MR4530 datasheet(39/43 Pages) SHINDENGEN

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Shindengen Electric MFG.CO.,LTD

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6.8 Glossary

This section provides a glossary of terms used in the MR Series Application Note, power supply reference data, and

other technical materials. It provides various definitions for technical use, such as power supply design and IC

functions.

6.8.1 Power supply operation

[Resonating capacitor]

A capacitor for a damper snubber circuit in a power supply circuit using partial resonance

→ Damper snubber

[Clamper snubber]

A snubber circuit consisting of diode, capacitor, and resistor at the primary coil end (DCR snubber) or a snubber

circuit using a power zener diode

→ Snubber circuit

[Gain and phase]

Important parameters for a feedback control circuit.

[Conducted emissions]

Conducted noise fed back to the input side; also called input feedback noise

[Output ripple voltage]

Output voltage is not completely DC and has various superimposed frequency components.

General ripple voltage components result from commercial and switching frequencies.

[Droop characteristics]

Output characteristics when an overcurrent protection function activates

[Droop compensation circuit]

A compensation circuit used to minimize the dependence of the droop function on input voltage

[Snubber circuit]

A circuit used to reduce stress on a switching device. Snubber circuits are divided into clamper snubber and

damper snubber.

[Damper snubber]

A CR snubber circuit consisting of a resistor and a capacitor between the drain and the source or between the

collector and the emitter of a main switching device. In a partial resonance power supply circuit, C represents a

resonating capacitor and R a damper resistor.

→ Snubber circuit

[Current-critical system]

A power supply control system for an isolated flyback transformer in which the main switching device activates

when the secondary diode is turned off

[Input feedback noise]

Conducted noise fed back to the input side; also called conducted emissions

[Burst mode]

Control mode for a switching power supply using intermittent oscillation

With the MR Series, the drain current peak value during intermittent oscillation is limited to IDP(burst limit).

6. Supplementary design information

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