| L6599AF | Ultra-extreme temperature range improved high voltage resonant controller | Active | Yes | 16 | 500 | SO-16 | false | Y | Internally Fixed |
| L6598 | Resonant Controller | Active | No | 14.6 | 400 | PDIP 16,SO-16 | false | N | Internally Fixed |
| L6599A | IMPROVED HIGH-VOLTAGE RESONANT CONTROLLER | Active | Yes | 16 | 500 | SO-16 | false | Y | Internally Fixed |
| L6599 | High-voltage resonant controller | NRND | Yes | 16 | 500 | SO-16 | false | Y | Internally Fixed |
| L6699 | Enhanced high-voltage resonant controller | Active | Yes smooth | 16 | 300 | SO-16 | true | Y Soft | Self Adaptative |
| STCMB1 | TM PFC with X-cap discharge and LLC resonant combo controller | Active | Yes smooth | 16 | 300 | SO-20 | true | Y Soft | Self Adaptative |
| L6599AT | IMPROVED HIGH-VOLTAGE RESONANT CONTROLLER | Active | Yes | 16 | 500 | SO-16 | false | Y | Internally Fixed |
