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UCC2808N-1G4 Datasheet(PDF) 5 Page - Texas Instruments |
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UCC2808N-1G4 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 22 page COMP CS CS V A ,0 V 0.4V V D = £ £ D (3) Gain is defined by: 0 v VCS v 0.4 V UCC2808-1, UCC2808-2, UCC3808-1, UCC3808-2 www.ti.com SLUS168E – APR 1999 – REVISED AUGUST 2015 Electrical Characteristics (continued) TA = 0°C to 70°C for the UCC3808-x, –40°C to 85°C for the UCC2808-x and –55°C to 125°C for the UCC1808-x, VDD = 10 V (1), 1-μF capacitor from VDD to GND, R = 22 kΩ , C = 330 pF, T A = TJ , (unless otherwise specified) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT COMP source current FB = 1.3 V, COMP = 3.5 V –0.25 –0.5 mA PWM SECTION Maximum duty cycle Measured at OUTA or OUTB 48% 49% 50% Minimum duty cycle COMP = 0 V 0% CURRENT SENSE SECTION Gain(3) 1.9 2.2 2.5 V/V Maximum input signal COMP = 5 V (4) 0.45 0.5 0.55 V COMP = 3.5 V, CS from 0 to 600 CS to output delay 100 200 ns mV CS source current –200 nA Over current threshold 0.7 0.75 0.8 V COMP to CS offset CS = 0 V 0.35 0.8 1.2 V OUTPUT SECTION OUT low level I = 100 mA 0.5 1 V OUT high level I = – 50 mA, VDD – OUT 0.5 1 V Rise time CL = 1 nF 25 60 ns Fall time CL = 1 nF 25 60 ns UNDERVOLTAGE LOCKOUT SECTION UCCx808-1 (1) 11.5 12.5 13.5 Start threshold V UCCx808-2 4.1 4.3 4.5 UCCx808-1 7.6 8.3 9 Minimum operating voltage after V start UCCx808-2 3.9 4.1 4.3 UCCx808-1 3.5 4.2 5.1 Hysteresis V UCCx808-2 0.1 0.2 0.3 SOFT-START SECTION COMP rise time FB = 1.8 V, rise from 0.5 V to 4 V 3.5 20 ms OVERALL SECTION Start-up current VDD < start threshold 130 260 µA Operating supply current FB = 0 V, CS = 0 V (5) (1) 1 2 mA VDD zener shunt voltage IDD = 10 mA (6) 13 14 15 V (4) Parameter measured at trip point of latch with FB at 0 V. (5) For UCCx808 – 1, set VDD above the start threshold before setting at 10 V (6) Start threshold and Zener shunt threshold track one another. Copyright © 1999–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: UCC2808-1 UCC2808-2 UCC3808-1 UCC3808-2 |
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