SMP402SC POWERINT [Power Integrations, Inc.], SMP402SC Datasheet - Page 7

• Manufacturer Part Number: SMP402SC
• Description: 20-72 VDC Input Non-isolated DC Output
• Manufacturer: POWERINT [Power Integrations, Inc.]

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
Typical Performance Characteristics (Figure 6 Power Supply)
EFFICIENCY vs. OUTPUT POWER
105
104
103
102
101
100
80
70
60
50
40
30
0
0
LINE REGULATION
Input Voltage (VDC)
20
Load Power (W)
40
1
I LOAD = 200 mA
V IN = 24 VDC
V IN = 48 VDC
V IN = 72 VDC
60
80
2
the power output capability for a 470 H
output filter inductor (L1).
The output power versus frequency curve
was generated by characterization of the
SMP402 at various frequencies. The
EFFICIENCY vs. INPUT VOLTAGE
80
70
60
50
40
30
105
104
103
102
101
100
0
0
LOAD REGULATION
100
Input Voltage (VDC)
20
Load Current (mA)
200
40
I LOAD = 200 mA
300
V IN = 48 VDC
60
400
80
500
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.
OUTPUT POWER vs. FREQUENCY
2.0
1.5
1.0
0.5
0
MAXIMUM OUTPUT POWER
2
1
0
0
0
T A = 25 C
Switching Frequency (kHz)
V IN = 48 VDC
100
Input Voltage (VDC)
20
200
SMP402
40
300
1/96
60
T A = 25 C
D
400
7
500
80