UC1108 Overview
The UTC UC1108 is a primary control unit for switch mode charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies.
UC1108 Key Features
- FEATURES
- 30mW No-load Input Power
- Primary side control for eliminating opto-coupler and secondary CV/CC control circuitry
- Proprietary CC tightening technique to achieve vertical CC profile
- Programmable output cable voltage drop pensation
- pensation for external ponent temperature variations
- Random frequency adjustment to reduce system EMI
- Flyback topology in DCM operation
- Built-in soft start
- Over voltage protection