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MAX17497B Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX17497B Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 30 page AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step-Down Regulator MAX17497A/MAX17497B Maxim Integrated Products 3 ELECTRICAL CHARACTERISTICS (continued) (VIN = +15V, VEN/UVLO = +2V, COMPF = open, CIN = 1FF, CVCC = 1FF, TA = TJ = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS FLYBACK/BOOST CONVERTER Flyback/Boost Switching Frequency MAX17497A 235 250 265 kHz MAX17497B 470 500 530 Flyback/Boost Maximum Duty Cycle fSW = 250kHz (MAX17497A) 47.5 48.75 50 % fSW = 500kHz (MAX17497B) 88 92 96 SSF Pullup Current VSSF = 400mV 9 10 11 F A SSF Set Point Voltage 1.18 1.23 1.28 V SSF Peak Current-Limit Enable Threshold 1.11 1.17 1.21 V EAFN Input Bias Current 0V < VEAFN < 1.5V, TA = +25NC -100 +100 nA Error-Amplifier Open-Loop Voltage Gain 90 dB Error-Amplifier Transconductance VCOMPF = 2V, VRLIMF = 1V 1.5 1.8 2.1 mS Error-Amplifier Source Current VCOMPF = 2V, VEAFN = 1V 80 120 210 F A Error-Amplifier Sink Current VCOMPF = 2V, VEAFN = 1.5V 80 120 210 F A Current-Sense Transresistance 0.45 0.5 0.55 I IN Clamp Voltage EN/UVLO = SGND, IIN_ = 1mA (MAX17497A) (Note 3) 31 33.5 36 V LXF DMOS Switch On-Resistance (RDSON_LXF) ILXF = 200mA 175 380 mI LXF DMOS Peak Current Limit RLIMF = 100K 1.62 1.9 2.23 A LXF DMOS Runaway Current Limit RLIMF = 100K 1.9 2.3 2.6 A LXF Leakage Current VLXF = 65V, TA = +25NC 0.1 2 F A Peak Switch Current Limit with RLIMF Open 0.35 0.45 0.54 A Runaway Switch Current Limit with RLIMF Open 0.39 0.5 0.6 A RLIMF Reference Current 9 10 11 F A Number of Flyback/Boost Peak Current-Limit Hits Before Hiccup Timeout 8 # Number of Flyback/Boost Runaway Current-Limit Hits Before Hiccup Timeout 1 # |
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