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L6982 Datasheet(PDF) 38 Page - STMicroelectronics

No. de pieza L6982
Descripción Electrónicos  38 V, 2 A synchronous step-down converter with low quiescent current
PDF  48 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6982 Datasheet(HTML) 38 Page - STMicroelectronics

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Figure 45. Switching losses
It is also possible to estimate the junction temperature directly from the efficiency measurements acquired on a
stationary application condition.
Considering that the power losses are given by:
PLOSS=PIN−POUT
(49)
Neglecting the AC losses of the selected inductor, the power losses related to the L6982 are given by:
PLOSS L6982=VIN∙IIN−VOUT∙IOUT−DCRl∙IOUT2
(50)
Consequently, the junction temperature TJ can be calculated as:
TJ=TA+RtℎJA∙PLOSS, L6982
(51)
L6982
Thermal dissipation
DS13683 - Rev 1
page 38/48



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