The UCC2813-0/-1/-2/-3/-4/-5 family is a series of high-speed, low-power integrated circuits designed for offline and DC-to-DC fixed frequency current-mode switching power supplies. They have features such as internal soft start, internal fault soft start, and internal leading-edge blanking of the current-sense signal.
The UCC2813 and UCC3813 families are low‑power, high‑speed BiCMOS current‑mode PWM controllers for off‑line and DC‑to‑DC switching power supplies. They include internal soft‑start, fault soft‑start, leading‑edge blanking, a 1 A totem‑pole output, and a 1.5 % voltage‑reference tolerance. Various package options and temperature ranges are offered to suit battery‑operated or off‑line applications.
The datasheet provides detailed electrical specifications such as supply currents, oscillator frequencies, duty‑cycle limits, and pin functions, along with ordering information for DIL‑8, SOIC‑8, TSSOP‑8, PDIP, and other package types. Mechanical drawings and an important notice about product warranties are also included.
| Typical Starting Supply Current | 100 µA |
|---|---|
| Typical Operating Supply Current | 500 µA |
| Maximum Operating Frequency | 1 MHz |
| Voltage Reference Tolerance | 1.5 % |
| Maximum Duty Cycle (UCCx813‑0) | 100 % |
| Oscillator Frequency (UCCx813‑0) | 40‑52 kHz |
| Power Dissipation (N Package) | 1.0 W |
| Storage Temperature Range | –65 °C to +150 °C |
| Junction Temperature Range | –55 °C to +150 °C |
The typical starting supply current is 100 µA.
They can operate up to 1 MHz.
Yes, the family features built‑in full‑cycle soft‑start implemented as a clamp on the COMP voltage.