Q

B-XLS

Series

Series

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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.

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 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 problem might arise. It's not

recommended to connect any external capacitor in

the application field.

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).

No parallel connection or plug and play.

ISOLATION

SPECIFICATIONS

Item

Test conditions

Min

Typ

Max

Units

Isolation voltage

Tested for 1 minute and 1 mA max

1000

VDC

Isolation resistance

Test at 500VDC

1000

MΩ

OUTPUT

SPECIFICATIONS

Item

Test conditions

Min

Typ

Max

Units

Output power

0.25

W

Line regulation

For Vin change

of ±1%

(3.3V input)

±

1.5

%

(Others input)

±

1.2

Load regulation

10% to 100%

load

(3.3V output)

12

20

(5V output)

10.5

15

(9V output)

8.3

15

(12V output)

6.8

15

(15V output)

6.3

15

Output voltage

accuracy

See tolerance envelope graph

Temperature drift

100% full load

0.03

%/℃

Ripple & 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 .

Note:

1. All specifications measured at T A =25℃, humidity<75%, nominal input voltage and rated output load unless otherwise

specified.

2. See below recommended circuits for more details.

3. Dual output models unbalanced load: ±5%.

TYPICAL

CHARACTERISTICS

OUTLINE

CONNECTIONS