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The Pulse Width Modulator ASIC for Deep Space MissionsThe Jet Propulsion Laboratory has started the development of a Pulse Width Modulator Application Specific Integrated Circuit (PWMA). This development is leveraging the previous development of the Switch Control ASIC (SCA). The purpose of the development is to provide the control for a selected range of power converter topologies and to meet the stringent environmental requirements of deep space missions. The PWMA will include several power control functions that are not normally included on the off-the-shelf components available today. One key functional requirement is the ability to implement an N + K redundant power converter with the ability to control the charging of a battery. Other applications will be the typical point of load isolated and non-isolated power converters. The purpose the development is not only to provide a much needed flight part, but also to accelerate the engineering process by using a standard cell library from previous ASIC developments. Under previous developments with Boeing and Lockheed Martin, JPL has produced three ASICs. Each ASIC has been implemented by using an analog standard cell library. One such development was the SCA, which is design to provide a floating power switch control. The functional verification of this ASIC has been completed and the cells used have been targeted for the new development of the PWMA. The primary function of the PWMA is to provide the control function of a point of load power converter. The design is an isolated 60 W converter with a 33 V output. In architecting the design, several functions were left up to the power converter design in order to make the ASIC more generic. The ASIC can be used for several power converter topologies and power levels. Some additional features have been added to the ASIC to provide the interfaces for multi-phase topologies and battery control functions. An N+K fault tolerant strategy has been implemented in order to provide the battery control functions. The PWMA has been developed to provide an ASIC with several functions not normally available in the off the shelf controllers. These functions have been added to enable the power converter designers to achieve fault tolerant designs and battery control functions.
Document ID
20070023589
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Carr, Gregory A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wester, Gene W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lam, Barbara
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bennett, Johnny
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Franco, Lauro
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Woo, Erika
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 23, 2013
Publication Date
August 16, 2004
Subject Category
Electronics And Electrical Engineering
Meeting Information
Meeting: International Engery Conversion Engineering Conference
Location: Providence, RI
Country: United States
Start Date: August 16, 2004
End Date: August 19, 2004
Distribution Limits
Public
Copyright
Other
Keywords
Pulse Width Modulator Application Specific Integrated Circuit (PWMA)
power switches
pulse width modulator ASIC

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