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TL3842PE4 Datasheet(PDF) 8 Page - Texas Instruments |
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TL3842PE4 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 21 page 
TL284x, TL384x CURRENT-MODE PWM CONTROLLERS SLVS038G − JANUARY 1989 − REVISED FEBRUARY 2008 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Zi Zf VFB COMP 2.5 V 0.5 mA Error Amplifier NOTE A: Error amplifier can source or sink up to 0.5 mA. + − Figure 1. Error-Amplifier Configuration NOTE A: Peak current (IS) is determined by the formula: A small RC filter formed by resistor Rf and capacitor Cf may be required to suppress switch transients. COMP ISENSE GND RS Cf Rf Error Amplifier 2R R1 V Current-Sense Comparator I S(max) + 1V R S IS (see Note A) + − Figure 2. Current-Sense Circuit CT RT (see Note A) NOTE A: For RT > 5 kΩ: REF RT/CT GND f [ 1.72 R TCT Figure 3. Oscillator Section |
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