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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT1171HVC датащи(PDF) 3 Page - Linear Technology |
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LT1171HVC датащи(HTML) 3 Page - Linear Technology |
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3 / 20 page  3 LT1170/LT1171/LT1172 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VREF Reference Voltage Measured at Feedback Pin 1.224 1.244 1.264 V VC = 0.8V q 1.214 1.244 1.274 V IB Feedback Input Current VFB = VREF 350 750 nA q 1100 nA gm Error Amplifier ∆IC = ±25µA 3000 4400 6000 µmho Transconductance q 2400 7000 µmho Error Amplifier Source or VC = 1.5V 150 200 350 µA Sink Current q 120 400 µA Error Amplifier Clamp Hi Clamp, VFB = 1V 1.80 2.30 V Voltage Lo Clamp, VFB = 1.5V 0.25 0.38 0.52 V Reference Voltage Line 3V ≤ VIN ≤ VMAX q 0.03 %/V Regulation VC = 0.8V AV Error Amplifier Voltage Gain 0.9V ≤ VC ≤ 1.4V 500 800 V/V Minimum Input Voltage (Note 5) q 2.6 3.0 V IQ Supply Current 3V ≤ VIN ≤ VMAX, VC = 0.6V 6 9 mA Control Pin Threshold Duty Cycle = 0 0.8 0.9 1.08 V q 0.6 1.25 V Normal/Flyback Threshold 0.4 0.45 0.54 V on Feedback Pin VFB Flyback Reference Voltage IFB = 50µA 15.0 16.3 17.6 V (Note 5) q 14.0 18.0 V Change in Flyback Reference 0.05 ≤ IFB ≤ 1mA 4.5 6.8 9 V Voltage Flyback Reference Voltage IFB = 50µA 0.01 0.03 %/V Line Regulation (Note 5) 7V ≤ VIN ≤ VMAX Flyback Amplifier ∆IC = ±10µA 150 300 650 µmho Transconductance (gm) Flyback Amplifier Source VC = 0.6V Source q 15 32 70 µA and Sink Current IFB = 50µASink q 25 40 70 µA BV Output Switch Breakdown 3V ≤ VIN ≤ VMAX, LT1170/LT1171/LT1172 q 65 90 V Voltage ISW = 1.5mA LT1170HV/LT1171HV/LT1172HV q 75 90 V LT1172S8 q 60 80 V VSAT Output Switch LT1170 q 0.15 0.24 Ω “On” Resistance (Note 3) LT1171 q 0.30 0.50 Ω LT1172 q 0.60 1.00 Ω Control Voltage to Switch LT1170 8 A/V Current Transconductance LT1171 4 A/V LT1172 2 A/V ILIM Switch Current Limit (LT1170) Duty Cycle = 50% TJ ≥ 25°C q 510 A Duty Cycle = 50% TJ < 25°C q 511 A Duty Cycle = 80% (Note 4) q 410 A (LT1171) Duty Cycle = 50% TJ ≥ 25°C q 2.5 5.0 A Duty Cycle = 50% TJ < 25°C q 2.5 5.5 A Duty Cycle = 80% (Note 4) q 2.0 5.0 A (LT1172) Duty Cycle = 50% TJ ≥ 25°C q 1.25 3.0 A Duty Cycle = 50% TJ < 25°C q 1.25 3.5 A Duty Cycle = 80% (Note 4) q 1.00 2.5 A The q denotes the specifications which apply over the full operating tem- perature range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.5V, VFB = VREF, output pin open, unless otherwise noted. ELECTRICAL CHARACTERISTICS |
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