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TC652EEVUA Datasheet(PDF) 4 Page - Microchip Technology |
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TC652EEVUA Datasheet(HTML) 4 Page - Microchip Technology |
4 / 14 page TC652/TC653 DS21453B-page 4 © 2002 Microchip Technology Inc. 2.0 PIN DESCRIPTIONS Thedescriptionsof the pins arelistedinTable2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin MSOP) Symbol Description 1VDD Power Supply Input. May be independent of fan power supply. 2FAULT Fan Fault Alert, Active-Low Output. FAULT goes low to indicate a fan FAULT condition. When FAULT occurs, the device is latched in Shutdown mode with PWM low. Toggling the SHDN pinor cyclingthe VDD will release the part and fan from shutdown. FAULT will unconditionally remain high during shutdown. 3 SHDN Fan Shutdown, Active-Low Input. During Shutdown mode the chip still monitors temperature and TOVER is low if temperature rises above factory set point. 4 GND Ground return for all TC652/TC653 functions. 5 SENSE Detect Fan Pulses Input. Pulses are detected at this pin as fan rotation chops the current through the sense resistor, RSENSE. The absence of pulses indicates a Fan Fault. 6TOVER Over-Temperature Alert, Active-Low Output. 7 GND Ground. 8 PWM PWM Fan Drive Output. Pulse width modulated rail-to-rail logic output. Nominal Frequency is 15Hz. |
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