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LT1640AHCN8 Datasheet(PDF) 4 Page - Linear Technology |
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LT1640AHCN8 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 16 page  4 LT1640AL/LT1640AH Gate Voltage vs Temperature TEMPERATURE ( °C) 12.0 13.0 14.0 15.0 12.5 13.5 14.5 –25 0 75 1640A G04 100 –50 25 50 VDD = 48V TEMPERATURE ( °C) –50 48 49 51 52 53 55 25 0 50 1640A G05 50 54 100 –25 75 TEMPERATURE ( °C) –50 48 47 46 45 44 43 42 41 40 75 1640A G06 – 25 100 50 25 0 VGATE = 0V Gate Pull-Up Current vs Temperature Gate Pull-Down Current vs Temperature TEMPERATURE ( °C) –50 49 52 55 75 1640A G07 46 43 40 –25 0 25 50 100 VGATE = 2V PWRGD Output Low Voltage vs Temperature (LT1640AL) TEMPERATURE ( °C) –50 0.3 0.4 0.5 75 1640A G08 0.2 0.1 0 –25 25 0 50 100 IOUT = 1mA TEMPERATURE ( °C) –50 2 3 4 5 6 7 8 –25 25 050 75 1640A G09 100 VDRAIN – VEE > 2.4V PWRGD Output Impedance vs Temperature (LT1640AH) Circuit Breaker Trip Voltage vs Temperature When the DRAIN pin of the LT1640AH is above VEE by more than VPG, the PWRGD pin will sink current to the DRAIN pin which pulls the module’s enable pin low, forcing it off. When VDRAIN drops below VPG, the PWRGD sink current is turned off and a 6.5k resistor is connected between PWRGD and DRAIN, allowing the module’s pull- up current to pull the enable pin high and turn on the module. PWRGD/PWRGD (Pin 1): Power Good Output Pin. This pin will toggle when VDRAIN is within VPG of VEE. This pin can be connected directly to the enable pin of a power module. When the DRAIN pin of the LT1640AL is above VEE by more than VPG, the PWRGD pin will be high impedance, allowing the pull-up current of the module’s enable pin to pull the pin high and turn the module off. When VDRAIN drops below VPG, the PWRGD pin sinks current to VEE, pulling the enable pin low and turning on the module. PI FU CTIO S TYPICAL PERFOR A CE CHARACTERISTICS |
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