This document is the introduction manual of UCC3809 series products, mainly introduces the characteristics and features of this series of products.
The document describes the UCC3809 family of BCDMOS economy low power integrated circuits designed for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies. These devices contain all necessary control and drive circuitry with minimal external parts, featuring user programmable soft start, maximum duty cycle, and an accessible 5V reference.
| Startup Current (UCCx809-1) | < 100uA |
|---|---|
| Output Stage Type | Totem Pole |
| Driver Capability | 0.4A Source/0.8A Sink |
| Maximum Duty Cycle | 70% |
| Operating Frequency Range | to 1MHz |
The startup current is less than 100uA.
Yes, the oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor.