NCP1601A Ver la hoja de datos (PDF) - ON Semiconductor
Número de pieza
componentes Descripción
Fabricante
NCP1601A Datasheet PDF : 18 Pages
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NCP1601A, NCP1601B
Appendix I – Summary of Equations in NCP1601 Boost PFC
Description
Boost converter
Critical Mode (CRM)
Vout
Vin
+
t1
)
t2
t2
Discontinuous Mode (DCM)
Vout
Vin
+
t1
)
t2
t2
³ Vout * Vin
Vout
+
t1
t1
)
t2
³ Vout * Vin
Vout
+
t1
t1
)
t2
Input current averaged by
filter capacitor
Voltage for on time Vton
Iin
+
Ipk
2
Vton + Vcontrol
Iin
+
t1
)
T
t2
Ipk
2
Vton
+
t1
T
)
t2
Vcontrol
MOSFET on−time t1
Switching period
Minimum Inductor for
CRM
t1
+
LIpk
Vin
,
or
t1
+
CrampVcontrol
Ich
³ t1 is constant for unity PFC
³ Vcontrol is constant for unity PFC
t1
)
t2
+
Vout
Vout * Vin
CrampVcontrol
Ich
,
or
t1
)
t2
+
Vout
Vout * Vin
LIpk
Vin
L
u
L(CRM)
+
Vout * Vin
Vout
Vin
Ipk
1
f
Ǹ t1
+
LIpk
Vin
,
or
t1 +
Vout * Vin
Vout
T
CrampVcontrol
Ich
³ t1 (t1 + t2) is constant for unity PFC
³ Vcontrol is constant for unity PFC
t1
)
t2
+
T
t1
CrampVcontrol
Ich
,
or
Ǹ t1 ) t2 +
Vout
Vout * Vin
T
CrampVcontrol
Ich
Same as CRM
Input impedance
Zin
+
2LIch
CrampVcontrol
Same as CRM
Input power
Pin
+
Vac2CrampVcontrol
2LIch
Same as CRM
Output power
Pout
+
hPin
+
hVac2CrampVcontrol
2LIch
Same as CRM
Maximum input power
when Vcontrol = 1 V
Pin_max
+
Vac2Cramp
2LIch
Same as CRM
Minimum ramp capacitor
when Vcontrol = 1 V
Control voltage Vcontrol
Cramp
u
Pin
Vac2
@
2LIch
Vctrl
+
2LIchPin
CrampVac2
Same as CRM
Same as CRM
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