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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC624AEVB датащи(PDF) 15 Page - Semtech Corporation |
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SC624AEVB датащи(HTML) 15 Page - Semtech Corporation |
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15 / 23 page  SC624A 15 Over-Temperature Protection The Over-Temperature (OT) protection circuit helps prevent the device from overheating and experiencing a catastrophic failure. When the junction temperature exceeds 160°C, the device goes into thermal shutdown with all outputs disabled until the junction temperature is reduced. All register information is retained during thermal shutdown. Charge Pump Output Current Limit The device also limits the charge pump current at the VOUT pin (typically 300mA). LDO Current Limit The device limits the output currents of LDO1 and LDO2 to help prevent it from overheating and to protect the loads. Applications Information (continued) The minimum limit is 200mA, so load current greater than the rated 100mA can be used with degraded accuracy and larger dropout without tripping the current limit. LED Float Detection Float detect is a fault detection feature of the LED current sink outputs. If an output is programmed to be enabled and an open circuit fault occurs at any current sink output, that output will be disabled to prevent a sustained output OVP condition from occurring due to the resulting open loop. Float detect ensures device protection but does not ensure optimum performance. Unused LED outputs must be disabled to prevent an open circuit fault from occurring. |
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