STD90N02L-1 查看數據表（PDF） - STMicroelectronics
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STD90N02L-1 Datasheet PDF : 17 Pages
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Buck converter
Table 8.
Power losses
High side switch (SW1)
Pconduction
RDS(on) • IL2 • δ
STD90N02L - STD90N02L-1
Low side switch (SW2)
RDS(on) • IL2 • (1 – δ)
Pswitching
I
in
•
(Qgsth(SW1)
+
Qgd(SW1))
•
f
•
-
I
Zero voltage switching
Pdiode
recovery
conduction
Pgate(Qg)
PQoss
Not applicable
Not applicable
Qg(SW1) • Vgg • f
V-----i-n----•-----Q-----o---s---s--(--S----W----1---)---•-----f
2
1Vin • Qrr(SW2) • f
Vf(SW2) • IL • tdeadtime • f
Qgls(SW2) • Vgg • f
-V----i-n----•-----Q-----o---s---s--(--S----W----2---)---•-----f
2
Table 9. Power losses parameters
Parameter
Meaning
d
Qgsth
Qgls
Pconduction
Pswitching
Pdiode
Pgate
Duty-cycle
Post threshold gate charge
Third quadrant gate charge
On state losses
On-off transition losses
Conduction and reverse recovery diode losses
Gate driver losses
PQoss
Output capacitance losses
10/17
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