Analog Devices Inc. LT3002 No-Opto Isolated Flyback Converter
Analog Devices Inc. LT3002 No-Opto Isolated Flyback Converter 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 optoisolator 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 LT3002 operates from an input voltage range of 4V to 36V and delivers up to 10W of isolated output power. A 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.
Features
- 4V to 36V input voltage range
- 3.6A, 65V internal DMOS power switch
- Low quiescent current
- Quasi-resonant boundary mode operation at heavy load
- Low ripple burst mode operation at light load
- Minimum load of <0.5% (typical) of full output
- No transformer third winding or optoisolator required for output voltage regulation
- Accurate EN/UVLO threshold and hysteresis
- Temperature compensation for output diode
- Output short-circuit protection
- Thermally enhanced 8-lead SO package
Applications
- Isolated automotive, industrial, and medical power supplies
- Isolated auxiliary/housekeeping power supplies
Typical Application
Related Development Tools
Analog Devices Inc. Demonstration Circuit for the LT3002
A compact no-opto isolated flyback converter that outputs 12V and maintains tight regulation.
Published: 2019-09-26
| Updated: 2024-10-14