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pulseelectronics.com

Isolation Power Transformers

Toroid Platform SMD

P766.D (02/16)

Application

PH9385NL is a series of high isolation power supply transformer drivers. Intended to operate in a fixed

duty cycle Push Pull topology, it is a part of a low cost solution for delivering lower power (up to 2.5W) from a

low voltage source. A typical implementation would be an isolated RS-485 power supply driver circuit, the design

is compatible with the MAXIM™ MAX253 IC. Other IC’s include Texas SN6501 UCC2808, Analog ADuM4070,

ADuM447x.

A schematic diagram for the Push Pull converter topology is given below.

For a fixed 50% duty cycle mode of operation, the output voltage is simply determined by the input voltage and

turns ratio. So, with the available turns ratios, a variety of output voltages can be selected. This range can be

extended by implementing different topologies such as forward or bridge and can be used with controllers offered

by different IC vendors for a number of different applications.

For More Information

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Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be

trademarks or registered trademarks of their respective owners. © Copyright, 2016. Pulse Electronics, Inc. All rights reserved.

V

V

PH9385

D2

D1

GND

CC

OUT

DRIVER

IC