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TL2844DR-8 Fiches technique(PDF) 7 Page - Texas Instruments |
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TL2844DR-8 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 12 page TL284x, TL384x CURRENT-MODE PWM CONTROLLERS SLVS038E – JANUARY 1989 – REVISED DECEMBER 1999 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics, VCC = 15 V (see Note 4), RT = 10 kΩ, CT = 3.3 nF, TA= 25°C (unless otherwise specified) (continued) error-amplifier section PARAMETER TEST CONDITIONS TL384xY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Feedback input voltage COMP at 2.5 V 2.50 V Input bias current –0.3 µA Open-loop voltage amplification VO = 2 V to 4 V 90 dB Gain-bandwidth product 1 MHz Supply-voltage rejection ratio VCC = 12 V to 25 V 70 dB Output sink current VFB at 2.7 V, COMP at 1.1 V 6 mA Output source current VFB at 2.3 V, COMP at 5 V –0.8 mA High-level output voltage VFB at 2.3 V, RL = 15 kΩ to GND 6 V Low-level output voltage VFB at 2.7 V, RL = 15 kΩ to GND 0.7 V NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. current-sense section PARAMETER TEST CONDITIONS TL384xY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Voltage amplification See Notes 6 and 7 3 V/V Current-sense comparator threshold COMP at 5 V, See Note 6 1 V Supply-voltage rejection ratio VCC = 12 V to 25 V, See Note 6 70 dB Input bias current –2 µA Delay time to output 150 ns 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 TL384xY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT High level output voltage IOH = –20 mA 13.5 V High-level output voltage IOH = –200 mA 13.5 V Low level output voltage IOL = 20 mA 0.1 V Low-level output voltage IOL = 200 mA 1.5 V Rise time CL = 1 nF 50 ns Fall time CL = 1 nF 50 ns NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. undervoltage-lockout section PARAMETER TL384xY UNIT PARAMETER MIN TYP MAX UNIT Start threshold voltage TL3842Y, TL3844Y 16 V Start threshold voltage TL3843Y, TL3845Y 8.4 V Minimum operating voltage after startup TL3842Y, TL3844Y 10 V Minimum operating voltage after startup TL3843Y, TL3845Y 7.6 V NOTE 4: Adjust VCC above the start threshold before setting it to 15 V. |
Numéro de pièce similaire - TL2844DR-8 |
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Description similaire - TL2844DR-8 |
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