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LM34917A 데이터시트(PDF) 4 Page - Texas Instruments |
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LM34917A 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 22 page LM34917A SNOSAX7D – DECEMBER 2007 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 12V, RON = 200kΩ. See (1) and (2). Symbol Parameter Conditions Min Typ Max Units UVLOGD hysteresis 450 mV Softstart Pin VSS Pull-up voltage 2.5 V ISS Internal current source 11.6 µA VRES Restart threshold after OVP 0.18 V shutdown Current Limit ILIM Threshold VIN = 8V, VFB = 2.4V 1.15 1.35 1.55 A VIN = 30V, VFB = 2.4V 1.05 1.2 1.45 VIN = 30V, VFB = 1.0V 0.95 1.15 1.35 Response time 150 ns On Timer tON - 1 On-time (normal operation) VIN = 10V, RON = 200 kΩ 2.1 2.8 3.5 µs tON - 2 On-time (normal operation) VIN = 32V, RON = 200 kΩ 860 ns tON - 3 On-time (current limit) VIN = 10V, RON = 200 kΩ 1.13 µs Shutdown threshold at RON/SD Voltage at RON/SD rising 0.3 0.65 1.0 V Shutdown Threshold hysteresis Voltage at RON/SD falling 40 mV Off Timer tOFF Minimum Off-time 90 ns Regulation and Over-Voltage Comparators (FB Pin) VREF FB regulation threshold SS pin = steady state 2.445 2.50 2.550 V FB over-voltage threshold 2.9 V FB bias current FB = 3V 10 nA Input Over-Voltage Shutdown VIN(OV) Shutdown voltage threshold at VIN increasing 33.0 34.8 36.9 V VIN Thermal Shutdown TSD Thermal shutdown temperature Junction temperature rising 175 °C Thermal shutdown hysteresis 20 °C Thermal Resistance θJA Junction to Ambient 58 °C/W 0 LFPM Air Flow 4 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LM34917A |
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유사한 설명 - LM34917A_15 |
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