GENERAL DESCRIPTION

The ADPL54203 operates from an input voltage range

of 3.2V to 40V and delivers up to 17W of isolated

output power. It is a monolithic micropower isolated

flyback converter. By sampling the isolated output

voltage directly from the primary-side flyback

waveform, the part requires no third winding or optoisolator

for regulation. The output voltage is

programmed with two external resistors and a third

optional temperature compensation resistor.

Boundary mode operation provides a small magnetic

solution with excellent load regulation. Low ripple

Burst Mode operation maintains high efficiency at

light load while minimizing the output voltage ripple.

A 3.4A, 60V DMOS power switch is integrated along

with all the high voltage circuitry and control logic

into a thermally enhanced 8-lead SO package. The

high level of integration and the use of boundary and

low ripple burst modes result in a simple to use, low

component count, and high efficiency application

solution for isolated power delivery.

FEATURES

? 3.4A, 60V Internal DMOS Power Switch

? 3.2V to 40V Input Voltage Range

? No Transformer Third Winding or Opto-Isolator

Required for Output Voltage Regulation

? Quasi-Resonant Boundary Mode Operation at

Heavy Load

? Low Ripple Burst Mode? Operation at Light

Load

? Low Quiescent Current

? 115μA in Sleep Mode

? 390μA in Active Mode

? Minimum Load < 0.5 (Typ) of Full Output

? Temperature Compensation for Output Diode

? Internal Compensation and Soft-Start

? Output Short-Circuit Protection

? Accurate EN/UVLO Threshold and Hysteresis

? Thermally Enhanced 8-Lead SO Package

APPLICATIONS

? Isolated Auxiliary/Housekeeping Power Supplies

? Isolated Industrial, Medical Power Supplies