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L6996 Scheda tecnica(PDF) 4 Page - STMicroelectronics |
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L6996 Scheda tecnica(HTML) 4 Page - STMicroelectronics |
4 / 26 page L6996 4/26 ELECTRICAL CHARACTERISTICS (VCC = VDR = 5V; Tamb = 0°C to 70°C unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY SECTION Vin Input voltage range Vout=1V Fsw=110Khz Iout=1A 1 28 V Vcc, VDR 4.5 5.5 V Vccoff Turn-off voltage 4.1 4.3 V VHYST UVLO Hysteresys 60 90 100 mV Iqcc (VDR) Quiescent current driver VFB- > VFB+ 20 µA Iqcc (Vcc) Quiescent current VFB- > VFB+ 600 µA SHUTDOWN SECTION SHDN SHDN Threshold 0.6 1.2 V ISH (VDR) Driver quiescent current in shutdown. SHDN to GND 5 µA ISH (Vcc) Shut down current SHDN to GND 15 µA SOFT START SECTION ISS SS charge current 4 6 µA Soft-start active range 0.9 V ON TIME Ton On time duration Vprog=CS- =1.15 Osc=250mV 720 800 880 ns Vprog=CS-=1.15 Osc=500mV 355 420 485 ns Vprog=CS-=1.15 Osc=1V 210 250 290 ns Vprog=CS-=1.15 Osc=2V 120 150 180 ns OFF TIME Minimum Off Time 580 ns KOSC/TOFFMIN OSC=250mV VPROG=CS-=1.15V 0.28 DAC Vprog Voltage Accuracy VID0-4 see table 1 -1 +1 % PWM COMPARATOR Input voltage offset VPROG=1.6V=VFB- -2 +2 mV IVFB- Input bias current (VP) VVFB- =1.6V 4 5 6 µA CURRENT LIMIT AND ZERO CURRENT COMPARATOR ILIM ILIM input bias current CS-=VPROG=1.6V ILIM to GND = 120K Ω 4.95 µA KC Positive and negative Current Limit factor. RILIM = 120 KΩ 0.18 0.3 0.24 µA PHASE- GND Zero Crossing Comparator offset -2 2 mV GATE DRIVERS High side rise time VDR=5V; C=7nF HGATE - PHASE from 2 to 4.5V 50 70 ns High side fall time 50 70 ns Low side rise time 50 70 ns Low side fall time 50 70 ns PROTECTIONS OVP Over voltage trip CS- rising 117 120 123 % |
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