SMP402SC View Datasheet(PDF) - Power Integrations, Inc
Part Name
Description
Manufacturer
SMP402SC Datasheet PDF : 16 Pages
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General Circuit Operation (cont.)
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
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
SMP402
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.
Typical Performance Characteristics (Figure 6 Power Supply)
LINE REGULATION
105
104
103
102
101
100
0
ILOAD = 200 mA
20
40
60
80
Input Voltage (VDC)
LOAD REGULATION
105
104
103
102
101
100
0
VIN = 48 VDC
100 200 300 400 500
Load Current (mA)
MAXIMUM OUTPUT POWER
2.0
TA = 25°C
1.5
1.0
0.5
0
0
20
40
60
80
Input Voltage (VDC)
EFFICIENCY vs. OUTPUT POWER
80
VIN = 24 VDC
VIN = 48 VDC
70
VIN = 72 VDC
60
50
40
30
0
1
2
Load Power (W)
EFFICIENCY vs. INPUT VOLTAGE
80
ILOAD = 200 mA
70
60
50
40
30
0
20
40
60
80
Input Voltage (VDC)
OUTPUT POWER vs. FREQUENCY
2
TA = 25°C
VIN = 48 VDC
1
0
0
100 200 300 400 500
Switching Frequency (kHz)
7 D
1/96
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