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7 Performance Curves
Unless otherwise specified the following condition apply: T
secondary output current.
100
90
80
70
60
50
40
30
20
10
0
0.015 0.03 0.045 0.06 0.075 0.09 0.105 0.12 0.135 0.15
Output Current (A)
Output Current = I
Figure 7-1. Efficiency
10.165
Primary Output
10.164
Secondary Output
10.163
10.162
10.161
10.16
10.159
10.158
10.157
10.156
10.155
0
0.05
0.1
Secondary Output Current (A)
I
= 0 A
OUT1
Figure 7-3. Load Regulation
EN, 10V/div
0
0
Power Good
10V/div
Secondary Output
5V/div
0
Primary Output
5V/div
0
V
= 48 V
IN
Figure 7-5. Typical Start-Up Waveform
SNVU819 – NOVEMBER 2021
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48V
60V
80V
= I
OUT1
OUT2
10.2
10.1
10
9.9
9.8
9.7
9.6
9.5
9.4
9.3
9.2
0.15
0.2
0.25
V
= 48 V
IN
800µs/div
I
= I
= 100 mA
OUT
OUT2
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= 25ºC, I
= primary output current, I
A
OUT1
10.157
10.1568
10.1566
10.1564
10.1562
10.156
0
0.05
0.1
Primary Output Current (A)
I
= 0 A
OUT2
Figure 7-2. Load Regulation
0
20V/div
I
= 0 A
OUT
Figure 7-4. Typical Switching Waveform
EN, 10V/div
Power Good
10V/div
Secondary Output
5V/div
Primary Output
5V/div
2ms/div
V
= 48 V
IN
Figure 7-6. Typical Shutdown Waveform
Performance Curves
=
OUT2
10.5
Primary Output Voltage
Secondary Output Voltage
10.4
10.3
10.2
10.1
10
0.15
0.2
0.25
0.3
V
= 48 V
IN
1µs/div
V
= 48 V
IN
I
= I
= 100 mA
OUT
OUT2
LM5168FEVM EVM User's Guide
13
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