Instruction

anual

M

DC-DC Converters PCB Mount type

nTo lower the output ripple voltage further, install an external ca-

pacitor Co at output terminal as shown below.

lZUS10/ZUW10

nSeries operation is available by connecting the outputs of two or

more power supplies as shown below. Output currents in series

connection should be lower than the lowest rated current in each

unit.

(c)

ZU/ZT-37

ZUS

ZUW

Fig.3.2 Connecting method of external capacitor at output terminal

Capacity of external capacitor at output terminal: Co [µF]

Model

ZUS1R5

ZUW1R5

100

100

100

ZUS3

ZUW3

220

100

100

ZUS6

ZUW6

220

100

100

ZUS10

ZUW10

220

100

100

3, 5

12

15

Output voltage(V)

nWhen the distance between load and DC output is long, please in-

stall capacitor at load as shown below.

Fig.3.3 Connection method of capacitor at load

4 Series Operation and

Parallel Operation

4.1 Series operation

nSeries operation is available by connecting the outputs of two or

more power supplies, as shown below. Output currents in series

connection should be lower than the lowest rated current in each

unit.

But at series operation with same output voltage, diode is not re-

quired to attach even if at (a).

lZUS1R5/ZUW1R5 ZUS3/ZUW3

ZUS6/ZUW6

Power

supply

+

-

Power

supply

+

-

D1

D2

D4

D3

(a)

When the output voltage is less than 5V.

D1 - D4: Please use Schottky Barrier Diode.

(b)

When the output voltage is more than 12V.

D1 D2: Please use Schottky Barrier Diode.

ZU1R5 ZU3 ZU6 ZU10

ZU/ZT

+VIN

-VIN

DC IN

+VIN

-VIN

DC IN

(a)

(b)

Reverse input voltage protection

Avoid the reverse polarity input voltage. It will damage the power

supply.

It is possible to protect the unit from the reverse input voltage by

installing an external diode as shown in Fig.3.4.

Fig.3.4 Reverse input voltage protection

n

October 08, 2013