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TL2845DRG4 датащи(PDF) 6 Page - Texas Instruments |
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TL2845DRG4 датащи(HTML) 6 Page - Texas Instruments |
6 / 21 page TL284x, TL384x CURRENT-MODE PWM CONTROLLERS SLVS038G − JANUARY 1989 − REVISED FEBRUARY 2008 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range, VCC = 15 V (see Note 4), RT = 10 kΩ, CT = 3.3 nF (unless otherwise specified) (continued) current-sense section PARAMETER TEST CONDITIONS TL284x TL384x UNIT PARAMETER TEST CONDITIONS MIN TYP† MAX MIN TYP† MAX UNIT Voltage amplification See Notes 6 and 7 2.85 3 3.13 2.85 3 3.15 V/V Current-sense comparator threshold COMP at 5 V, See Note 6 0.9 1 1.1 0.9 1 1.1 V Supply-voltage rejection ratio VCC = 12 V to 25 V, See Note 6 70 70 dB Input bias current −2 −10 −2 −10 µA Delay time to output 150 300 150 300 ns † All typical values are at TA = 25°C. NOTES: 4. Adjust VCC above the start threshold before setting it to 15 V. 6. These parameters are measured at the trip point of the latch, with VFB at 0 V. 7. Voltage amplification is measured between ISENSE and COMP, with the input changing from 0 V to 0.8 V. output section PARAMETER TEST CONDITIONS TL284x TL384x UNIT PARAMETER TEST CONDITIONS MIN TYP† MAX MIN TYP† MAX UNIT High level output voltage IOH = −20 mA 13 13.5 13 13.5 V High-level output voltage IOH = −200 mA 12 13.5 12 13.5 V Low level output voltage IOL = 20 mA 0.1 0.4 0.1 0.4 V Low-level output voltage IOL = 200 mA 1.5 2.2 1.5 2.2 V Rise time CL = 1 nF, TA = 25°C 50 150 50 150 ns Fall time CL = 1 nF, TA = 25°C 50 150 50 150 ns † All typical values are at TA = 25°C. NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. undervoltage-lockout section PARAMETER TL284x TL384x UNIT PARAMETER MIN TYP† MAX MIN TYP† MAX UNIT Start threshold voltage TLx842, TLx844 15 16 17 14.5 16 17.5 V Start threshold voltage TLx843, TLx845 7.8 8.4 9 7.8 8.4 9 V Minimum operating voltage after startup TLx842, TLx844 9 10 11 8.5 10 11.5 V Minimum operating voltage after startup TLx843, TLx845 7 7.6 8.2 7 7.6 8.2 V † All typical values are at TA = 25°C. NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. pulse-width-modulator section PARAMETER TL284x TL384x UNIT PARAMETER MIN TYP† MAX MIN TYP† MAX UNIT Maximum duty cycle TLx842, TLx843 95 97 100 95 97 100 Maximum duty cycle TLx844, TLx845 46 48 50 46 48 50 % Minimum duty cycle 0 0 † All typical values are at TA = 25°C. NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. |
Аналогичный номер детали - TL2845DRG4 |
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Аналогичное описание - TL2845DRG4 |
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