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UCC28056CDBVT Datasheet(PDF) 9 Page - Texas Instruments |
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UCC28056CDBVT Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 55 page  9 UCC28056 www.ti.com SLUSD37E – OCTOBER 2017 – REVISED NOVEMBER 2019 Product Folder Links: UCC28056 Submit Documentation Feedback Copyright © 2017–2019, Texas Instruments Incorporated Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TONMAX2 Maximum ON time when GFF = GFF2 8.85 9.41 9.64 µs TONMAX3 Maximum ON time when GFF = GFF3 7.59 8.07 8.32 µs TONMAX4 Maximum ON time when GFF = GFF4 6.52 6.92 7.18 µs TONMAX5 Maximum ON time when GFF = GFF5 5.56 5.93 6.16 µs TONMAX6 Maximum ON time when GFF = GFF6 4.73 5.09 5.28 µs TONMAX7 Maximum ON time when GFF = GFF7 4.07 4.36 4.57 µs Burst Mode Operation See Device Comparison Table Zero Current Detection and Valley Synch VZcdVinHyst ZcdVin Comparator hysteresis (1) 12 19 26 mV TDCHVinMin ZcdVin Comparator blanking from DRV falling edge (1) 250 358 467 ns TZCDTo If no negative transitions on Vin comparator for this period then do not wait for valleys 2.035 2.4 3.0 µs TZCDR0 Minimum ZCD to DRV delay. From VZC < VInSynth to DRV = 6V, CDR = 1nF, Fres = 1.2MHz, RDG = RDG0 170 235 ns ΔTZCDR1 TZCDR1 = TZCDR0 + ΔTZCDR1 (1) RDG = RDG1 34.6 45.5 58.5 ns ΔTZCDR2 TZCDR2 = TZCDR0 + ΔTZCDR2 (1) RDG = RDG2 76 90 107 ns ΔTZCDR3 TZCDR3 = TZCDR0 + ΔTZCDR3 (1) RDG = RDG3 114 130 147 ns ΔTZCDR4 TZCDR4 = TZCDR0 + ΔTZCDR4 (1) RDG = RDG4 157 175 193 ns ΔTZCDR5 TZCDR5 = TZCDR0 + ΔTZCDR5 (1) RDG = RDG5 229 255 281 ns ΔTZCDR6 TZCDR6 = TZCDR0 + ΔTZCDR6 (1) RDG = RDG6 301 335 369 ns ΔTZCDR7 TZCDR7 = TZCDR0 + ΔTZCDR7 (1) RDG = RDG7 373 415 457 ns VDDAmpl Amplitude of 500 kHz sinewave signal on ZCD/CS pin needed to trigger knee detector 25 mV TDCHDDMin Knee point detector blanking period (1) Measured from falling edge of DRV pulse 1.5 µs Fault Protection TLongFlt Long Fault Duration (1) 1 s Line Brown-In Protection VZCBoRise Brown-out Protection Threshold when in Stopb state Peak cycle average voltage on ZCD/CS Pin. 0.282 0.3 0.318 V IZCBias ZCD/CS Pin Bias Current (1) VZC = VZCBoFall -100 100 nA Over-Current Protection VZCOcp1 ZCD/CS First Level over-current protection threshold 450 500 550 mV VZCOcp2 ZCD/CS Second Level over-current protection threshold 670 750 825 mV TOcp1Blk ZCD/CS blanking time from DRV rising edge to Enable Ocp1 Comparator Output (1) 450 ns TOcp2Blk ZCD/CS blanking time from DRV rising edge to Enable Ocp2 Comparator Output (1) 250 ns TOcpDrvDel ZCD/CS crossing VOcpxTh to DRV falling edge. 56 120 ns TDCHMax0 Max duration of TDCHb state if no ZCD signal detected. After no OCPx Events (1) 250 µS |
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