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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT1683 датащи(PDF) 3 Page - Linear Technology |
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LT1683 датащи(HTML) 3 Page - Linear Technology |
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3 / 24 page  3 LT1683 1683f ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and other pins open unless otherwise noted. Oscillator and Sync fMAX Max Switch Frequency 250 kHz fSYNC Synchronization Frequency Range Oscillator Frequency = 250kHz 290 kHz VSYNC SYNC Pin Input Threshold q 0.7 1.4 2.0 RSYNC SYNC Pin Input Resistance 40 k Ω Gate Drives (Specifications Apply to Either A or B Unless Otherwise Noted) DCMAX Maximum Switch Duty Cycle RVSL = RCSL = 4.85k, q 45 46 % Osc Frequency = 25kHz VGON Gate On Voltage VIN = 12, GCL = 12 10 10.4 10.7 V VIN = 12, GCL = 8 7.6 7.9 8.1 V VGOFF Gate Off Voltage VIN = 12V 0.2 0.35 V IGSO Max Gate Source Current VIN = 12V 0.3 A IGSK Max Gate Sink Current VIN = 12V 0.3 A VINUVLO Gate Drive Undervoltage Lockout (Note 5) VGCL = 6.5V, Gates Enabled 7.3 7.5 V Current Sense tIBL Switch Current Limit Blanking Time 100 ns VSENSE Sense Voltage Shutdown Voltage VC Pulled Low q 86 103 120 mV VSENSEF Sense Voltage Fault Threshold q 230 300 mV Slew Control (for the Following Slew Tests See Test Circuit in Figure 1b) VSLEWR Output Voltage Slew Rising Edge RVSL = RCSL = 17k 26 V/ µs VSLEWF Output Voltage Slew Falling Edge RVSL = RCSL = 17k 19 V/ µs VISLEWR Output Current Slew Rising Edge (CS Pin Voltage) RVSL = RCSL = 17k 2.1 V/ µs VISLEWF Output Current Slew Falling Edge (CS Pin Voltage) RVSL = RCSL = 17k 2.1 V/ µs Supply and Protection VINMIN Minimum Input Voltage (Note 4) VGCL = VIN q 2.55 3.6 V IVIN Supply Current (Note 2) RVSL = RCSL = 17k, VIN = 12 q 25 45 mA RVSL = RCSL = 17k, VIN = 20 q 35 55 mA VSHDN Shutdown Turn-On Threshold q 1.31 1.39 1.48 V ∆VSHDN Shutdown Turn-On Voltage Hysteresis q 50 110 180 mV ISHDN Shutdown Input Current Hysteresis q 10 24 35 µA V5 5V Reference Voltage 6.5V ≤ VIN ≤ 20V, IV5 = 5mA 4.85 5 5.20 V 6.5V ≤ VIN ≤ 20V, IV5 = –5mA 4.80 5 5.15 V IV5SC 5V Reference Short-Circuit Current VIN = 6.5V Source 10 mA VIN = 6.5V Sink –10 mA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Supply current specification includes loads on each gate as in Figure 1a. Actual supply currents vary with operating frequency, operating voltages, V5 load, slew rates and type of external FET. Note 3: The LT1683E is guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40°C to 125°C operating range are assured by design, characterization and correlation with statistical process controls. The LT1683I is guaranteed and tested over the – 40 ° to 125 ° operating temperature range. Note 4: Output gate drivers will be enabled at this voltage. The GCL voltage will also determine drivers’ activity. Note 5: Gate drivers are ensured to be on when VIN is greater than the maximum value. |
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