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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC7813 датащи(PDF) 3 Page - Linear Technology |
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LTC7813 датащи(HTML) 3 Page - Linear Technology |
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3 / 36 page  LTC7821 3 Rev A For more information www.analog.com PIN CONFIGURATION ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops VIN Input Voltage Range 10 72 V Output Voltage Range (Note 4) 0.9 VIN 2 – 2.5 V VFB Regulated Feedback Voltage ITH Voltage (Note 5) l 0.792 0.8 0.808 V IFB Feedback Current (Note 5) ±10 ±50 nA VREFLNREG Reference Voltage Line Regulation VIN = 36V to 72V (Note 5) 0.003 0.02 %/V VLOADREG Output Voltage Load Regulation (Note 5) ΔITH Voltage = 1.2V to 0.7V ΔITH Voltage = 1.2V to 1.6V l l 0.016 –0.016 0.1 –0.1 % % gm Transconductance Amplifier gm ITH = 1.2V; Sink/Source 5µA (Note 5) 2 mmho IVIN Input DC Supply Current Normal Mode Shutdown Precharging Phase (Note 6) VRUN = 0V, EXTVCC = 0V VIN = 20V, VMID = VMID_SENSE = 9V, VSW1 = 15V, VSW3 = 10V VIN = 48V, VMID = VMID_SENSE = 20V, VSW1 ≥ 36V, VSW3 = 12V 0.5 240 40 84 mA µA mA mA IVIN_SENSE Input DC Supply Current Normal Mode Shutdown (Note 6) VRUN = 0V 1 45 mA µA IEXTVCC Input DC Supply Current (Note 6) 2.2 mA IMID MID Pin Current 45 μA IMID_SENSE MID_SENSE Pin Current 4 μA VUVLO VIN Undervoltage Lockout VIN Ramping Up l 8.8 9.4 V VUVLO_HYST UVLO Hysteresis 0.28 V VSENSE Current Sense Threshold VISNS– = 0V l 45 50 55 mV ISNS+/- ISNS+ and ISNS– Pin Current VISNS+ = VISNS– = 12V l 1.2 μA ITRACK/SS Soft-Start Charge Current VTRACK/SS = 0V –9 –10 –11 μA VRUN_ON RUN Pin On Threshold VRUN Rising l 1.1 1.3 1.6 V IRUN RUN Pin Current VRUN = 0V 1 μA VRUN_HYST RUN Pin Hysteresis 0.1 V VEXT_REF_UC EXT_REF Upper Clamp Limit (Note 5) l 0.85 0.9 V VEXT_REF_LC EXT_REF Lower Clamp Limit (Note 5) l 0.40 0.45 V VSEL_EXT_REF EXT_REF De-Select Threshold (Ramping Up) 1.3 V IEXT_REF EXT_REF Pin Current VEXT_REF = 0.6V –150 nA VTEMP_TRIP TEMP Pin Trip Point, Rising l 1.22 1.25 V VTEMP_TRIP_HYST TEMP Pin Trip Point Hysteresis 100 mV ITEMP TEMP Pin Current VTEMP = 1V 1 nA VBSTUVLO Undervoltage Lockout of (BOOST1-SW1), (BOOST2- VMID) and (BOOST3-SW3) Difference Voltage, Rising 4.4 V VBSTUVLO_HYST Bootstrap Undervoltage Lockout Hysteresis 1.4 V TOUT TEMP Trip TimeOut 100 ms The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VIN_SENSE = 48V, VRUN = 5V, EXTVCC = 9V, EXT_REF = 5.6V unless otherwise noted. |
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