The LT8302/LT8302-3 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 3.6A, 65V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.
The LT8302/LT8302-3 operates from an input voltage range of 3V to 42V and delivers up to 18W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery.
Feature
3V to 42V Input Voltage Range
3.6A, 65V Internal DMOS Power Switch
Low Quiescent Current:
106µA in Sleep Mode
380µA in Active Mode
Quasi-Resonant Boundary Mode Operation at Heavy Load
Low Ripple Burst Mode® Operation at Light Load
Minimum Load < 0.5% (Typ) of Full Output
No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation
Accurate EN/UVLO Threshold and Hysteresis
Internal Compensation and Soft-Start
Temperature Compensation for Output Diode
Output Short-Circuit Protection
Thermally Enhanced 8-Lead SO Package
AEC-Q100 Qualified for Automotive Applications
Applications
Isolated Automotive, Industrial, Medical Power Supplies
Isolated Auxiliary/Housekeeping Power Supplies
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
