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IR3531A Datasheet(PDF) 12 Page - International Rectifier |
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IR3531A Datasheet(HTML) 12 Page - International Rectifier |
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12 / 39 page  4+1 Phase Dual Output Control IC IR3531A March 22, 2012 | FINAL | V1.11 12 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Maximum PWM Ramp Floor Voltage MINFLOOR IOUT = DACIN – 200mV Measure relative to floor voltage 100 180 22 0 mV Minimum PWM Ramp Floor Voltage MAXFLOOR IOUT = DACIN + 200mV Measure relative to floor voltage -220 -160 -100 mV Over Voltage Protection (OVP) Comparators Threshold at Power-up OVPPUP 1.615 1.65 1.67 V Threshold during Normal Operation OVPTHR Compare to VID Voltage + VID offset 100 130 150 mV Propagation Delay to OVP OVPPROP Measure time from V(FB), V(FB1) > VID voltage + VID offset (250mV overdrive) to V(PWM) transition to > 0.5 * V(VCC) - 90 180 ns Over-Current Comparator Input Filter Time Constant - 2 - µs Over-Current Threshold OCTHRSH VDRP-VDAC, VDRP1-VDAC1 0.94 1.08 1.18 V OC Threshold PSI Reduction Factor OCPSI PSI mode, 4ph to 2ph, 2ph to 1ph 450 540 610 mV PSI mode, 3ph to 1ph 310 360 410 3ph to 2ph 640 720 800 PSI mode, 4ph to 1ph 220 270 310 4ph to 3ph 690 800 900 OC Delay Time OCDELAY Delay to OC shutdown 225 256 285 µs VCC Undervoltage VCC UVL Start VCCSTART 5.5 5.85 6.4 V VCC UVL Stop VCCSTOP 4.85 5.2 5.65 V VCC UVL Hysteresis VCCHYST 515 650 830 mV VRRDY Output Output Voltage VRRDYLO I(VRRDY, VDRRY1) = 4mA - 150 300 mV Leakage Current VRRDYLEAK V(VRRDY, VDRRY1) = 5.5V - 0 10 µA VCC Activation Voltage VRRDYVCC I(VDRRY, VDRRY1) = 4mA, <300mV 1 2 3.6 V VO-TRACK Undervoltage Threshold VOUVFALL Reference to TRACK -260 -200 -130 mV VO-VDAC Undervoltage Threshold VOUVRISE Reference to VDAC -340 -290 -230 mV Open Sense Line Detection Sense Line Detection Active Comparator Threshold Voltage OPENACT 100 150 200 mV Sense Line Detection Active Comparator Offset Voltage OPENOFF V(VO) < [V(VOSEN+) – V(LGND)] / 2 25 60 80 mV VOSEN+ Open Sense Line Comparator Threshold OPENCOMP+ Compare to V(VCC) 82 90 92 % |
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