MB39C811 Datasheet, PDF (14/36 Pages) Cypress Semiconductor – Ultra Low Power Buck PMIC Solar/Vibrations Energy Harvesting

Figure 9. Voltage doubler rectification circuit for vibration harvester
C4
10uF
PZ1
C5
10uF
AC1_1
DCGND1
DCOUT1
C3
4.7uF
AC1_2
VB
S2
S1
S0
Output voltage
select
GND
VIN
LX
VOUT
IPGOOD
OPGOOD
PGND
L1
22uH
VOUT
C2
47uF
MB39C811
Operation of the double voltage rectifier circuit rectifying an AC input voltage
When the AC1_1 input voltage is positive, the capacitor C4 charges up through the diode DD1, and when the AC1_1
input voltage is negative, the capacitor C5 charges up through the diode DD2. Each capacitor takes on a charge of
the positive peak of the AC input. The output voltage at the VIN pin is the series total of C4+C5.
Table 10. Parts list
Part number
C1
C2
Value
10μF^[1]
47μF^[1]
C3
4.7μF
C4
10μF^[1]
C5
10μF^[1]
L1
10μH to 22μH
[1]: Adjust the values according to the source supply ability and the load power.
Description
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Inductor
Document Number: 002-08401 Rev *A
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