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AH5798-WTG-7 Datasheet(PDF) 2 Page - Diodes Incorporated |
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AH5798-WTG-7 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 11 page AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER AH5798 Document number: DS32001 Rev. 2 - 2 2 of 11 www.diodes.com June 2010 © Diodes Incorporated Typical Application Circuit V dd FG O1 O2 FG SYSTEM POWER V SS SYSTEM POWER 10Kohm AH5798 Dz C1 D1 * Reverse connection of power supply may damage the device. To prevent reverse power damage, a protection (reverse blocking) Diode D1 is needed between power supply and Vdd terminal. If a reverse power protection diode D1 is used, there is no current return path to power supply, so it is necessary to follow measures such as below. - Connect Dz (Zener diode) between Vdd and Vss terminal, to prevent voltage exceeding the absolute maximum rating of the device. - Connect a capacitor C1 between Vdd and Vss terminal, to complete the current return path to power supply. The AH5798 has an open-drain tachometer FG output that follows the magnetic change frequency. Typically, a pull-up resistor of 10k Ω is recommended from FG pin to the supply voltage. Pin Descriptions Pin Name Description Vdd Power Supply Pin Vss Ground Pin O1 Output Driving & Sinking Pin 1 O2 Output Driving & Sinking Pin 2 NC No Connection FG Frequency Generator (Note 1) Notes: 1. The FG is the same as the magnetic change frequency. |
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