IPC Requirements for Power Conversion Devices for the Computer and Telecommunications Industries. Find the most up-to-date version of IPC at Engineering IPC B. Requirements for Power Conversion Devices for the Computer and Telecommunications Industries. standard by Association.
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The IPC standard creates a set of consistent specifications and methods for the electronics industry. Power conversion devices PCDs are used throughout the computer and telecommunications industries, but until now there was no defined standard for these devices.
Dc output power supplies to be embedded in equipment, whether the input power is ac or dc. The 99592 of IPC is to create a set of consistent specifications and methods to assure suitability, quality, safety and reliability of PCDs for the electronics industry.
These specifications apply to suppliers of PCDs and provide guidelines for the end user to ensure adequate specs for use of these PCDs in their products.
IPC Critics Challenged to Get Involved
It sets the requirements for design, qualification testing, conformance testing, and manufacturing quality and reliability processes. Product specifications and documentation requirements should follow specific guidelines and appear in a delineated format.
The supplier must provide the user with pertinent documentation in a reasonable time frame, before the evaluation of engineering first article samples, and with appropriate nondisclosure agreement protection executed. Such documentation may include the theory of operation; applicable schematics; qualification test plan; reports for electromagnetic compatibility EMCsample qualification tests, design verification testing DVThighly accelerated life testing HALTSMT power module solder attachment reliability, and derating; reliability data and calculation; design checklist; failure mode and effect analysis FMEA for custom products; bill of materials BOM ; approved supplier list for all components; PCB artwork; component drawings, including magnetic; manufacturing drawings; regulatory reports if applicable ; change history; and mechanical dimension measurements.
The level of documentation will differ between custom and standard PCDs, as agreed by the user and the supplier; with custom PCDs typically requiring significantly greater detail ex.
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The datasheet should provide complete specifications of form, fit, and function, including electrical specifications and whether it is a Class 1, general or standard PCD, or Class 2, enhanced or dedicated service PCD. The date and revision level should be marked at the bottom of the sheets. Items to be addressed are input power logic, indicator, control, and output specifications; reliability, safety, and regulatory factors; physical dimensions and electrical specifications and requirements; and material control and labeling.
In addition, the PCD supplier needs to implement a documented, 5992 material control system for all incoming, in-process, and outgoing materials and make available documentation of a material control plan. Design for reliability means that industry best practices to specify, design, and document PCD performance and reliability are in place. Expected reliability of a PCD and the conditions under which the reliability is specified should be defined by the supplier.
Ippc should be a documented process in place to select all components for ipf designs including information on all components and all component suppliers. IPC defines the factors that should be incorporated into the component selection process.
An important part of IPC involves derating documentation requirements and setting derating guidelines. To provide a reliable power conversion product, the standard document sets forth a method of component derating to use in all electrical designs. It describes derating methods, conditions, and results. Derating is a technique used to ensure that component ratings are not exceeded, either under steady state or transient conditions.
The intent of component derating is to improve reliability of electrical components in electronic products by compensating for many variables inherent in a design.
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Proper component derating will lower failure rates through reduced stresses; reduce the impact of material, manufacturing, and operational variability; and enable continued circuit operation with long term part parameter shifts. When there is a custom PCD design on new topologies or architectures with no previous design failure modes and effects 9529 DFMEAor in cases where there are new ioc components, the supplier should provide a DFMEA to the customer with results of the analysis and of any corrective actions.
DFMEA is to be performed early in the power supply development cycle. DFMEA activities are designed with three aims: Design and qualification testing is a central and detailed focus of IPC The testing described has two main purposes.
First, design verification testing and electromagnetic susceptibility testing, including pic interference EMI and electrostatic discharge ESD testing, are intended to provide assurance that the device will function according to 95922 specification.
Second, environmental stress testing, including HALT, is intended to provide a measure of assurance not proof that the device is robust enough to operate in its intended environment without damage or degradation that would affect its operation. There was such urgency for the document that it was released as soon as the core features of it were in place, with work on a revision in progress even before the original standard was in print.
There is a need for clearer requirements with respect to moisture sensitivity and corrosion and the higher temperatures associated with lead-free manufacturing need to be addressed. The current language on HALT is not enough to give suppliers clear guidance that would ensure meeting customer requirements, so more guidance and examples will be included with respect to HALT testing. In addition, there will be an increased focus on customers in countries such as China and India.
It has come about due to a collaborative effort between major OEMs and power supply vendors. The resulting document provides a cohesive direction for best practices in design and test of power products and clearly establishes a uniform set of qualification and manufacturing test requirements.
IPC-9592 Critics Challenged to Get Involved
This has not existed prior to now and will prevent suppliers from having to perform unique sets of tests for each customer. Copies of IPC can be purchased through www.
The PCD purpose The purpose of IPC is to create a set of consistent specifications and methods to assure suitability, quality, safety and reliability of PCDs for the electronics industry.
Derating guidelines An important part of IPC involves derating documentation requirements and setting derating guidelines. Add Comment Text Only character limit.
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