UCC3809-1 Datasheet

UCC3809-1 Economy Primary Side Controller

The UCC3809 family of BCDMOS economy low power integrated circuits contains all the control and drive circuitry required for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count. Internally implemented circuits include undervoltage lo.

Features

• User Programmable Soft Start With Active Low Shutdown
• User Programmable Maximum Duty Cycle
• Accessible 5V Reference
• Undervoltage Lockout
• Operation to 1MHz
• 0.4A Source/0.8A Sink FET Driver
• Low 100µA Startup Current PART TURN ON TURN OFF NUMBER THRESHOLD THRESHOLD UCCX809-1 10V 8V UCCX809-2 15V 8V DESCRIPTION The UCC3809 family of BCDMOS economy low power integrated circuits contains all the control and drive circuitry required for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count. Internally implemented .