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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT3755 датащи(PDF) 3 Page - Linear Technology |
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LT3755 датащи(HTML) 3 Page - Linear Technology |
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3 / 24 page  LT3755/LT3755-1 3 37551fa ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp- erature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, CTRL = 2V, PWM = 5V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Minimum Operating Voltage VIN Tied to INTVCC 4.5 V VIN Shutdown IQ SHDN/UVLO = 0V, PWM = 0V SHDN/UVLO = 1.15V, PWM = 0V 0.1 1 5 μA μA VIN Operating IQ (Not Switching) VC = 0V, RT = 100k to GND 1.4 1.7 mA VREF Voltage 100μA ≤ IVREF ≤ 0μA l 1.965 2.00 2.045 V VREF Line Regulation 4.5V ≤ VIN ≤ 40V 0.006 %/V SENSE Current Limit Threshold 98 108 118 mV SENSE Input Bias Current Current Out of Pin 40 μA SS Pull-Up Current Current Out of Pin 8 10.5 13 μA Error Amplifier LED Current Sense Threshold (VISP – VISN) FB = 0V, VISP = 48V l 96 100 103 mV LED Current Sense Threshold at CTRL = 0V (VISP – VISN) CTRL = 0V, FB = 0V, VISP = 48V –13 –10 –8 mV CTRL Threshold Linear Programming Range 0 1.1 V CTRL Input Bias Current Current Out of Pin 50 100 nA LED Current Sense Amplifier Input Common Mode Range (VISP) 2.9 75 V ISP/ISN Short-Circuit Threshold (VISP – VISN)VISN = 0V 115 150 200 mV ISP/ISN Short-Circuit Fault Sensing Common Mode Range (VISN) 03 V ISP/ISN Input Bias Current PWM = 5V (Active), VISP = 48V PWM = 0V (Standby), VISP = 48V 50 0 0.1 μA μA LED Current Sense Amplifier gm VISP – VISN = 100mV 120 μS VC Output Impedance 1V < VVC < 2V 15000 kΩ VC Standby Input Bias Current PWM = 0V –20 20 nA FB Regulation Voltage (VFB) VISP = VISN l 1.232 1.220 1.250 1.250 1.265 1.270 V V FB Amplifier gm FB = VFB, VISP = VISN 480 μS FB Pin Input Bias Current Current Out of Pin 40 100 nA FB Open LED Threshold OPENLED Falling (LT3755 Only) VFB – 60mV VFB – 50mV VFB – 40mV V FB Overvoltage Threshold PWMOUT Falling VFB + 50mV VFB + 60mV VFB + 70mV V VC Current Mode Gain – ΔVVC/ΔVSENSE 4V/V Oscillator Switching Frequency RT = 100k RT = 10k l 90 925 105 1000 125 1050 kHz kHz Minimum Off-Time 170 ns |
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