SWS-L datasheet(13/19 Pages) TDK

13 / 19 page

・All specifications are subject to change without notice.

SWS 600L, 1000L

(a)

Example V1:5V R1:620

Ω)

(b)

(c)

Fig.2.3 Examples of connecting remote ON/OFF circuit

Output Ripple & Noise

The standard speciﬁcation for maximum ripple value is mea-

sured by measurement circuit as below. When load lines are

longer, ripple becomes larger. In this case, electrolytic capaci-

tor, ﬁlm capacitor, etc. might be necessary to use across the

load terminal. The output ripple cannot be measured accurately

if the probe ground lead of oscilloscope is too long.

Series Operation

For series operation, both method (A) and (B) are possible.

There might be a step in the output rise waveform during series

operation.

Method (A)

Method (B)

Parallel Operation

Current balancing function is provided. Both operations mode

(A) and (B) are possible.

(A) To Increase the Output Current

Correct PC to PC terminal and COM to COM terminal, the current

balancing function activates and output current of each power

supply is equivalently supplied to load. Wires to PC terminals,

COM terminals shall be as short as possible and same length

and twisted.

(1) Adjust the output voltage of each power supply to be same

value within 1% or 100mV whichever is smaller.

(2) Use same length and type of wires for all load lines.

(3) Please make sure that the sum of output current values

does not exceed a value obtained from the right side of fol-

lowing equation.

Maximum of total output current in parallel operation

≤

Rated current per unit × Number of units × 0.9

(4) Parallel operation is possible up to 5 units.

(B) To Use as a Backup Power Supply

(1) Adjust the output voltage (Vo) of each power supply to be

same value within 1% or 100mV whichever is smaller.

(2) Set power supply output voltage higher to compensate the

forward voltage drop of diode.

(3) Use within the speciﬁcations for output voltage and output

current.

(4) When one of power supplies fails, the remaining non-failure

power supplies continue to maintain the output. If one of

the power supplies stop operating, the output voltage may

TOG

CNT2

CNT1

AUX

12V

typ

150

Ω

2.2K

Ω

TOG

CNT2

CNT1

AUX

12V

typ

150

Ω

2.2K

Ω

150mm

20MHz

Oscilloscope

Coaxial Cable

1.5m

Load

0.1µ

47µ

Power

Supply

Load

Power Supply

-Vm

-S

-Vm

-S

+Vm

Load

Power Supply

-Vm

-S

-Vm

-S

+Vm

TOG

CNT2

CNT1

AUX

12V

typ

150

Ω

2.2K

Ω

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