Push–pull converter

<p>A push–pull converter is a type of <a href="/facts/DC-to-DC_converter/lVlyHrjs">DC-to-DC converter</a>, a <a href="/facts/Switching_power_supply/YKcyRBtP">switching converter</a> that uses a <a href="/facts/Transformer/EYYfXWrF">transformer</a> to change the <a href="/facts/Volt/KF18MXP2">voltage</a> of a DC power supply.  The distinguishing feature of a push-pull converter is that the transformer primary is supplied with current from the input line by pairs of transistors in a symmetrical <a href="/facts/Push-pull_output/Gp8b5bcT">push-pull circuit</a>.  The transistors are alternately switched on and off, periodically reversing the current in the transformer.  Therefore, current is drawn from the line during both halves of the switching cycle.  This contrasts with <a href="/facts/Buck-boost_converter/aeYXWCvp">buck-boost converters</a>, in which the input current is supplied by a single transistor which is switched on and off, so current is drawn from the line during only a part of the switching cycle.  During the remainder of the cycle, the output power is supplied by energy stored in inductors or capacitors in the power supply.  Push–pull converters have steadier input current, create less noise on the input line, and are more efficient in higher power applications.
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Push–pull converter open-in-new

Push–pull converter