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TL3843BD データシート(PDF) 6 Page - Texas Instruments |
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TL3843BD データシート(HTML) 6 Page - Texas Instruments |
6 / 24 page www.ti.com Error-Amplifier Section Electrical Characteristics Current-Sense Section Electrical Characteristics TL284xB, TL384xB HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS SLVS610B – AUGUST 2006 – REVISED JULY 2007 VCC = 15 V (1), R T = 10 kΩ, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified) TL284xB TL384xB PARAMETER TEST CONDITIONS UNIT MIN TYP(2) MAX MIN TYP(2) MAX Feedback input voltage COMP = 2.5 V 2.45 2.5 2.55 2.42 2.5 2.58 V Input bias current –0.3 –1 –0.3 –2 μA Open-loop voltage VO = 2 V to 4 V 65 90 65 90 dB amplification Gain-bandwidth product 0.7 1 0.7 1 MHz Supply-voltage rejection ratio VCC = 12 V to 25 V 60 70 60 70 dB Output sink current VFB = 2.7 V, COMP = 1.1 V 2 6 2 6 mA Output source current VFB = 2.3 V, COMP = 5 V –0.5 –0.8 –0.5 –0.8 mA VFB = 2.3 V, High-level output voltage 5 6 5 6 V RL = 15 kΩ to GND VFB = 2.7 V, Low-level output voltage 0.7 1.1 0.7 1.1 V RL = 15 kΩ to GND (1) Adjust VCC above the start threshold before setting it to 15 V. (2) All typical values are at TJ = 25°C. VCC = 15 V (1), R T = 10 kΩ, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified) TL284xB TL384xB PARAMETER TEST CONDITIONS UNIT MIN TYP(2) MAX MIN TYP(2) MAX Voltage amplification(3)(4) 2.85 3 3.15 2.85 3 3.15 V/V Current-sense comparator COMP = 5 V 0.9 1 1.1 0.9 1 1.1 V threshold(3) Supply-voltage rejection VCC = 12 V to 25 V 70 70 dB ratio(3) Input bias current –2 –10 –2 –10 μA Delay time to output VFB = 0 V to 2 V 150 300 150 300 ns (1) Adjust VCC above the start threshold before setting it to 15 V. (2) All typical values are at TJ = 25°C. (3) Measured at the trip point of the latch, with VFB at 0 V. (4) Measured between ISENSE and COMP, with the input changing from 0 V to 0.8 V. 6 Submit Documentation Feedback |
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