sc2434 Semtech Corporation, sc2434 Datasheet - Page 15

• Manufacturer Part Number: sc2434
• Description: Sc2434 Triphase Current Mode Controller With Power Good
• Manufacturer: Semtech Corporation

Typical Performance Of The Reference Desig
The reference design implemented 1.5mOhm output droop impedance as shown in Fig. 9.
The efficiency of the design is depends on the MOSFET being used and thermal management requirements of
controlling the PCB temperature and the MOSFET junction temperature. The following efficiency curve is corresponding
to 4mOhm bottom FET, while the top FET has 12 mOhm Rdson.
POWER MANAGEMENT
Applications Information (Cont.)
2005 Semtech Corp.
Fig. 10 - Typical efficiency curve for 12 mOhm top FETs and 4 Ohm bottom FETs.
95.00
90.00
85.00
80.00
75.00
70.00
65.00
Fig. 9 - Measured output drooping characteristics of the 60A design.
1.76
1.74
1.72
1.68
1.66
1.64
1.62
1.7
1.6
0
0
10
Load Line (Vin=12V, VID=00100)
10
20
20
Efficency (%)
n
I (A)
30
30
I_out(A)
15
40
40
50
50
60
60
Vo
Spec_H
Spec_L
70
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