Forward Converters Spec Wide Junction Temperature Range

June 23, 2011
Labeled high reliability (MP-grade) versions, the LT1952/-1, LTC3900, and LT4430 synchronous rectified isolated forward converters combine efficiencies up to 95% with a -55°C to 125°C operating junction temperature range.

Labeled high reliability (MP-grade) versions, the LT1952/-1, LTC3900, and LT4430 synchronous rectified isolated forward converters combine efficiencies up to 95% with a -55°C to 125°C operating junction temperature range. The LT1952/-1 is a single switch forward controller with active transformer reset that provides timing signals to the secondary-side LTC3900 synchronous rectifier driver. The LT4430 is a secondary-side opto driver with a precision reference voltage that completes regulated isolated forward converter circuits. The LTC3900 and LT4430 specify a maximum operating junction temperature of +150°C. Prices for the LT1952/-1MP in a SSOP-16 package, LTC3900MP in an SO-8 package, and LT4430MP in a TSOT-23 package are $9.35, $7, and $5.12 each/1,000, respectively. LINEAR TECHNOLOGY CORP., Milpitas, CA. (800) 454-6327.

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