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UCC25706P Datasheet(PDF) 3 Page - Texas Instruments |
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UCC25706P Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 12 page  UCC25705, UCC25706, UCC35705, UCC35706 HIGHSPEED VOLTAGE MODE PULSE WIDTH MODULATOR SLUS473A – NOVEMBER 1999 – REVISED MARCH 2001 3 www.ti.com electrical characteristics, VDD = 11 V, 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 oltage 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 See Note 1 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 = 3 V 30 50 90 k Ω Minimum duty cycle VFB < 2 V 0 % Ma im m d t c cle VFB = VDD,FOSC = 1 MHz 70 75 80 % Maximum duty cycle VDISCH = 0 V, FOSC = 1 MHz 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 = –5 mA, VDD – output 0.3 0.6 V VOL IOUT = 5 mA 0.15 0.4 V Rise time CLOAD = 50 pF 10 25 ns Fall time CLOAD = 50 pF 10 25 ns |
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