DC2244A: ±12V @ 1A, 2.8 ~ 18V in, Buck/Boost

Demonstration circuit 2244A features the LTM®8049, a dual SEPIC or inverting µModule® regulator. The demo circuit is configured as two stand-alone DC/DC converters with +12.0V and -12V output voltages from an input voltage up to 20V. The switching frequencies of both channels are set at 1MHz on DC2244A. The frequency foldbacks when the output is 15% below the target regulation point during a fault or output overload, thus protects the power switch from damage.

Both channels can be configured as either SEPIC or inverting by simply grounding the appropriate output rail, component change, and/or PCB board cut. The maximum output current of each channel varies with the input voltage, and is 1A at 12VIN. The two channels can be paralleled for higher output current with SHARE1, SHARE2 pins tied together. See the Quick Start Procedure for more information on the modification of the board, and paralleling of two outputs.

The LTM8049 data sheet gives complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 2244A.