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A_S-2WR2 & B_S-2WR2

2013.06.18- A/1

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Efficiency VS Input Voltage curve

(Full Load)

50

55

60

65

70

75

80

85

90

95

100

Input Voltage(V)

B1212S-2WR2

Efficiency VS Output Load curve

(Vin=Vin-nominal)

0

10

20

30

40

50

60

70

80

90

100

10

20

30

40

50

60

70

80

90 100

Total Output Current (%)

B1212S-2WR2

DIMENSIONS, RECOMMENDED FOOTPRINT & PACKAGING

TEST CONFIGURATIONS

Input Reflected-Ripple Current Test Setup

Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.

DC

Cin

Lin

DC

Load

Oscilloscope

Current

Probe

Lin(4.7

µH)

Cin(220

µF, ESR < 1.0Ω at 100 KHz)

DESIGN CONSIDERATIONS

1) 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. 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) Overload Protection

Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is to add a circuit

breaker to the circuit.