Microchip EMC2301 PWM Fan Speed Controller, MSOP-8

The Microchip EMC2301 PWM Fan Speed Controller is a single-channel, RPM-based fan management solution designed for precise and reliable thermal control in a variety of electronic systems. This advanced controller drives one 4-wire fan using a programmable frequency PWM driver and a sophisticated fan speed control algorithm, supporting both closed-loop and direct PWM control modes.

The device excels in system protection and efficiency. Its closed-loop fan speed control algorithm can detect aging fans and alert the system, while also identifying stalled or locked fans and triggering an interrupt. The EMC2301 supports both high-speed PWM (26 kHz) and low-speed PWM (9.5 Hz to 2240 Hz), along with fan spin-up and ramp rate control for smooth operation. With a supply voltage range of 3V to 3.6V, this controller is ideal for low-power applications.

Additional features include a watchdog timer, RPM-based control accuracy of up to 0.5% (with an external crystal oscillator), and a clock output pin that allows multiple devices to be chained to a single clock source for optimal performance in large distributed systems. The compact MSOP-8 package makes it suitable for space-constrained designs, with an operating temperature range of -40°C to +125°C.

Key Features

• Single channel, RPM-based fan speed control (FSC)
• Closed-loop and direct PWM control modes
• Fan stall and aging detection with system alerts
• High-speed (26 kHz) and low-speed (9.5 Hz to 2240 Hz) PWM operation
• Fan spin-up control and ramp rate control
• Watchdog timer for system reliability
• 0.5% RPM accuracy (external crystal) or 1% accuracy from 500 RPM to 16k RPM
• Clock output pin for device chaining
• Supply voltage: 3V to 3.6V
• MSOP-8 package with 8 pins

The Microchip EMC2301 is a robust, high-performance fan controller that delivers precise thermal management for demanding applications.