MR4530 datasheet(40/43 Pages) SHINDENGEN

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Shindengen Electric MFG.CO.,LTD

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[Hunting]

A situation in which the gain or phase in a feedback control system is not adequate, resulting in abnormal

oscillations

[Feedback]

Signal fed back to the primary control circuit upon detection of the output voltage

Feedback is used for constant voltage control.

[Radiated emissions]

Disturbance field strengths released into the air; also called radiated noise

[Partial resonance]

A soft-switching method or technology used in a circuit that reduces switching losses at startup of the main

switching device in a switching power supply

[Radiated noise]

Disturbance field strengths broadcast into the air; also called radiated emissions

[Ringing voltage]

In this application note, it refers in particular to the oscillation voltage immediately after the main switching

device is turned off.

6.8.2 Transformer design

[Duty ratio]

A ratio of the ON range to the oscillation period; sometimes referred to as D.

[TON-T ratio]

The same as duty ratio

[ON duty ratio]

The same as duty ratio

[Core gap]

A gap in a transformer core

In a flyback power supply, this gap is used to adjust inductance.

[Control coil]

A coil used to supply the source voltage to the internal IC of the MR Series and to output the Z/C signal.

[Magnetic saturation]

State in which the maximum magnetic flux density of a transformer is exceeded

If magnetic saturation occurs, the inductor will not function; a sudden excessive current may flow and damage

the power supply.

[Magnetic flux density]

The magnetic flux per unit area generated at the core by an excitation current

6.8.3 IC functions

【LEB】

See Leading edge blank.

6. Supplementary design information

MR4530 Datasheet(PDF) 40 Page - Shindengen Electric Mfg.Co.Ltd