The no-opto isolated flyback parts from Linear need no opto-coupler or LT1431 shunt regulator for regulation. They sense the isolated output voltage directly from the primary-side waveform. This simplifies the design, allows for a smaller solution size and only requires one component crossing the isolation barrier. The load, line and temp drift is less than ±5%. Several off-the-shelf transformers are shown in the data sheets making it easy to complete the design.
| Part | VIN Range | Power Switch | Max. POUT (W) | Package |
| LT8300 | 6V-100V | 0.23A/150V | 2W | SOT-23-5 |
| LT8303 | 5.5V-100V | 0.5A/150V | 5W | SOT-23-5 |
| LT8301 | 2.7V-42V | 1.2A/65V | 6W | SOT-23-5 |
| LT8302 | 2.8V-42V | 3.6A/65V | 18W | SO-8E |
| LT8304/-1 | 3V-100V | 2A/150V | 24W | SO-8E |
| LT8315 | 18V-560V | 300mA/630V | 15W | TSSOP-20 (16) |
| Part | VIN Range | Max. POUT (W) | Description | Package |
| LT3748 | 5V-100VDC | 80-100 | No-Opto Flyback Controller | MSOP-16 (12) |
| LT8309 | 4.5V-40VDC | 80-100 | Flyback Synchronous Rectifier Driver | SOT-23 |
| LT3798 | 20V-400VDC/90V-400VAC | 80-100 | No-Opto Flyback Controller with PFC | MSOP-16 |
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