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Part Number: MIC502
Description: The MIC502 is a thermal and fan management IC which supports the fea...
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MIC502
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DataSheet
General Description
MIC502 General Description
The MIC502 is a thermal and fan management IC which supports the features for NLX/ATX power supplies and other control applications.
Fan speed is determined by an external temperature sensor, typically a thermistor-resistor divider, and (optionally) a second signal, such as the NLX “FanC” signal. The MIC502 produces a low-frequency pulse-width modulated output for driving an external motor drive transistor. Low-frequency PWM speed control allows operation of standard brushless dc fans at low duty cycle for reduced acoustic noise and permits the use of a very small power transistor. The PWM time base is determined by an external capacitor.
An open-collector overtemperature fault output is asserted if the primary control input is driven above the normal control range.
The MIC502 features a low-power sleep mode with a user-determined threshold. Sleep mode completely turns off the fan and occurs when the system is asleep or off (both control inputs very low). A complete shutdown or reset can also be initiated by external circuitry as desired.
The MIC502 is available as 8-pin plastic DIP and SOIC packages in the –40°C to +85°C industrial temperature range.
MIC5020
PDF/DataSheet Download
- Datasheet: MIC5020
- File Size: 101809 KB
- Manufacturer: MICREL [Micrel Semiconductor]
- Click here to Download
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