EMC4002

EMC4002 SMBus Fan Driver with Temperature Monitoring PRODUCT FEATURES Description The EMC4002 is a combination fan controller device, temperature sensor, and thermal monitor. It contains two RPM based Fan Control Algorithms that monitor the fan’s speed and automatically adjust the drive to maintain the desired fan speed. These RPM based Fan Control Algorithms act independently and can be coupled to either a Dual Voltage High Side Fan driver or a PWM output. The Dual Voltage High Side fan drivers offer power savings by only drawing current from the necessary supply line based on the output voltage settings. In addition, the EMC4002 monitors up to nine (9) external diode or thermistor channels and up to seven (7) voltage channels. The EMC4002 also acts as an always on thermal monitor to signal a system wide interrupt should the CPU well temperature exceed a hardware set limit that cannot be altered via software. This ThermTrip logic uses signals from other external devices to determine overall system operation. Finally, the EMC4002 contains a programmable Low Dropout Voltage Regulator to supply 3.3V, 2.5V, or a user selected voltage. This LDO is muxed with one of the two Dual Voltage High Side Fan Drivers for flexibility. Each can source up to 600mA of current from the VDD_5V supply. Features  RPM Closed-loop Control — “Set and Forget control” — 1% control accuracy with external clock — Two 10 Bit PWMs — Two 10 bit TACHs  BC-LinkTM Communications Interface — Up to 24Mbps dat...