S-8327 Seiko, S-8327 Datasheet - Page 54

• Manufacturer Part Number: S-8327
• Description: (S-8323 / S-8327) SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko

<Remarks>
2. Ipk in inversion




FAQ No.: 11S8323009
Sample
boosting circuit:
Sample
inversion circuit:
The basic concept is as follows:
Loss Pon of VIN due to il in the figure below is:
Loss Pon of VIN due to i2 in the figure below is:
Assuming that
Iout
Iout
Ipk
Pon
Poff
Vin
Vin
=
×
=
=
=
L
M1
Vout
CONT
2
2
0
1
1
i 1
i 1
2
×
×
×
M1
L
Vout
Iout
L
=
×
×
1
Pon
fosc
CONT
fosc
i 2
×


L
×
Vin<Vout
Vss
Vout
Vss
+
0v>Vout
L
×

×
Ipk
Control
Circuit
Control
Circuit
fosc
is equal to energy Pout supplied from Vout,
2
i 2
×
Ipk
2
Vout
Vout
+
-
-
+
C
C
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