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Specifications subject to change without notice.

A_M-1W & B_LM-1W

A/1-2008

Page 2 of 2

COMMON SPECIFICATION

Item

Test Conditions

Min

Typ

Max

Units

Storage humidity

95

%

Operating temperature

-40

85

Storage temperature

-55

125

Lead temperature

15

25

Temp. rise at full load

1.5mm from case for 10 seconds

300

°C

Cooling

Free air convection

Case material

Plastic(UL94-V0)

Short circuit protection*

1

S

MTBF

3500

K hours

Weight

2.1

g

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 CHARACTERISTICS

Operating Temp.( C)

o

OUTLINE DIMENSIONS & PIN CONNECTIONS

1

24

6

5

1 24

6

1

2

4

6

5

Pin

Single

Dual

Vin

GND

0V

+Vo

NC

Vin

GND

0V

+Vo

-Vo

Note:

Unit:m m(inc h)

Pin s ection :0.50*0.30mm(0.020*0.012inch)

Pin tolerances: 0.10mm( 0.004inch)

General tolerance s: 0.25mm( 0.010inch)

RECOMMEN DED FOOTPRINT

diameter:1.00m m(0 .039inc h)

First Angle Pro jection

0.50

(0.020)

1 2

4

6

5

Single

Dual

FOOTPRINT DETAILS

APPLICATION NOTE

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 (A_M

–W2/B_LM-W2 series).

Overload Protection

Under normal operating conditions, the output

circuit of these products has no protection against

overload. The simplest method is to connect a

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

circuit breaker to the circuit.

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).

Dual Out put

Singl e Output

Vin

GND

+Vo

0V

DC

Cin

L

L

DC

L Cout

Cout

-Vo

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

recommended capacitance of its filter capacitor

sees (Table 1).

EXTERNAL CAPACITOR TABLE (Table 1)

Vin

(VDC)

Cin

(uF)

Single

Vout

(VDC)

Cout

(uF)

Dual

Vout

(VDC)

Cout

(uF)

5

4.7

5

10

±5

4.7

12

2.2

9

4.7

±9

2.2

24

1

12

2.2

±12

1

-

-

15

1

±15

0.47

It

’s not recommended to connect any external capacitor in

the application field with less than 0.5 watt output.

Output Voltage Regulation and 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).

Du al Ou t put

Si ng le O ut put

Vin

GND

0V

+Vout

DC DC

-Vout

Vin

GND

0V

+Vout

DC DC

REG

REG

REG

REG

REG

(Figure 2)

No parallel connection or plug and play.