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SMP402

7

105

100

020

40

60

80

Input Voltage (VDC)

LINE REGULATION

101

ILOAD = 200 mA

102

103

104

Load Current (mA)

LOAD REGULATION

105

100

0

100

200

300

400

500

102

VIN = 48 VDC

101

103

104

80

50

30

01

2

Load Power (W)

EFFICIENCY vs. OUTPUT POWER

40

60

70

VIN = 24 VDC

VIN = 48 VDC

VIN = 72 VDC

80

30

020

40

60

80

Input Voltage (VDC)

EFFICIENCY vs. INPUT VOLTAGE

50

40

60

70

ILOAD = 200 mA

The line and load regulation graphs were

measured on the circuit shown in Figure

6. The switching frequency of the power

supply was measured at 230 kHz.

The maximum output power curve shows

General Circuit Operation (cont.)

2.0

020

40

60

80

Input Voltage (VDC)

MAXIMUM OUTPUT POWER

0

0.5

1.0

TA = 25°C

1.5

2

0

0

100

200

300

500

Switching Frequency (kHz)

OUTPUT POWER vs. FREQUENCY

1

TA = 25°C

400

VIN = 48 VDC

Typical Performance Characteristics (Figure 6 Power Supply)

the power output capability for a 470

µH

output filter inductor (L1).

The output power versus frequency curve

was generated by characterization of the

SMP402 at various frequencies. The

curve demonstrates the trade-off between

AC and DC power losses within the

device. As AC losses rise with frequency,

DC losses and output power must be

reduced to maintain the same device

maximum power dissipation.