Micro Stamped Radiator Power Supply Resistor Heat Sink

Heatsinks are vital in the power converter industry for heat dissipation in power electronic devices. AC - DC, DC - DC converters, and inverters convert electrical energy. During conversion, power components generate heat. Effective heat dissipation via heat sinks is needed for optimal performance, efficiency, and reliability.

The Stamped Heatsink Technique offers a good approach for producing high efficiency, high aspect ratio, lightweight heatsinks in small package sizes, and is a good choice for medium to high volume production. This technique also offers a low Non Recurring engineering charge, so prototype set up costs are minimal.

In recent years, due to the requirements for high power density and the increased heat generated by the devices in electronic equipment, how to cool these electronic devices has become a major challenge. A heat sink is a highly cost-effective heat ex-changer, and the optimal design of a heat sink can directly determine the device's reliability, service life, and overall performance.

A good heat-sink also makes the world of a difference for power supplies. This is because it helps your power supply to run at cooler temperatures, meaning less strain on the components, pro-longing the life of your unit. 

Thermal management: During the operation of power supply components such as transistors, diodes, and integrated circuits, electrical energy is converted and there are resistive losses. These losses result in the generation of heat. Without proper heat dissipation, the temperature of the components will rise. Excessive heat can cause the components to degrade, reduce their efficiency, and even lead to failure. The heat sink provides a large surface area for the heat to be transferred away from the components, keeping their temperature within the safe operating range.

Enhanced reliability: By effectively dissipating heat, the heat sink helps to ensure the long - term reliability and stability of the power supply. Components that are not subjected to excessive thermal stress are less likely to experience premature wear and tear or sudden breakdowns.

1. Using thermal tape or epoxy is a common method usually associated with low power devices and, while not the best thermal interface material, serves its purpose.

2.Pushpins are another common attachment method and require two small holes in the PCB. The push pin, which can be made from plastic or metal, uses the energy of a small spring to provide enough force to keep the heat sink in place.

3. Anchors and wire clips can be used as an alternative. The anchors are either soldered to the PCB using two small holes per anchor or can be installed in a routed slot in the PCB. In the case of the slot, the anchor is installed from the back side of the PCB and is held in place buy the compression force in the anchor design. The advantage of the anchors is that their location is much more flexible and can be moved out of the way of traces in the PCB.

4. A wire clip is a small diameter wire that is bent into various shapes that, when deformed, engages with the anchors and applies a force to the heat sink to hold it in place. The actual shape of the wire clips is dependent upon the location of the anchors, the heat sink design, and the amount of force required. Multiple wire clips can be used with a single heat sink in applications where a higher force is required. Wire clips are removable and allow the heat sink to be reused in the case of a reworked device.

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