is measured between OUTA and OUTB, or OUTC and OUTD. Output delay is defined as shown below where: tf(OUTA) = falling edge of OUTA signal, tr(OUTB) = rising edge of OUTB signal (see Figure 1 and Figure 2). Figure 2. Same Applies to OUTC and OUTD Figure 1. Same Applies to OUTB and OUTD Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: UCC1895 UCC2895 UCC3895 |
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