EMC2303
The EMC2303 is an SMBus compliant fan controller with up to three 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 EMC2303 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.
Features- Three 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
- 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)
- 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
- Up to 6 selectable SMBus addresses
- SMBus Alert compatible
- CLK Pin can provide a clock source output
- Available in a 12-pin 4mm x 4mm QFN RoHS Compliant package
- Servers
- Projectors
- Industrial and Networking Equipment
- Notebook Computers
| Parameter|
Parameter Name
Value
| Value | |
comments
Multi-Fan Speed Controller
|
Multi-Fan Speed Controller
| |
# Fans Drivers
3
|
3
| |
PWM/Linear Control
PWM
|
PWM
| |
Typical Accuracy
N/A
|
N/A
| |
Max Accuracy
N/A
|
N/A
| |
Maximum Temperature Range
-40 to 125
|
-40 to 125
| |
Vcc Range (V)
3.0 to 3.6
|
3.0 to 3.6
| |
SMBus Alert
Yes
|
Yes
| |
Voltage Monitors
N/A
|
N/A
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| EMC2303-1-KP-TR | 12 | QFN | -40C to +125C | T/R | 1.24 | 1.04 | 0.94 | 0.91 | 0.90 |
Similar Devices
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| EMC2303-1-KP-TR | 0.025400 | 0.139394 | 12 | QFN | 4x4x0.9mm | Matte Tin | e3 |  |  |
