LT8302/LT8302-3
RECOMMENDED FOR NEW DESIGNS42VIN Micropower No-Opto Isolated Flyback Converter with 65V/3.6A Switch
- Part Models
- 34
- 1ku List Price
- Starting From $4.70
Overview
- 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
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.
Applications
- Isolated Automotive, Industrial, Medical Power Supplies
- Isolated Auxiliary/Housekeeping Power Supplies
Documentation
Data Sheet 1
User Guide 2
Application Note 1
Design Note 1
Technical Articles 4
Video 2
Brochure 2
Product Selector Card 1
3rd Party Solutions 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Parts | Product Life Cycle | Description |
|---|---|---|
| LT8301 | RECOMMENDED FOR NEW DESIGNS | 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch |
Tools & Simulations
LTspice 3
- LT8302 Demo Circuit - Negative to Negative Buck Converter (-18 to -42Vin, -12Vout @ 1.8A)
- LT8302 Demo Circuit - Negative to Positive Buck-Boost Converter (-4 to -42Vin to 12Vout @ 1.3A)
- LT8302 Demo Circuit - µPower No-Opto Isolated Flyback Converter (10-30V to 5V @ 2.2A)
Models for the following parts are available in LTspice:
- LT8302
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Reference Designs
Wide Input Voltage Range, Dual USB Port Charger