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UC28023DW Datasheet(PDF) 10 Page - Texas Instruments |
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UC28023DW Datasheet(HTML) 10 Page - Texas Instruments |
10 / 19 page UC28023 UC28025 SLUS557F -- MARCH 2003 -- REVISED AUGUST 2010 10 www.ti.com APPLICATION INFORMATION Figure 3. Open Loop Frequency Response 100 0 --40 1k 10 k 100 k 1 M 10 M 100 M --20 60 20 40 80 100 --180 --90 0 GAIN AND PHASE vs FREQUENCY fOSC -- Frequency -- Hz GAIN PHASE 3 2 5 4 1 0 0.2 0.4 0.6 0.8 1.0 tdelay -- Delay Time-- μs Figure 4. Unity Gain Slew Rate VOLTAGE vs TIME VOUT VIN CONTROL METHODS 6 7 CT UC2802x OSCILLATOR 1.25 V RAMP From Error Amplifier Figure 5. Voltage Mode Control UDG--03050 CT Figure 6. Peak Current Mode Control RSENSE UDG--03050 CT * A small filter may be required to supress switch noise. 6 7 CT UC2802x OSCILLATOR 1.25 V RAMP From Error Amplifier * * ISENSE |
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