Advance Data Sheet: Dualeta™ iQA Series – Dual Quarter Brick
thermal performance figures in the Thermal Performance section. The curves in the figures are shown for natural convection through 3 m/s (600 ft/min). The data for the natural convection condition has been collected at 0.3 m/s (60 ft/min) of airflow, which is the typical airflow generated by other heat dissipating components in many of the systems that these types of modules are used in. In the final system configurations, the airflow rate for the natural convection condition can vary due to temperature gradients from other heat dissipating components.
Heatsink Usage: For applications with demanding environmental requirements, such as higher ambient temperatures or higher power dissipation, the thermal performance of the power module can be improved by attaching a heatsink or cold plate. The iQA platform is designed with a base plate with four M3 X 0.5 through- threaded mounting fillings for attaching a heatsink or cold plate. The addition of a heatsink can reduce the airflow requirement, ensure consistent operation and extend reliability of the system. With improved thermal performance, more power can be delivered at a given environmental condition.
Standard heatsink kits are available from Innoveta Technologies for vertical module mounting in two different orientations (longitudinal – perpendicular to the direction of the pins and transverse – parallel to the direction of the pins) as shown in the heatsink Offering section. The heatsink kit contains four M3 x 0.5 steel mounting screws and a precut thermal interface pad for improved thermal resistance between the power module and the heatsink. The screws should be installed using a torque- limiting driver set between
During heatsink assembly, the
The system designer must use an accurate estimate or actual measure of the internal airflow rate and temperature when doing the heatsink thermal analysis. For each application, a review of the heatsink fin orientation should be completed to verify proper fin alignment with airflow direction to maximize the heatsink effectiveness. For Innoveta standard heatsinks, contact Innoveta Technologies for latest performance data.
Operating Information
The power modules have current limit protection to protect the module during output overload and short circuit conditions. During overload conditions, the power modules may protect themselves by entering a hiccup current limit mode. The modules will operate normally once the output current returns to the specified operating range. There is a typical delay of 100mS from the time an overload condition appears at the module output until the hiccup mode will occur.
Output
The power modules have a control circuit, independent of the primary control loop that reduces the risk of over voltage appearing at the output of the power module during a fault condition. If there is a fault in the primary regulation loop, the over voltage protection circuitry will cause the power module to enter a hiccup
Thermal Protection
When the power module exceeds the maximum operating temperature, the module may
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iQAFullDatasheet080505 2.doc 8/3/2006 | |||
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