Breaking News
Design How-To

Tackling power conversion in auto electronics

Disconnect problems
NO RATINGS
< Previous Page 2 / 3 Next >
More Related Links
View Comments: Newest First | Oldest First | Threaded View
JefW
User Rank
Rookie
re: Tackling power conversion in auto electronics
JefW   11/3/2012 10:57:39 AM
NO RATINGS
You don't need an input diode for reverse battery protection. You can use a fet. This is a no-brainer if your low-battery-voltage operating-current is above half an amp or so. Sepic seems easier to keep rf-clean. You have to use a boost controller rather than buck but with modern ceramic caps it's fairly plain sailing.

cupster
User Rank
Freelancer
re: Tackling power conversion in auto electronics
cupster   10/25/2012 7:41:27 PM
NO RATINGS
You mentioned that no diodes are needed. I assume you were referring to flyback diodes since you have a synchronous output. However, automotive also has a reverse battery requirement which means adding a diode in the battery feed, unless the LT8610 has reverse voltage protection. This adds a diode drop at all voltages and means that the low end battery voltage is now 3.7Volts (assuming we can use a schottky diode). USB charging and data application require 5Volts. We really need a buck-boost supply.

Radio
NEXT UPCOMING BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Flash Poll