The PPH-1503 mainly consists of the follow
components:
AC to DC Switching power supply
DC to DC Buck converter circuit
Precision output control circuit
The block diagram below shows a function
description of each of the circuits. The following
page will show detailed decriptions of each
component.
To reduce the input voltage to 24VDC (slightly
higher than the settable voltage) the U201 Buck IC
is used in conjunction with two power MOSFETS
(Q201/Q202) and an inductor (L202).
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