W83627THF_06 Datasheet, PDF (127/142 Pages) Winbond – Winbond LPC I/O

W83627THF/W83627THG
2. DC Voltage Output
The W83627THF has a 4 bit DAC which produces 0 to 5 volts DC output that provides maximum 3
sets for fan speed control. The analog output can be programmed in the Bank0 Index 01h, Index 03h
and Index 11h of H/W Monitor block. The default value is 0xFY,Y is reserved nibble, that is default
output value is nearly 5V. The expression of output voltage can be represented as follow ,
Output Voltage (V) = AVCC × ^{Programmed 4 - bit Register Value}
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The application circuit is shown as follow,
This application circuit used Winbond W83391TS Pre-Driver to control Fan speed. It can support both
PWM and DC output.
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