参数资料
型号: L6917D
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO28
封装: SO-28
文件页数: 14/27页
文件大小: 411K
代理商: L6917D
21/27
L6917
Efficiency
Figure 14 shows the demo board measured efficiency versus load current for different values of input voltage
and mosfet configurations.
Measures were done at Vin=5V and Vin=12V with low side mosfet composed by a single STB90NF03L (30V,
5.6m
typ @ Vgs=10V) or a couple of STB70NF03L (30V, 8m typ @ Vgs=10V) to reduce equivalent RdsON.
When 5V input is considered, the 12V bus supplies the IC and the mosfet’ drivers.
Figure 14. Efficiency
PCB and Components Layouts
Figure 15. PCB and Components Layouts
45
50
55
60
65
70
75
80
85
90
95
0
102030
4050
Output Current [A]
Efficiency
[%]
Vin = 12V; LS=STB90NF03L
Vin = 12V; LS=2xSTB70NF03L
Vin = 5V; LS=2xSTB70NF03L
Vin = 5V; LS=STB90NF03L
Componen t Side
Internal PGND Plane
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