The document describes the features of the LT1248 power factor controller in detail, including high power factor, wide load range, international operation, and no switches.
The LT1248 provides active power factor correction for universal off‑line power systems using high‑frequency PWM current averaging. It features low line‑current distortion, over‑voltage protection, and synchronization capability, and can operate up to 300 kHz.
The document includes absolute maximum ratings, detailed electrical characteristics, typical performance graphs, pin descriptions, application notes on synchronization and over‑voltage protection, a typical 300 W preregulator circuit, and package dimensions for both PDIP and SO‑L packages.
| Maximum Operating Voltage | 25 V |
|---|---|
| Supply Current (Inactive) | 0.5 – 1.5 mA |
| Supply Current (On) | 8.5 – 12.0 mA |
| Vee Turn‑On Threshold | 15.5 – 17.5 V |
| EN/SYNC Rising Threshold | 2.2 – 2.85 V |
| Package Type (N) | 16‑Lead PDIP (Narrow 0.300) |
| Package Type (S) | 16‑Lead Plastic Small Outline (Narrow 0.150) |
The LT1248 can operate up to a maximum voltage of 25 V.
When inactive, the LT1248 draws between 0.5 mA and 1.5 mA.