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MAX5974DETE Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX5974DETE Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 27 page  Active-Clamped, Spread-Spectrum, Current-Mode PWM Controllers 3 ELECTRICAL CHARACTERISTICS (continued) (VIN = 12V (for MAX5974A/MAX5974C, bring VIN up to 17V for startup), VCS = VCSSC = VDITHER/SYNC = VFB = VFFB = VDCLMP = VGND, VEN = +2V, NDRV = AUXDRV = SS = COMP = unconnected, RRT = 34.8kI, RDT = 25kI, CIN = 1FF, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NDRV Switching Frequency Accuracy -8 +8 % Maximum Duty Cycle DMAX fSW = 250kHz 79 80 82 % SYNCHRONIZATION (SYNC) Synchronization Logic-High Input VIH-SYNC 2.91 V Synchronization Pulse Width 50 ns Synchronization Frequency Range fSYNCIN 1.1 x fSW 2 x fSW kHz Maximum Duty Cycle During Synchronization DMAX x fSYNC/ fSW % DITHERING RAMP GENERATOR (DITHER) Charging Current VDITHER = 0V 45 50 55 F A Discharging Current VDITHER = 2.2V 43 50 57 F A Ramp’s High Trip Point 2 V Ramp’s Low Trip Point 0.4 V SOFT-START AND RESTART (SS) Charging Current ISS-CH 9.5 10 10.5 F A Discharging Current ISS-D VSS = 2V, normal shutdown 0.65 1.34 2 mA ISS-DH (VEN < VENF or VIN < VINUVF), VSS = 2V, hiccup mode discharge for tRSTRT (Note 3) 1.6 2 2.4 F A Discharge Threshold to Disable Hiccup and Restart VSS-DTH 0.15 V Minimum Restart Time During Hiccup Mode tRSTRT-MIN 1024 Clock Cycles Normal Operating High Voltage VSS-HI 5 V Duty-Cycle Control Range VSS-DMAX DMAX (typ) = (VSS-DMAX/2.43V) 0 2 V DUTY-CYCLE CLAMP (DCLMP) DCLMP Input Current IDCLMP VDCLMP = 0 to 5V -100 0 +100 nA Duty-Cycle Control Range VDCLMP-R VDCLMP = 0.5V 73 75.4 77.5 % DMAX (typ) = 1 - (VDCLMP/2.43V) VDCLMP = 1V 54 56 58 VDCLMP = 2V 14.7 16.5 18.3 NDRV DRIVER Pulldown Impedance RNDRV-N INDRV (sinking) = 100mA 1.9 3.4 I Pullup Impedance RNDRV-P INDRV (sourcing) = 50mA 4.7 8.3 I Peak Sink Current 1 A Peak Source Current 0.65 A Fall Time tNDRV-F CNDRV = 1nF 14 ns Rise Time tNDRV-R CNDRV = 1nF 27 ns |
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Similar Description - MAX5974DETE |
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