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Related Posts: "Automotive"


Blog (6)

Swimming Upstream! Considerations in Automotive Upstream Point-of-Load Conversion 

by Kieran McDonald - 2015-07-08 09:31:50.0

Many automotive power supply architectures require upstream point-of-load (POL) conversion, particularly Advanced/Autonomous Driver Assistance Systems (ADAS) applications where the low core voltage of many System-On-Chips (SoC) and Digital Signal Processors (DSP) are beyond todays Switched Mode Power Supply’s (SMPS) maximum conversion ratio or main switch minimum off-time capability.  POL conversion typically involves down conversion from a primary, battery connected rail voltage to a lower secondary voltage rail required by a particular load.  Other application and load dependent attributes may be required too, such as low noise, high PSRR or high levels of load transient response.  However, adding secondary power supplies upstream of the battery connected primary converter can lead to issues.




Guaranteeing LED Lamp Output for Dark Knights 

by Andrew Niles - 2015-05-28 10:36:28.0

It was a dark and stormy night.  With an expression that matched the storm outside, a caped crusader flexed against his five point harness and tapped a gloved hand impatiently on the wheel of his customized electric vehicle while waiting for the light to change.  He was late for a special combat training session with the local police department.  If only he hadn’t taken a nap, he wouldn’t have been late.  Alfred, the knight’s friend, philosopher, confidante, and personal applications engineer, had decided not to wake him after the non-stop 72 hour spree of crime-fighting he had been dragged into earlier in the week.  

 




The Dilemmas of Free-Wheeling: Choosing a Schottky Rectifier for an Automotive Synchronous Converter 

by Kieran McDonald - 2015-04-06 14:50:44.0

For many low and medium power rails, within a given automotive system, the asynchronous buck converter remains the optimum compromise between cost and efficiency.  Implied and critical to this approach is the choice of buck diode.  Despite this, pondering the diode doesn’t pre-occupy many, yet the wrong choice can lead to low efficiency, high power dissipation and high electro-magnetic emissions (EME) or worse!

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