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TL2843D-8 数据表(PDF) 5 Page - Texas Instruments |
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TL2843D-8 数据表(HTML) 5 Page - Texas Instruments |
5 / 12 page TL284x, TL384x CURRENT-MODE PWM CONTROLLERS SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999 5 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. |
类似零件编号 - TL2843D-8 |
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类似说明 - TL2843D-8 |
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