71117 Datasheet, PDF (4/11 Pages) Vishay Siliconix – SI9113 Demonstration Board

Si9113DB
Vishay Siliconix
EFFICIENCY
90.00
80.00
70.00
60.00
50.00
V_IN = 99 V
40.00
V_IN = 28 V
V_IN = 48 V
30.00
20.00
10.00
0.00
0
200
400
600
800
1000
W_O (mW)
FIGURE 7. Converter Output Load vs Efficiency – Si9113D1
90.00
80.00
V_IN = 48 V
70.00
60.00
V_IN = 28 V
50.00
40.00
V_IN = 99 V
30.00
20.00
10.00
0.00
0
200
400
600
800
1000
W_O (mW)
FIGURE 8. Converter Output Load vs Efficiency – Si9113D2
COMPENSATION
The closed loop response is observed at 48 V_IN and full load
at both outputs on the venable by applying the error across R8
and measuring the gain, phase change encountered by the
signal at both ends of R8. Refer to Figures 9 and 10 for the
actual response.
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
10
Gain
Phase
100
1,000
Frequency (Hz)
10,000
180
150
120
90
60
30
0
–30
–60
–90
–120
–150
–180
50,000
FIGURE 9. Measured Close Loop Response – Si9113D1
80
120
60
Phase ₉₀
40
60
Gain
20
30
0
0
–20
–30
–40
–60
–60
–90
–80
10
–120
100
1000
10000
Frequency (Hz)
FIGURE 10. Measured Closed Loop Response–Si9113D2
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Document Number: 71117
29-Feb-00