STD90N02L_07 Datasheet, PDF (10/17 Pages) STMicroelectronics – N-channel 25V - 0.0052Ω - 60A - DPAK - IPAK STripFET™ III Power MOSFET

Buck converter
Table 8.
Power losses
High side switch (SW1)
P_conduction
R_DS(on) • I_L2 • δ
STD90N02L - STD90N02L-1
Low side switch (SW2)
R_DS(on) • I_L2 • (1 – δ)
P_switching
I
in
•
(Q_gsth(SW1)
+
Q_gd(SW1))
•
f
•
-
I
Zero voltage switching
P_diode
recovery
conduction
P_gate(Qg)
P_Qoss
Not applicable
Not applicable
Q_g(SW1) • V_gg • f
V_-----i-n----•_-----Q_{-----o---s---s--(--S----W----1---)---}•_-----f
2
1_{Vin • Qrr(SW2) • f}
V_f(SW2) • I_L • t_deadtime • f
Q_gls(SW2) • V_gg • f
-^V----ⁱ-ⁿ----^•-----^Q-----^o---^s---^s--⁽--^S----^W----²---⁾---^•-----^f
2
Table 9. Power losses parameters
Parameter
Meaning
d
Q_gsth
Q_gls
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
P_Qoss
Output capacitance losses
10/17