TI UCC2889D

非隔离6.3V ~ 9.3V

Overview

The UCC1889 controller is optimized for use as an off-line, low power, low voltage, regulated bias supply. The unique circuit topology utilized in this device can be visualized as two cascaded flyback converters, each operating in the discontinuous mode, and both driven from a single external power switch. The significant benefit of this approach is the ability to achieve voltage conversion ratios of 400V to 12V with no transformer and low internal losses.

The output voltage can be easily set to 12V or 18V. Moreover, it can be programmed for other output voltages less than 18V with a few additional components. An isolated version can be achieved with this topology as described further in Unitrode Application Note U-149.

Features

No Internal Switch(s)
Packaged with 8-SOIC (0.154, 3.90mm Width)
With 8 pins
Output Current at 100mA
Operating Supply Voltage at the range of 9V

Surface Mount Mounting Type

Applications

There are a lot of Texas Instruments
UCC2889D AC DC Converters applications.

• AC/DC Adaptors/Chargers for Cordless Phone
• AC/DC Adaptors/Chargers for PDAs
• AC/DC Adaptors/Chargers for E-books
• Adaptors for Portable Media Player
• Adaptors for DSCs
• Set-top boxes
• DVD players
• Records
• Linear Adapter Replacements
• Chargers for cell/cordless phones