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L6918D View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
L6918D Datasheet PDF : 35 Pages
First Prev 31 32 33 34 35
L6918 L6918A
STATIC PERFORMANCES
Figure 24 shows the demo board measured efficiency versus load current in steady state conditions without air-
flow at ambient temperature.
Figure 24. System Efficiency
90
85
80
75
70
65
60
55
0 10 20 30 40 50 60 70 80 90 100 110
Output Current [A]
Figure 25 shows the mosfets temperature versus output current in steady state condition without any air-flow
or heat sink. It can be observed that the mosfets are under 100°C in any conditions. Load regulation is also re-
ported from 10A to 110A.
Figure 25. Mosfet Temperature and Load Regulation.
110
100
High-Side MOS
90
Low-Side MOS
80
70
60
50
40
30
0
10 20 30 40 50 60 70 80 90 100 110
Output Current [A]
1.470
1.450
1.430
1.410
1.390
1.370
1.350
0 10 20 30 40 50 60 70 80 90 100 110
Output Current [A]
DYNAMIC PERFORMANCES
Figure 26 shows the system response to a load transient from 0A to 110A. The output voltage is contained in
the ±50mV range. Additional output capacitors can help in reducing the initial voltage spike mainly due to the
ESR.
Figure 26. 110A Load Transient Response.
33/35

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