GAPTEC-Electronic GmbH & Co. KG

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1S7A_R – Rev. 2012-1.0

Specifications subject to change without notice.

Note:

Unit: mm[inch]

General tolerances: ±0.50mm [±0.020inch]

L=530mm [20.866inch]

Tube Quantity: 25pcs

L=220mm [8.661inch]

Tube Quantity: 10pcs

1S7A_R Series

1W Output Dual Output - Fixed Input - Isolated & Regulated

SIP PACKAGE

Tube Outline

Mechanical Dimensions

Note:

Unit: mm[inch]

Pin section tolerances: ±0.10mm [±0.004inch]

General tolerances: ±0.25mm [±0.010inch]

Application note

1) Requirement on output load

To ensure this module can operate efficiently and reliably, During opera-

tion, the minimum output load could not be less than 10% of the full

load. If the actual output power is very small, please connect a resistor

with proper resistance at the output end in parallel to increase the load,

or use our company’s products with a lower rated output power.

2) Recommended testing and application circuit

If you want to further decrease the input/output ripple, an “LC” filtering

network may be connected to the input and output ends of the DC/DC

converter, see (Figure 1).

It should also be noted that the inductance and the frequency of the

“LC” filtering network should be staggered with the DC/DC frequency to

avoid mutual interference. However, the capacitance of the output filter

capacitor must be proper. If the capacitance is too big, a startup prob-

lem might arise. For every channel of output, provided the safe and reli-

able operation is ensured, the greatest capacitance of its filter capacitor

sees (Table 1).

Vin

(VDC)

Cin

(uF)

Single Vout

(VDC)

Cout

(uF)

5

4.7

5

10

12

4.7

9

4.7

15

2.2

12

2.2

24

1

15

1

--

--

24

0.47

3) Input Over-voltage Protection Circuit

The simplest device for output voltage regulation, over-voltage and over-

current protection is a linear voltage regulator with overheat protection

that is connected to the input or output end in series (Figure 2).

4) Overload Protection

Under normal operating conditions, the output circuit of these products

has no protection against over-current. The simplest method is to con-

nect a self-recovery fuse in series at the input end or add a circuit brea-

ker to the circuit.

5) No parallel connection or plug and play

Figure 1

Figure 2