Microchip Technology Inc
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EMC2305

Status: In Production

Features:

  • 4-wire fan compatible
  • High speed PWM (26 kHz)
  • Low speed PWM (9.5Hz - 2240 Hz)
  • Optional detection of aging fans
  • Fan Spin Up Control and Ramp Rate Control
  • Alert on Fan Stall
  • Up to 3 Selectable Default Fan Speeds
  • Watchdog Timer
  • 0.5% accuracy from 500 RPM to 16k RPM (external crystal oscillator)
  • 1% accuracy from 500 RPM to 16k RPM (internal clock)
  • Up to 6 selectable SMBus addresses
  • SMBus Alert compatible
  • CLK Pin can provide a clock source output
  • Available in a 16-pin 4mm x 4mm QFN RoHS Compliant package
  • Servers
  • Projectors
  • Industrial and Networking Equipment
  • Notebook Computers
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The EMC2305 is an SMBus compliant fan controller with up to five independently controlled PWM fan drivers. Each fan driver is controlled by a programmable frequency PWM driver and Fan Speed Control algorithm that operates in either a closed loop fashion or as a directly PWM-controlled device.

The closed loop Fan Speed Control algorithm (FSC) has the capability to detect aging fans and alert the system. It will likewise detect stalled or locked fans and trigger an interrupt.

Additionally, the EMC2305 offers a clock output so that multiple devices may be chained and slaved to the same clock source for optimal performance in large distributed systems.

Additional Features

    Features

    • Five Programmable Fan Control circuits
      • 4-wire fan compatible
      • High speed PWM (26 kHz)
      • Low speed PWM (9.5Hz - 2240 Hz)
      • Optional detection of aging fans
      • Fan Spin Up Control and Ramp Rate Control
      • Alert on Fan Stall
      • Up to 3 Selectable Default Fan Speeds
    • Watchdog Timer
    • RPM-based fan control algorithm
      • 0.5% accuracy from 500 RPM to 16k RPM (external crystal oscillator)
      • 1% accuracy from 500 RPM to 16k RPM (internal clock)
    • SMBus 2.0 Compliant
      • Up to 6 selectable SMBus addresses
      • SMBus Alert compatible
    • CLK Pin can provide a clock source output
    • Available in a 16-pin 4mm x 4mm QFN RoHS Compliant package

     

    Applications

    • Servers
    • Projectors
    • Industrial and Networking Equipment
    • Notebook Computers
Parametrics
Name
Value
comments
Multi-Fan Speed Controller
# Fans Drivers
5
PWM/Linear Control
PWM
Typical Accuracy
N/A
Max Accuracy
N/A
Maximum Temperature Range
-40 to 125
Vcc Range (V)
3.0 to 3.6
SMBus Alert
Yes
Voltage Monitors
N/A

Documents

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Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
EMC2305 & EMC1438 Fan Ctrl and Temp Demo
EMC2305 & EMC1438 Fan Ctrl and Temp Demo ( ADM00879 )

The ADM00879 Fan Controller Demo Board provides an example of a 12V fan control application using the EMC2305 fan controller and EMC1438 temperature sensor. There are 5 fan channels, 2 on board temperature sensors and 6 remote temperature sensor inputs available.

The demo GUI has options to manually set up all the parameters for the thermal sensor and fan controller, as well as...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
EMC2305-1-AP-TR
0.041700
0.212121
16
QFN
4x4x0.9mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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