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LM2744 датащи(PDF) 4 Page - Texas Instruments |
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LM2744 датащи(HTML) 4 Page - Texas Instruments |
4 / 33 page LM2744 SNVS292F – SEPTEMBER 2004 – REVISED MARCH 2013 www.ti.com ELECTRICAL CHARACTERISTICS (1) (continued) VCC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA= TJ= 25°C. Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are specified by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units IVREF Current into VREF Pin 1.5V ≥ VREF ≥ 0.5V 50 nA GATE DRIVE IQ-BOOT BOOT Pin Quiescent Current VBOOT = 12V, VSD = 0 18 90 µA RHG_UP High-Side MOSFET Driver Pull-Up ON VBOOT - VSW = 9.5V at 350mA 3 Ω resistance RHG_DN High-Side MOSFET Driver Pull-Down VBOOT - VSW = 4.5V at 350mA 2 Ω ON resistance RLG_UP Low-Side MOSFET Driver Pull-Up ON VBOOT - VSW = 9.5V at 350mA 3 Ω resistance RLG_DN Low-Side MOSFET Driver Pull-Down VBOOT - VSW = 4.5V at 350mA 2 Ω ON resistance OSCILLATOR RFADJ = 702.1 kΩ 50 RFADJ = 98.74 kΩ 300 FSW PWM Frequency kHz RFADJ = 45.74 kΩ 475 600 725 RFADJ = 24.91 kΩ 1000 D Max High-Side Duty Cycle FSW = 300kHz 80 % FSW = 600kHz 76 FSW = 1MHz 73 LOGIC INPUTS AND OUTPUTS V STBY-IH Standby High Trip Point VFB = 0.575V, VBOOT = 3.3V, VSD 1.1 V Rising V STBY-IL Standby Low Trip Point VFB = 0.575V, VBOOT = 3.3V, VSD 0.232 V Falling V SD-IH SD Pin Logic High Trip Point VSD Rising 1.3 V V SD-IL SD Pin Logic Low Trip Point VSD Falling 0.8 V VPWGD-TH-LO PWGD Pin Trip Points FB Falling, VREF = 0.5V 0.3262 0.347 0.3678 V FB Falling, VREF = 1.5V 0.993 1.045 1.097 V VPWGD-TH-HI PWGD Pin Trip Points FB Rising, VREF = 0.5V 0.551 0.586 0.621 V FB Rising, VREF = 1.5V 1.6692 1.757 1.8448 V VPWGD-HYS PWGD Hysteresis FB Falling 60 mV FB Rising 90 4 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated Product Folder Links: LM2744 |
Аналогичный номер детали - LM2744 |
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Аналогичное описание - LM2744 |
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