Datasheet Analog Devices LT3837EFE#TRPBF

LT3837
Isolated No-Opto
Synchronous Flyback Controller
FEATURES DESCRIPTION Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
n Synchronous Driver for High Efficiency
n Supply Voltage Range 4.5V to 20V
n Accurate Regulation Without User Trims
n Programmable Switching Frequency from 50kHz to 250kHz
n Synchronizable
n Load Compensatio Undervoltage Lockout
n Available in a Thermally Enhanced 16-Lead
TSSOP Package The LT®3837 is an isolated switching regulator controller
designed for medium power flyback topologies. A typical
application is 10W to 60W with the part powered from a
DC supply. n The LT3837 is a current mode controller that regulates an
output voltage based on sensing the secondary voltage
via a transformer winding during flyback. This allows for
tight output regulation without the use of an optoisolator,
improving dynamic response and reliability. Synchronous
rectification increases converter efficiency and improves
output cross regulation in multiple output converters.
The LT3837 operates in forced continuous conduction …