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SQ60120QPA28PR2 Datasheet(PDF) 10 Page - SynQor Worldwide Headquarters |
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SQ60120QPA28PR2 Datasheet(HTML) 10 Page - SynQor Worldwide Headquarters |
10 / 12 page Product # SQ60120QPA28 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2SQ612J Rev. B 06/17/09 Page 10 Input: Output: Current: Package: 36-75 V 12 V 28 A Quarter-brick Technical Specification Output Current 40A 28A Output Voltage 12V 0V 1 ms Figure C: Output Overload protection diagram (not to scale) repeated cycles of shutdown and restart with a duty cycle of 20 ms (On) and 200 ms (Off) respectively. The BusQor module returns (auto resetting) to normal operation once the overload is removed. The BusQor is designed to survive in this mode indefinitely without damage and without human intervention. Output Short Circuit Protection : When the output of the BusQor module is shorted, a peak current of typically 40 A will flow into the short circuit for a time of about 1 ms. The output of the BusQor will shutdown to zero volts after the 1 ms have elapsed (Figure D). The shutdown period lasts for a time of 200 ms, at the end of which the BusQor module tries to power up again. If the short circuit persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 20 ms (On) and 200 ms (Off) respectively. The BusQor module returns (auto resetting) to normal operation once the short circuit is removed. The BusQor is designed to survive in this mode indefinitely without damage and without human intervention. In the Auto resetting mode, also referred to as “Hiccup” mode, the power drawn from the 48 V input is about 5 Watts, most of which is dissipated into the external fault. It is important that copper traces and pads from the output circuit be designed to withstand the short term peaks, although the average current into the fault may be as low as 50 mA typical. See Figure 17 for appropriate waveform. Output Current 40A peak Time Output Voltage <12V 0V Time 220 ms 20 ms Figure D: Output Short Circuit and Auto-Resetting protection diagram (not to scale) |
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