February 2011 Cover

FEATURES

Power Supply Design
Paralleling Capacitors
Early life failures can occur as a result of using two different capacitors. During the design of a power supply, careful consideration must be given to the equivalent series resistance and ripple current, as well as the total output capacitance. The capacitors should be as identical as possible, with the same ESR and ripple current capacity.
by Mark Woolley and Jae Choi

 

FIRST PERSON

MONEY MATTERS

 

TECH TALK

January 2011 Cover

FEATURES

Current Carrying Capacity
The Value of IPC-2152
The new standard for current carrying capacity, IPC-2152, is a technology enabler. Through the use of computer modeling and information within IPC-2152 and its appendix, current carrying capacity design guidelines can be optimized for any variation in printed circuit technology. The author, the point person for the research behind the new document, explains the conductor sizing guidelines.
by Michael R. Jouppi

 

FIRST PERSON

MONEY MATTERS

  • ROI
    New year, same challenges.
    Peter Bigelow

 

TECH TALK

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