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FDMF5821 Datasheet(PDF) 20 Page - ON Semiconductor

Part # FDMF5821
Description  Smart Power Stage (SPS) Module with Integrated Temperature Monitor
PDF  26 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

FDMF5821 Datasheet(HTML) 20 Page - ON Semiconductor

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© 2016 Semiconductor Components Industries, LLC
www.onsemi.com
FDMF5821 • Rev. 1.0
19
Power Loss and Efficiency
Figure 38 shows an example diagram for power loss
and efficiency measurement.
Power loss calculation and equation examples:
PIN = (VIN  IIN) + (VCC  ICC)
[W]
PSW = VSW  IOUT
[W]
POUT = VOUT  IOUT
[W]
PLOSS_MODULE = PIN – PSW
[W]
PLOSS_TOTAL = PIN – POUT
[W]
EFFIMODULE = (PSW / PIN)  100
[%]
EFFITOTAL = (POUT / PIN)  100
[%]
Fairchild SPS
Evaluation Board
PVCC
VCC
VIN
VOUT
Power
Supply 1
Power
Supply 2
Pulse
Generator
PWM
Electronic
Load
VIN / IIN
VCC / ICC
VOUT / IOUT
HS
GD
LS
VSW / IOUT
Figure 38.
Power Loss and Efficiency Measurement Diagram



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