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| Micropower Switches and Latches
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Micropower switches and latches are integrated Hall-effect sensor ICs designed specifically for use in battery-operated devices, providing low power consumption for longer battery life. They are typically used for on/off switches in cellular flip-phones, PDAs, and laptop computers, or for motor commutation.
During operation (awake mode), these ICs compare the actual magnetic field detected with the internally compensated thresholds and switch the output on in the presence of sufficient magnetic field. During sleep mode, the output stage is latched. Current consumption is significantly reduced by cycling the awake and sleep periods.
The IC switching behavior of the micropower switches is omnipolar, which means it can be switched on with either the North or South pole of a magnet. The IC switching behavior of the micropower latch is that it turns on in the presence of a South pole and off in the presence of a North pole. |
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