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LM3414MRX Fiches technique(PDF) 4 Page - Texas Instruments |
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LM3414MRX Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 25 page LM3414, LM3414HV SNVS678E – JUNE 2010 – REVISED MAY 2013 www.ti.com Electrical Characteristics (LM3414HV) (continued) Symbol Parameter Conditions Min Typ Max Units IIN-DIM-LOW Standby Current 4.5V ≤ Vin ≤ 65V 0.8 1.2 1.45 mA RIADJ = 3.125 kΩ VDIM = Low ILX-OFF LX Pin Current Main Switch Turned OFF 6.5 µA VLX = VIN= 65V Electrical Characteristics (LM3414/LM3414HV) Symbol Parameter Conditions Min Typ Max Units SYSTEM PARAMETERS ILED Average LED Current RIADJ = 3.125 kΩ 0.97 1 1.03 A TA = 25°C RIADJ = 3.125 kΩ 0.95 1 1.05 A TA = –40°C to 125°C VCC-UVLO Vcc UVLO Threshold VCC Decreasing 3.60 3.75 3.90 V VCC-UVLO-HYS Vcc UVLO Hysteresis 300 mV VIADJ IADJ Pin voltage 1.230 1.255 1.280 V VDIM DIM Pin Threshold VDIM Increasing 1.0 1.2 V VDIM-HYS DIM Pin Hysteresis 100 mV fSW Switching Frequency Range 250 500 1000 kHz fSW-TOL Switching Frequency Tolerance RFS = 40 kΩ 420 500 580 kHz tON-MIN Minimum On-time 400 ns INTERNAL VOLTAGE REGULATOR VCC VCC Regulator Output Voltage (1) CVCC = 1µF, No Load to IVCC = 2mA 4.7 5.4 6.0 V Vin = 4.5V, 2 mA Load 3.8 4.2 V MAIN SWITCH RLX Resistance Across LX and GND Main Switch Turned ON 1.8 Ω THERMAL PROTECTION TSD Thermal Shutdown Temperature TJ Rising 170 °C TSD-HYS Thermal Shutdown Temperature TJ Falling 10 °C Hysteresis THERMAL RESISTANCE θJA Junction to Ambient, SOIC-8 package 45 °C/W 0 LFPM Air Flow(2) WSON-8 package 54 °C/W (1) VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading to the pin. (2) Tested on a 4 layer JEDEC board. Four vias provided under the exposed pad. See JESD51-5 and JESD51-7. The value of the θJA for the WSON package is specifically dependent on the PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance and power dissipation for the WSON package, refer to Application Note AN-1187 (SNOA401). 4 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: LM3414 LM3414HV |
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