| Topology | Boost, Flyback, Forward |
| Duty cycle (Max) (%) | 78 |
| Vin (Max) (V) | 13.5 |
| UVLO thresholds on/off (V) | 12.5/8.3 |
| Features | Adjustable Switching Frequency, Error Amplifier, Leading Edge Blanking, Multi-topology, Programmable Max Duty Cycle, Soft Start |
| Operating temperature range (C) | -40 to 85 |
| Switching frequency (Max) (kHz) | 1000 |
| Rating | Catalog |
| Gate drive (Typ) (A) | 1 |
- User Programmable Maximum PWM Duty Cycle
- 100-A Startup Current
- Operation to 1 MHz
- Internal Full Cycle Soft Start
- Internal Leading Edge Blanking of Current Sense Signal
- 1-A Totem Pole Output
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.
