MD1320N Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Lista de partido

MD1320N

3.3V/5V Stepdown DC to DC Converter Power IC MD1320N Application Manual

Unspecified 

6 - 2 Input protection element connection

Caution

The MD1320N device has an output current drop function. In the event of power IC device malfunction resulting in

excessive input current flow, smoke and flame may be emitted from the equipment. To prevent this, install a fuse or

protective circuitry to the power IC device input line.

Install the fuse or protective circuitry to the positive side of the input line(Figure 6-2, DC input). Be sure that the fuse or

protective circuitry is not too large to effectively protect the circuitry (the input line must be capable of carrying enough

current to blow the fuse).

6 - 3 Overvoltage protection

The MD1320N power IC device does not have an overvoltage (voltage surge) protection function. If a malfunction occurs in

the device internal circuitry, there may be a voltage surge. Output will reflect this surge and damage to equipment may result.

Smoke and flame may be emitted from the equipment. To prevent this, be sure to install voltage surge sensing and

protection circuitry.

There are a number of ways to protect against voltage surge. Figure 6-B shows a typical voltage surge protection set-up. The

voltage surge sensing and protection circuit should be installed as close as possible to the load (away from the output

smoothing capacitor).

Reference part example (Figure 6-B)

Circuit protection elements (fuses, etc.)

Overvoltage protection circuit

DC

F1

power supply

DC to DC converter

D1

R1

THY1

D2

C1

R2

+

Load

-

10

Share Link: