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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM25115AMT/NOPB датащи(PDF) 5 Page - Texas Instruments |
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LM25115AMT/NOPB датащи(HTML) 5 Page - Texas Instruments |
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5 / 30 page  LM25115A www.ti.com SNVS501B – FEBRUARY 2007 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS (1) (continued) Unless otherwise specified, TJ = –40°C to +125°C, VBIAS = 12V, No Load on LO or HO. Symbol Parameter Conditions Min Typ Max Units TRACK / SOFT-START SS Pull-up Source 10 15 20 µA SS Discharge Impedance 140 Ω ERROR AMPLIFIER and FEEDBACK REFERENCE VREF FB Reference Voltage Measured at FB pin .737 .750 .763 V FB Input Bias Current FB = 2V 0.2 0.5 µA COMP Source Current 300 µA Open Loop Voltage Gain 60 dB GBW Gain Bandwidth Product 4 MHz Vio Input Offset Voltage 22 mV COMP Offset Threshold for VHO = high RAMP = CS = 2 V VOUT = 0V RAMP Offset Threshold for VHO = high COMP = 1.5V, 1.0 V CS = VOUT = 0V CURRENT SENSE AMPLIFIER Current Sense Amplifier Headroom Headroom = Vbias – Vout 3 V Vbias= 4.5 V and Vout= 1.5 V Current Sense Amplifier Gain 16 V/V Output DC Offset 1.27 V Amplifier Bandwidth 500 kHz CURRENT LIMIT Slow ILIMIT Amp Transconductance 5 mA / V Overall Transconductance 90 mA / V Slow ILimit Threshold VCL = VCS - VVOUT 39 45 51 mV VOUT = 6V and CO/COMP = 1.5V Slow ILimit Foldback VCL = VCS - VVOUT 34 39 46 mV VOUT = 0V and CO/COMP = 1.5V Fast ILimit Pull-Down Current Vds = 2V 45 mA Fast ILimit Threshold 60 mV VCLNEG Negative Current Limit VOUT = 6V -17 mV VCL = VCS - VVOUT to cause LO to shutoff CO Clamp Voltage 5.5 6 6.5 V ICO Pull-Up Current 15 µA RAMP GENERATOR SYNC Input Impedance 2.5 k Ω SYNC Threshold End of cycle detection threshold 20 µA Free Run Mode Peak Threshold RAMP peak voltage with dc current 2.35 V applied to SYNC. Current Mirror Gain Ratio of RAMP charge current to SYNC 2.7 3.3 A/A input current. Discharge Impedance 100 Ω LOW-SIDE GATE DRIVER VOLL LO Low-state Output Voltage ILO = 100mA 0.15 0.5 V VOHL LO High-state Output Voltage ILO = -100mA, VOHL = VCC -VLO 0.35 0.8 V LO Rise Time CLOAD = 1000pF 15 ns LO Fall Time CLOAD = 1000pF 12 ns IOHL Peak LO Source Current VLO = 0V 2 A IOLL Peak LO Sink Current VLO = 12V 2.5 A Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM25115A |
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