The UCC3807 family is a programmable maximum duty cycle PWM controller designed for off-line and dc-to-dc fixed frequency current mode switching power supplies. It features high speed, low power consumption, internal full cycle soft start, and internal leading edge blanking of the current sense input.
The handbook provides a complete description of the UCC1807, UCC2807 and UCC3807 families of high‑speed, low‑power PWM controllers. It includes features, ordering information, absolute maximum ratings, electrical characteristics, pin descriptions, typical application circuits and package options.
Key sections cover the programmable maximum duty‑cycle feature, internal soft‑start, leading‑edge blanking, and detailed mechanical and thermal data for the various SOIC, TSSOP and PDIP packages.
| Oscillator Frequency | 175 kHz – 228 kHz |
|---|---|
| Maximum Duty Cycle | 75 % – 81 % (typical 78 %) |
| Supply Voltage (Ipp = 10 mA) | 13.5 V |
| Supply Current | 30 mA |
| OUT Low Level Voltage | 0.4 V – 1 V (100 mA load) |
The typical maximum duty‑cycle is 78 %, with a range from 75 % to 81 %.
The devices are rated for a supply voltage of up to 13.5 V (Ipp = 10 mA).
The OUT pin can source or sink up to 1 A of peak current.