Secondary Side Controllers

Analog Devices’ synchronous secondary side controllers enable higher efficiency solutions, allowing higher power levels and smaller solutions size. Unlike prior solutions that used a signal transformer driven from the primary side to control the synchronous rectifier, our solutions sense the drain-to-source voltage of the MOSFET for activation. This technique not only eliminates a transformer, but allows the secondary side controller to work with ADI’s growing line of no-optocoupler products required for output voltage feedback boundary conduction mode (BCM)/critical conduction mode (CrCM) flyback converters, which makes it highly versatile for many types of applications.
Product Selection Table

Secondary Side Controllers

  Hold Shift Key for secondary sorting
SortOrderPart#Number of OutputsVin
(min)
(V)
Vin
(max)
(V)
Comments
1LT8311 1 3.7 30 LT8311 - Synchronous Rectifier Controller with Opto-Coupler Driver for Forward Converters
2LT8309 1 4.5 40 Secondary-Side Synchronous Rectifier Driver
3ADM1041A 1 4.5 5.5 Secondary-Side Controller with Current Share and Housekeeping
4LTC3901 1 4.5 11 For push-pull and full-bridge converters; programmable timeout, reverse inductor current sense
5LTC3900 1 4.5 11 Synchronous Rectifier Driver for Forward Converters
6LT3710 1 8 24 Secondary side synchronous post regulator. auxiliary output in isolated power supplies. use with the
7LTC1698 1 6 12.6 Secondary Synchronous rectifier controller (use LT3781 for primary side)