s Integrates Current Limited Power Driver and Diagnostic/Monitoring Circuits in a Single IC s Works with Standard DC Brushless Fans/Motors s Supports Efficient PWM Drive .

s General Purpose Fan or Motor Speed Control s Power Supplies s Portable and Desktop Computers s Telecom Equipment, Serv.

The TC643 is a switchmode brushless DC fan/motor speed driver with diagnostic circuits. External components are kept to a minimum by integrating the power transistor on chip. Any logic-level signal can be used to drive the on-chip Power Driver. The .

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