Thermal Considerations

Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer.

Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel.

Thermal Testing Setup

Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted.

The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The height of this fan duct is constantly kept at 25.4mm (1’’).

Thermal Derating

Heat can be removed by increasing airflow over the module. The module’s maximum hot spot temperature is 125°C. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected.

FACING PWB

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

PWB

MODULE

50.8 (2.0”)

AIR FLOW

12.7 (0.5”) 25.4 (1.0”)

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

Figure 43: Wind tunnel test setup

DS_DNM04SMD10_07162008

2.8-5.5Vin, 0.75-3.3V, 10A specifications

Delta Electronics has established itself as a leading provider of power supply solutions, and its latest offering, the Delta Electronics 2.8-5.5Vin, 10A, 0.75-3.3V DC-DC converter, exemplifies the company’s commitment to high efficiency and reliability in power management. This product is particularly suitable for a wide range of applications, including industrial automation, telecommunications, and consumer electronics.

One of the standout features of this DC-DC converter is its wide input voltage range of 2.8 to 5.5 volts. This flexibility allows it to be used in various applications where voltage levels may vary, ensuring compatibility with different systems and reducing the need for additional voltage regulation components. The device is also capable of providing up to 10A of output current, which is ideal for powering high-demand electronic components.

The output voltage range of 0.75 to 3.3 volts makes this converter versatile for diverse operational requirements. Users can easily adjust the output voltage using external resistors, allowing for a customized power solution tailored to specific needs. This adjustability is critical in applications where components may have different voltage requirements, enhancing the overall efficiency of the power system.

Delta’s DC-DC converter employs advanced synchronous rectification technology which significantly improves efficiency by minimizing losses associated with power conversion. The converter achieves efficiencies that can exceed 90%, helping to minimize heat generation and improve the thermal performance of the entire system. This is particularly important in compact designs where space and heat dissipation are critical concerns.

Additionally, the Delta Electronics converter is designed with built-in protections, including overcurrent, overvoltage, and thermal shutdown features. These safety mechanisms ensure reliable operation even in demanding environments, safeguarding both the converter and the connected loads.

In terms of physical characteristics, the converter is packaged in a compact form factor, facilitating easy integration into various systems. Its low profile design enables it to fit into space-constrained applications without compromising on performance.

Overall, Delta Electronics’ 2.8-5.5Vin, 10A, 0.75-3.3V DC-DC converter is an excellent choice for designers seeking a dependable, efficient, and compact power solution for their diverse electronic applications. The combination of wide input voltage range, adjustable output, high efficiency, and robust protection features make it a standout product in the power management market.