Compact and high efficiency power factor correction unit

BPF Series

9

Bellnix

DC-DC Converter

BDD20160127

7-3 Under voltage lock out

The unit is equipped with under voltage lock out (UVLO) function preventing malfunction when input

voltage is low. When input voltage reaches the operation start voltage (75V typ), the unit starts switching

operation. If the input voltage falls to operation stop voltage (65V typ), the switching operation is stopped.

7-4 Output overvoltage protection

When the output voltage exceeds the threshold of the output overvoltage protection function, the unit

stops switching operation. However, the function does not activate if overvoltage is caused by damaged unit.

7-5 Overcurrent protection

When output current exceeds the threshold of the overcurrent protection and the overcurrent condition

occurs, the output power is limited by lowering the output voltage. When the overcurrent condition is

canceled, the output voltage will be restored automatically.

7-6 P-Good output

When the output voltage reaches 320V (typ.), terminals P-Good and SGND close after 200 ms (typ.) (low

impedance), and open (high impedance) when the output voltage reaches 260V typ.

Even if the ON/OFF control is turned OFF, the P-Good output functions when the output voltage exceeds

the threshold value.

The output is open collector output of internal photo coupler. (Applicable voltage: 30V max.)

When the P-Good output is not used, leave the PG terminal open or connect it to SGND.

VAUX

PG

SGND

10kΩ

本体内部

外側

Fig.b P-Good connection circuit example.

8. Expected life

The expected life is given in the following table.

Ambient

temperature

Average load

factor

Expected life

Below 40°C

80％

7 years

(For input voltage 100V)

Internal connection

External connection