Read on to discover new thermal technologies that JMC's engineering team has designed. Contact us today if you would like more information about the following projects.

Maximum Power Blower Coming Soon

JMC's engineering team is working on an extremely powerful blower that will be an ideal solution for server applications. Production samples will be available in mid-February. Click on the link to the left to view a fan curve of this new blower.

• 45 CFM
• 5000 RPM
• Maximum Static Pressure of 3 inches of water
• 2.5 Amps at 5000 RPM

Introducing JMC's Advanced 80x38mm Vane Axial Fan

The JMC 80x38 vane axial fan will produce about 110 CFM at 7000 RPM in free air and has a maximum static pressure of 0.9 inches of water. The current is approximately 1.3 amps at 7000 RPM. Production samples will be available in March 2005.

Advanced Graphics Card Low Profile Cooler

JMC introduces a new and advanced graphics cooler with the thermal features listed below. To view a full size product shot, click on the small icon to the right.

• Copper folded fin heatsink with copper base
• Approximate weight 400 g
• Designed to cool 100 watts of total thermal power on a graphics card
• Integrated high performance blower can be PWM contolled to improve acoustics
• Robust attachment to graphics card ensures reliable thermal interface with board level devices

PWM-Z Fans Stop Spinning at Low Duty Cycles

JMC introduces a new type of PWM fan design that completely eliminates fan noise. PWM-Z fans offer Computer OEMs and motherboard manufacturers the ability to completely shut off the fan at low duty cycles, as opposed to idling the PWM fan at low speed, thus completely eliminating fan noise and vibration, saving power, and extending the life of the fan.

The idle speed of a conventional PWM fan is very low but constant as shown in Figure 1 of the attached drawing. Figure 2 shows the new PWM-Z duty cycle curve that completely turns off the fan at low duty cycles. With the introduction of the PWM-Z, JMC is the first supplier to match 2 types of PWM designs specified in the microelectronics computer industry. Please reply to this newsletter for more information and to set up a meeting with our engineering staff.

PWM-Z fans are available from JMC in the following form factors:

• 60x10mm, 60x15mm, 60x20mm
• 70x15mm, 70x25mm
• 80x25mm
• 92x25mm
• 120x25mm

New Cooling Solution for Intel® P4 Socket T™ (LGA775 pin package)

JMC is proud to introduce a copper core micro-forged cooler solution that meets the Intel® P4 Socket T™ 775 pin package thermal requirements of 0.29 C/W. This active solution contains a top mounted PWM 92x25mm fan that spins at 4000 RPM. The top mounted fan is suspended above the heat sink, and the heat of the cooler is not directly transmitted to the fan therefore increasing the life of the fan. The fan assembly mounts to the heat sink assembly using standard screws, eliminating the need for gluing or clipping the fan onto the heatsink. Engineering prototypes are available upon request.

To learn more about this new cooler, contact us today.

120x38mm Fixed Vane "Digital" Micro Controller Fan

JMC launched final testing of the new 120x38mm fixed vane Micro Controller "DIGITAL" fan. Currently the 120x38mm fixed vane DC fan performs at a fixed speed of 4300 RPM's producing 200 CFM at 1.0 Inch of water. The new JMC "Digital" fan is programmable within the fan by micro-code firmware and includes a soft start algorithm that prevents high start-up spike currents without any added circuits and without any added cost. The soft start feature achieves full speed in only 5 seconds and is a vital requirement for high performance air moving devices and chassis with multiple fans. Our future plan roadmap includes adding digital PWM features to this fan size family with continually improved performance.

To learn more about this new digital fan design, contact us today.

Intel® Xeon™ Processor with 800 MHz Front Side Bus: Low Cost Thermal Solution

JMC now offers the only all Aluminum thermal solution for the Intel® Xeon™ processor. The JMC Turbo Phoenix 70 uses a very high-speed 6600 RPM fan, meets the stringent requirement of 0.29 C/W, and is priced under $14.95 USD. The Turbo Phoenix 70 is ideal for weight conscious applications, weighing only 389 grams. PWM fan speed control is available upon request.

80x38mm Fan Roadmap

Tubeaxial
• 6500 RPM, 80 CFM, 0.80 PS Inch of wg
• Available Q1 2004
  Fixed Vane
• 5800 RPM, 80 CFM, 0.75 PS Inch of wg
• Available Q1 2004
  Tubeaxial High Performance
• 8000 RPM, 100 CFM, 1.20 PS Inch of wg
• Available Q2 2004
  Fixed Vane High Performance
• 7000 RPM, 100 CFM, 1.20 PS Inch of wg
• Available 2Q 2004

Lead Free Status
The Restriction of Hazardous Substances in Electrical and Electronic Equipment (ROHS) Directive aims to protect human health and the environment through the restricted use of certain hazardous substances.

JMC is currently able to produce lead-free and cost efficient RoHS compliant fans in advance of the ROHS deadline, which is July 1, 2006. However, additional cost may be incurred. Please contact our Sales-Department for further information.

To learn more about the EU RoHS transition, CLICK HERE to download the PDF paper with Timeline.

Head Acoustics Chamber Implemented in JMC Austin Design Center
JMC is in the process of implementing a new head acoustics chamber in the Austin Design Center that will be available for acoustics testing by the 1st quarter of 2004. The new anechoic chamber provides a free-field environment for the measurement of hemispherically radiated sound waves emanating from air moving devices. With the chamber, JMC can precisely measure rating sound output and provide directivity information to customers.

Ideally suited for sound diagnosis, analysis, and design of future products, the acoustic chamber will also arm JMC with improved:

• Sound and Vibration Analysis
  
• Sound Quality
  
• Sound Design
  
• Product Development
  
• Quality Control

Low Cost Fan Speed Control with PWM-Direct Drive Design
JMC now offers customers a low cost solution to fan speed control with our new 4-wire fan that is compatible with the ADI thermal management chip. PWM-D (PWM-Direct) is a patent pending direct drive circuit where the fan signal switches the motor directly utilizing the ADI chip. This design offers the benefits of a pulse width modulated fan without the added cost. Moreover, PWM-D fans can operate at frequencies above 20KHz which is above human audible. Click here to view a demonstration of PWM-D technology

60x38mm DC Fans
JMC is developing two new designs of a high performance 60x38mm DC fan.

60x38mm 2-Stage, Fixed Vane Fan Specs:

• 8500 RPM
• 54 CFM
• 0.9 In. H20
• Samples Available Now
  
• Download Technical Drawing
  
  

  60x38mm Counter Rotating, Dual Blade Fan Specs:

• 7600 RPM
• 55 CFM
• 1.25 In. H20
• Available Q1 2004

Low Profile Active Heatsink Ideal to Cool Graphics Card

JMC has designed a low profile cooler that is particularly useful for tight spaces or space constrained designs. This is an ideal solution for cooling graphics chips as it exhibits a low profile suitable for installation in the limited space between expansion slots.

• Embedded 60x10mm DC Fan
• 4200 RPM
• 33 dBA
• 16.6 CFM in Free Air
• 0.22 A
• 0.78°C/Watt
• Custom Retention Mechanisms

Blade Geometry Tools
JMC's blade geometry tools enable our engineering team to simulate blade designs so that we can accurately predict fan performance. By relying on numerical simulation, our designers can predict the performance characteristics of new and existing fan designs, allowing systems to be optimized at a much lower cost than traditional design methods.

Blade geometry simulation will allow us to modify the geometry of the design, PQ curves, torque requirements, flow rate, rotational speed, and more, in order to design the most optimal air moving device and build samples that meet our customer's requirements.

4-Wire PWM for Cost Reduction
JMC offers customers a cost reduced 4-wire PWM fan that uses the PWM signal to directly drive a circuit to the motor coils. This results in 0 RPM when the duty cycle is below 5~8%, initial rotation when the duty cycle is more than 10%, and full speed when the duty cycle is at 100%. The frequency of the PWM signal needs to match the motor characteristics and is normally within the 30~80 HZ range.

• Reduced electronics
• Low-cost fan controller chip
• One PWM fan model will replace many models of the same custom designed speed control fan
  
  Download JMC's white paper "Application of PWM control" by clicking here.

High Performance, Dual Blade 40x50x38mm Fan
JMC's 40x50x38mm is a dual-impeller, dual-motor fan engineered with redundancy to protect against fan failure and increase the fan performance. As a result, the 40x50x38mm fan offers a 90% improvement in CFM and PQ curve in comparison to a similar size single blade fan. Samples of the 40x50x38mm will be available to customers in May.