L6918A STMicroelectronics, L6918A Datasheet - Page 33

• Manufacturer Part Number: L6918A
• Description: 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
• Manufacturer: STMicroelectronics

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
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.
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.
110
100
90
80
70
60
50
40
30
0
10 20 30 40 50 60 70 80 90 100 110
High-Side MOS
Low-Side MOS
Output Current [A]
90
85
80
75
70
65
60
55
0
10
20
30
40
Output Current [A]
50
60
1.470
1.450
1.430
1.410
1.390
1.370
1.350
70
0
80
10 20 30 40 50 60 70 80 90 100 110
90
100
Output Current [A]
110
L6918 L6918A
33/35