MR4530 datasheet(41/43 Pages) SHINDENGEN

41 / 43 page

Shindengen Electric MFG.CO.,LTD

- 71 -

[OCP]

See overcurrent protection.

[OVP]

See overvoltage protection.

[TSD]

See thermal shutdown.

[Under voltage lock out]

A function that incorporates several volts of hysteresis into startup characteristics. This function stabilizes

startup characteristics; sometimes referred to as UVLO.

[UVLO]

See Under voltage lock out.

[On-dead timer]

A function that disables the main switching device for a certain period to prevent unintended operation due to

the ringing voltage when turned off

[On-trigger]

With the MR Series, the Z/C pin (Pin 2) detects a falling edge of the control coil signal and uses it as a trigger

signal to turn on the main switching device.

[On-trigger disabled period]

In switching operations, this refers to a period during which the turn-on signal is not accepted to prevent

unintended operations due to ringing voltage when turned off.

[Overvoltage protection]

A function that limits the output voltage to prevent damage to the power supply sometimes referred to as OVP

[Overcurrent protection]

A function that limits the output current to prevent damage to the power supply; sometimes referred to as OCP

[Thermal shutdown]

A function that limits the IC junction temperature to prevent damage to the IC. If the temperature exceeds a

certain level, the IC is latched and stopped; sometimes referred to as TSD; also referred to as overheat

protection.

→ Latch stop

[Soft drive]

A drive system of the main switching device of a switching power supply that reduces noise and enhances

efficiency under a light load. Shindengen has applied for a patent on this technology.

[Negative edge]

A falling edge of a rectangular wave

[Latch stop]

One of IC’s stop modes following activation of a protection function; in this mode, the IC will not restart unless

power is applied again.

6. Supplementary design information

MR4530 Datasheet(PDF) 41 Page - Shindengen Electric Mfg.Co.Ltd