The UCC3807 family of high speed, low power integrated circuits contains all of the control and drive circuitry required for off-line and dc-to-dc fixed frequency current mode switching power supplies with minimal external parts count.
These devices are similar to the UCC3800 family, but with the added feature of a user programmable maximum duty cycle. Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3807 family also features internal full cycle soft start and internal leading edge blanking of the current sense input.
The UCC3807 family offers a variety of package options, temperature range options, and choice of critical voltage levels. The family has UVLO thresholds and hysteresis levels for off-line and battery powered systems. Thresholds are shown in the table below.
| Topology | Boost, Flyback, Forward |
| Control mode | Current |
| Duty cycle (max) (%) | 78 |
| Switching frequency (max) (kHz) | 1000 |
| Features | Adjustable switching frequency, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty cycle, Soft start |
| UVLO thresholds on/off (V) | 7.2/6.9 |
| Operating temperature range (°C) | -40 to 85 |
| Rating | Catalog, Military |
| Gate drive (typ) (A) | 1 |
| Vin (max) (V) | 13.5 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
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