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UC2854BQ Fiches technique(PDF) 5 Page - Texas Instruments |
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UC2854BQ Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 16 page UC1854B UC2854A, UC2854B UC3854A, UC3854B SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005 5 www.ti.com ELECTRICAL CHARACTERISTICS VCC = 18 V, RT = 8.2 kΩ, CT = 1.5 nF, VPKLMT = 1 V, VVRMS = 1.5 V, IIAC = 100 µA, IISENSE = 0 V, VCAO = 3.5 V, VVAO = 5 V, VVSENSE = 3 V, −40 °C < TA < 85°C for the UC2854A and UC2854B, and 0°C < TA <70°C for the UC3854A and UC3854B, and TA = TJ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 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 V Ramp valley voltage 0.8 1.3 V ENABLE/SOFT-START/CURRENT LIMIT Enable threshold voltage 2.35 2.55 2.80 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 Peak limit offset voltage −15 15 mV Peak limit input current VPKLMT = −0.1 V −200 −100 µA Peak limit propagation delay time(1) 150 ns MULTIPLIER Output current, IAC limited IAC = 100 µA, VRMS = 1 V, RSET = 10 kΩ −220 −200 −170 A Output current, zero IAC = 0 µA, RSET = 10 kΩ −2.0 −0.2 2.0 µA Output current, power limited VRMS = 1.5 V, Va = 6 V −230 −200 −170 VRMS = 1.5 V, Va = 2 V −22 µA Output current VRMS = 1.5 V, Va = 5 V −156 Output current VRMS = 5 V, Va = 2 V −2 µA VRMS = 5 V, Va = 5 V −14 µA Gain constant(2) VRMS = 1.5 V, Va = 6V, TA = 25°C −1.1 −1.0 −0.9 A/A GATE DRIVER VOH High-level output voltage IOUT = −200 mA, VCC = 15 V 12.0 12.8 V VOL Low-level output voltage IOUT = 200 mA 1.0 2.2 V IOUT = 10 mA 300 500 mV Low-level UVLO voltage IOUT = 50 mA, VCC = 0 V 0.9 1.5 V Output rise time(1) CLOAD = 1 nF 35 ns Output fall time(1) CLOAD = 1 nF 35 ns Output peak current(1) CLOAD = 10 nF 1.0 A (1) Ensured by design. Not production tested. (2) Gain constant. (K) + I IAC V VAO * 1.5 V V VRMS 2 I MOUT |
Numéro de pièce similaire - UC2854BQ |
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Description similaire - UC2854BQ |
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