MB39C831 Datasheet, PDF (14/40 Pages) Cypress Semiconductor – Ultra Low Voltage Boost Power Management IC for Solar/Thermal Energy Harvesting Datasheet

MB39C831
7.4 Function Description
Mode control
The mode is controlled by the MPPT_ENA pin. There are the charge mode and constant voltage mode, which also determine
the presence or absence of The MPPT, the UVLO, the VCC detecting, and the VOUT detecting functions. Set the MPPT_ENA
pin according to an application.
And also, the DC/DC converter is controlled by the ENA pin, transfer in operating state of Table10-1.
Table 7-1 Mode Control
Input
Signal
Function
Mode
Operating State
Constan
t
L
voltage
Charge H
L VOUT output stop
OFF OFF ON OFF ON OFF OFF OFF
H VOUT output enabled OFF OFF ON OFF ON OFF OFF OFF
L Charge stop
H Charge enabled
ON ON OFF ON OFF ON ON ON
ON ON OFF ON OFF ON ON ON
Changing Setting Method of Preset Output Voltage & MPPT Setting
The state is controlled by the MPPT_ENA, the ENA, the S2, S1, and S0 pins.
The preset output voltage can be set in the constant voltage mode, set the MPPT_ENA = L and the ENA =H, and then set it by
the S2, S1, and S0 pins.
The MPPT value can be set in the charge mode, set the MPPT_ENA = H and the ENA =H, and then set it by the S2, S1, and
S0 pins.
Table 7-2 Changing Preset Output Voltage in Constant Voltage Mode (MPPT_ENA = L, ENA = H)
MPPT_ENA pin
ENA pin
L
H
Input Signal
S2 pin
L
L
L
L
H
H
H
H
S1 pin
L
L
H
H
L
L
H
H
S0 pin
L
H
L
H
L
H
L
H
Control
Preset Output Voltage (V)
3.0
3.3
3.6
4.1
4.5
5.0
Setting prohibited
Setting prohibited
Document Number: 002-08404 Rev *A
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