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UC2854B-EP Fiches technique(PDF) 6 Page - Texas Instruments |
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UC2854B-EP Fiches technique(HTML) 6 Page - Texas Instruments |
6 / 38 page UC2854B-EP SGLS318A – NOVEMBER 2005 – REVISED NOVEMBER 2015 www.ti.com 7.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OVERALL CAO = 0 V, VAO = 0 V, VCC = Supply current, off 250 400 µA VUVLO − 0.3 V Supply current, on 12 18 mA VCC turn-on threshold voltage 8 10.5 11.3 V VCC turn-off threshold voltage 9 10 12 V VCC clamp IVCC = IVCC(on) + 5 mA 18 20 22 V VOLTAGE AMPLIFIER Input voltage 2.9 3 3.1 V VSENSE bias current −500 −25 500 nA Open loop gain 2 V ≤ VOUT ≤ 5 V 70 100 dB VOH High-level output voltage ILOAD = −500 µA 6 V VOL Low-level output voltage ILOAD = 500 µA 0.3 0.5 V ISC Output short-circuit current VOUT = 0 V 1.5 3.5 mA Gain bandwidth product(1) fIN = 100 kHz, 10 mVP−P 1 MHz CURRENT AMPLIFIER VCM = 0 V, TA = 25°C −4 0 Input offset voltage mV VCM = 0 V, overtemperature −5.5 0 Input bias current, ISENSE VCM = 0 V −500 500 nA Open loop gain 2 V ≤ VOUT ≤ 6 V 80 110 dB VOH High-level output voltage ILOAD = −500 µA 8 V VOL Low-level output voltage ILOAD = 500 µA 0.3 0.5 V ISC Output short-circuit current VOUT = 0 V 1.5 3.5 mA CMRR Common mode rejection −0.3 5 V range Gain bandwidth product(1) fIN = 100 kHz, 10 mVP−P 3 5 MHz REFERENCE IREF = 0 mA, TA = 25°C 7.4 7.5 7.6 Output voltage V IREF = 0 mA 7.35 7.5 7.65 Load regulation 1 mA ≤ IREF ≤ 10 mA 0 8 20 mV Line regulation 12 V ≤ VCC ≤ 18 V 0 14 25 mV ISC Short circuit current VREF = 0 V 25 35 60 mA OSCILLATOR Initial accuracy TA = 25°C 85 100 115 kHz Voltage stability 12 V ≤ VCC ≤ 18 V 1% Total variation Line, temperature 80 120 kHz Ramp amplitude (peak-to-peak) 4.9 5.9 Ramp valley voltage 0.8 1.3 V ENABLE/SOFT-START/CURRENT LIMIT Enable threshold voltage 2.35 2.55 2.90 V Enable hysteresis VFAULT = 2.5 V 500 600 mV Enable input bias current VENA = 0 V −2 −5 µA Propagation delay to disable time(1) Enable overdrive = 100 mV 300 ns Soft-start charge current VSS = 2.5 V 10 14 24 µA Peak limit offset voltage −15 15 mV Peak limit input current VPKLMT = −0.1 V −200 −100 µA (1) Ensured by design. Not production tested. 6 Submit Documentation Feedback Copyright © 2005–2015, Texas Instruments Incorporated Product Folder Links: UC2854B-EP |
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