UCC1809-1 Datasheet Economy Primary Side Controller

Manufacturer: Unitrode

Overview: Economy Primary Side Controller application INFO available UCC1809-1/-2 UCC2809-1/-2.

Datasheet Details

Part number	UCC1809-1
Manufacturer	Unitrode
File Size	909.17 KB
Description	Economy Primary Side Controller
Datasheet	UCC1809-1-Unitrode.pdf

General 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 circuits include undervoltage lockout featuring startup current less than 100µA, a user accessible voltage reference, logic to ensure latched operation, a PWM comparator, and a totem pole output stage to sink or source peak current.

The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.

Key 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.

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