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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

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.

55

60

65

70

75

80

85

90

0

10

20

304050

607080

90

100

110

Output Current [A]

30

40

50

60

70

80

90

100

110

0

1020

30405060

708090 100 110

Output Current [A]

High-Side MOS

Low-Side MOS

1.350

1.370

1.390

1.410

1.430

1.450

1.470

0

102030 4050 6070 8090 100 110

Output Current [A]