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UCC25705DGKTRG4 Datasheet(PDF) 3 Page - Texas Instruments |
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UCC25705DGKTRG4 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 22 page  UCC25705, UCC25706, UCC35705, UCC35706 HIGH-SPEED VOLTAGE MODE PULSE WIDTH MODULATOR SLUS473B -- NOVEMBER 1999 -- REVISED OCTOBER 2010 3 www.ti.com electrical characteristics, VDD =11V, VIN =30 V,RT =47 k,RDISCH = 400 k, RFF =14 k,CT = 220 pF, CVDD =0.1 μF, and no load on the outputs, 0°C ≤ TA ≤ 70°C for the UCC3570x and --40°C ≤ TA ≤ 85°C for the UCC2570x, TA =TJ, (unless otherwise specified) line sense section PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Low line comparator threshold 0.95 1.00 1.05 V Input bias current (VFF) –100 100 nA oscillator section PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Frequency VFF = 1.2 V to 4.8 V 0.9 1.0 1.1 MHz CT peak voltage VFF = 1.2 V, See Note 1 1.2 V CT peak voltage VFF = 4.8 V, See Note 1 4.8 V CT valley voltage SeeNote1 0 V NOTE 1: Ensured by design. Not production tested. current limit section PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input bias current 0.2 –0.2 –1 μA Current limit threshold 180 200 220 mV Propagation delay, ILIM to OUT 50 mV overdrive 25 35 ns pulse width modulator section PARAMETER TEST CONDITIONS MIN TYP MAX UNITS FB input impedance VFB =3V 30 50 90 kΩ Minimum duty cycle VFB <2V 0 % Ma im m d t c cle VFB =VDD,FOSC =1MHz 70 75 80 % Maximum duty cycle VDISCH =0V, FOSC =1MHz 93 % PWM gain VFF = 2.5 V, MODE = 1 12 %/V Propagation delay, PWM to OUT 65 120 ns output section PARAMETER TEST CONDITIONS MIN TYP MAX UNITS VOH IOUT =–5mA, VDD – output 0.3 0.6 V VOL IOUT =5mA 0.15 0.4 V Rise time CLOAD =50pF 10 25 ns Fall time CLOAD =50pF 10 25 ns |
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