LM5067EVAL National Semiconductor, LM5067EVAL Datasheet
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LM5067EVAL
Specifications of LM5067EVAL
Related parts for LM5067EVAL
LM5067EVAL Summary of contents
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... LM5067 Evaluation Board Introduction The LM5067EVAL evaluation board provides the design en- gineer with a fully functional hot swap controller board de- signed for negative voltage systems. This board contains an LM5067-2, the auto restart version of this IC. This application note describes the various functions of the board, how to test & ...
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Theory of Operation The LM5067 provides intelligent control of the power supply connections of a load which connected to a live power source. The two primary functions of a hot swap circuit are in- rush current limiting ...
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V , and can be higher or EE lower than system ground. The UVLO and OVLO thresholds are set by resistors R1-R3. The UVLO and OVLO thresholds are reached when the volt- FIGURE 3. ...
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Circuit Parameter Changes Current Limit The current limit threshold is set by R9 according to the fol- lowing equation mV/R9 LIM If the load current increases such that the voltage across R9 reaches 50 mV, the LM5067 ...
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UVLO/OVLO Input Voltage Thresholds As supplied, the input voltage UVLO thresholds on this eval- uation board are approximately 34.5V increasing, and 32.4V decreasing. The OVLO thresholds are approximately 77.7V increasing, and 75.6V decreasing. The four thresholds are determined by resistors ...
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... The companion Hot-Swap IC, the LM5067-1, latches off after a fault detection, with external control required for restart. . PGOOD is IN Restart is accomplished by momentarily taking the UVLO pin within 2.5V of VEE removing and re-applying the input voltage at VIN. Contact the nearest National Semiconductor sales office to obtain samples of the LM5067-1. 6 ...
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Performance Characteristics Horizontal Resolution: 200 ms/div Trace 2: TIMER Pin, 2V/div Trace 1: Vin, 50V/div (shown inverted 0 to -48V 2.2 µF Voltages are respect to VEE Horizontal Resolution: 0.5 ms/div Trace 4: Input Current, 2A/div Trace 2: ...
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Horizontal Resolution: 5 ms/div Trace 4: Input Current, 2A/div Trace 2: PGD Pin, 50V/div Trace 1: Vout, 20V/div Vin = -36V Voltages are respect to VEE Horizontal Resolution: 20 ms/div Trace 4: Load Current 0 to 5A, 2A/div Trace 2: ...
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Horizontal Resolution: 2sec/div Trace 2: TIMER Pin, 2V/div Trace 1 Vout, 20V/div Vin = -48V 2.2 µF Voltages are respect to VEE 30038821 FIGURE 11. Restart Timing 9 www.national.com ...
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Bill of Materials Item Description C1, C5 Ceramic Capacitor C3 Alum. Electrolytic Capacitor C8 Ceramic Capacitor C6 Unpopulated C2 Ceramic Capacitor Q1 N-Channel MOSFET R1 Resistor R2 Resistor R3 Resistor R4 Unpopulated R5 Resistor R6 Resistor R7 Resistor ...
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PC Board Layout Board Silkscreen Board Top Layer Board Bottom Layer (viewed from top) 11 30038824 30038825 30038826 www.national.com ...
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