Microchip EMC2301 PWM Fan Speed Controller, MSOP-8
Microchip EMC2301 PWM fan controller, 3V-3.6V, 1 output, MSOP-8. Compact, precise RPM control for servers, industrial and more.
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.
- IC Type: Fan Motor Controller
- Number of Outputs: 1
- IC Case/Package: MSOP-8
- Number of Pins: 8 pins
- Supply Voltage Range: 3V to 3.6V (VDD = 3.0V to 3.6V, TA = +27°C)
- Operating Temperature Range: -40°C to +125°C
- PWM Frequencies: 26 kHz (high-speed), 9.5Hz to 2240Hz (low-speed)
- RPM Control Accuracy: 0.5% (external crystal oscillator), 1% (from 500 RPM to 16k RPM)
- Watchdog Timer: Yes
- Fan Fault Detection: Stall and aging detection with alert
- SMBus Compatibility: SMBus Alert compatible
- Clock Output: Yes (CLK pin)
- Number of Fan Control Circuits: Up to five (for EMC2303/5 variants)
- Selectable Default Fan Speeds: Up to three (for EMC2303/5 variants)
- SMBus Addresses: Up to 6 (for EMC2303/5 variants)
- MSOP-8 package IC Type: Fan Motor Controller
- of Outputs: 1Outputs
- of Pins: 8Pins
- Supply Voltage Min: 3V
- Supply Voltage Max: 3.6V
- Operating Temperature Min: -40°C
- Operating Temperature Max: 125°C
- SVHC: No SVHC (04-Feb-2026)
- Driver Case Style: MSOP
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