Dual-output Hall-effect Switch

  Type UGN3235K Hall-effect Sensors are bipolar integrated Circuits designed for commutation of brushless dc Motors and other rotary encoding applications using multi-pole ring magnets. The device features two outputs which are independently activated by magnetic fields of opposite polarity. Each Sensor IC includes a Hall voltage generator, two Schmitt Triggers a Voltage Regulator output Transistors and on-board reverse polarity protection. The Regulator enables these devices to operate from voltages ranging between 4.5 V and 24 V. On-chip compensation circuitry stabilizes the switch points over temperature. Each open-collector output is independently operated by the proper amount and polarity of incident magnetic flux. Output 1 responds only to the positive flux from the south pole of a magnet, Output 2 to the negative flux from the north pole of a magnet. When the Sensor experiences the field of a south magnetic pole greater than the maximum operate point of Output 1, that output Switches to the LOW state and Output 2 is unaffected. When the incident flux falls below the minimum release point for Output 1, that output returns to the HIGH state and Output 2 remains unchanged. Output 2 independently responds in the same manner to the negative flux from the north magnetic pole of a magnet. Figure 1 shows a zone in the region of 0 G, tH, where both outputs are in the HIGH or OFF state. This constitutes a delay that is independent of rate of change of the incident magnetic field and ensures that both outputs are never ON simultaneously. This is an essential feature for driving brushless dc Motors with a minimum of reactive transient currents. The UGN3235K is supplied in a four-pin plastic single in-line package (SIP).
Item: 2N4355
File Size : 12 KB
Pages : 6 Pages

Other Part Numbers in this pdf file

2N4356   2N4355   2N4354  
Allegro MicroSystems, Inc.
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