The UCC280x-Q1 family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.
These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
The UCC280x-Q1 family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC2803-Q1 and UCC2805-Q1 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802-Q1 and UCC2804-Q1 make these ideal choices for use in off-line power supplies.
The UCC280x-Q1 series is specified for operation from –40°C to 125°C.
| Topology | Boost, Flyback, Forward |
| Control mode | Current |
| Duty cycle (max) (%) | 100 |
| Switching frequency (max) (kHz) | 1000 |
| Features | Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Soft start |
| UVLO thresholds on/off (V) | 12.5/8.3 |
| Operating temperature range (°C) | -40 to 125 |
| Rating | Automotive |
| Gate drive (typ) (A) | 1 |
| Vin (max) (V) | 12 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
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