MORNSUN reserves the copyright

Specifications subject to change without notice.

IB_LD-1W & IB_LS-1W

A/2-2008

Page 2 of 2

ISOLATION SPECIFICATIONS

APPLICATION NOTE

Item

Test condition

Min

Typ

Max

Units

Isolation voltage

Tested for 1 minute

1000

VDC

Isolation resistance

Test at 500VDC

1000

M

Ω

OUTPUT SPECIFICATIONS

Item

Test Conditions

Min

Typ

Max

Units

Output power

0.1

1

W

Line regulation

For Vin change of 5%

±0.25

Load regulation

10% to 100% load

±1

Output voltage accuracy

100% full load

±3

%

Temperature drift

100% full load

0.03

%/

°C

Ripple*

20MHz Bandwidth

10

20

Noise*

20MHz Bandwidth

50

75

mVp-p

Switching frequency

Full load, nominal input

100

KHz

*Test ripple and noise by

“parallel cable” method. See detailed operation instructions at Testing of

Power Converter section, application notes.

Note:

1. All specifications measured at TA=25

°C, humidity<75%, nominal input voltage and rated output load

unless otherwise specified.

2. See below recommended circuits for more details.

TYPICAL TEMPERATURE CURVE

Operating Temp.(

)

C

OUTLINE DIMENSION & PIN CONNECTIONS

FOOTPRINT DETAILS

1

2

4

6

Vin

GND

0V

+Vo

Pin

SIP

12

46

(0.079)

(0.200)

IB XXX XLS-1W

1

7

9

14

1

7

9

11

14

IB XXX XL D-1W

RECOMMENDED FOOTPRINT

diameter:1.00mm(0.039inch)

Note:

Unit:mm(inch)

Pin section:0.50*0.30mm(0.020*0.012inch)

Pin section tol erances: 0.10mm( 0.004inch)

General tolerances: 0.25mm( 0.010inch)

Fi rst Angle Projection

11

(0.020)

5.08

FOOTPRINT DETAILS

Vin

GND

NC

+Vo

0V

DIP

1

7

11

14

9

Pin

NC:No Connec tion

Requirement on output load

To ensure this module can operate efficiently

and reliably, During operation, the minimum

output load is not less than 10% of the full load,

and

that

this

product

should

never

be

operated under no 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 (IB_LD -W25/IB_LS-W25 series).

Recommended 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).

L

Vin

GND

+Vo

0V

DC

Cin

L

DC

Cout

(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

problem might arise. For every channel of

output, provided the safe and reliable operation

is ensured, the greatest capacitance of its filter

capacitor sees (Table 1).

EXTERNAL CAPACITOR TABLE (TABLE 1)

Vin

(VDC)

Cin

(uF)

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

It

’s not recommended to connect any external capacitor

in the application field with less than 0.5 watt output.

No parallel connection or plug and play.