Setup and Verification
MB39C831-EVB-02 Thermal Energy Harvesting Evaluation Board Operation Guide, Doc. No. 002-08635 Rev. *A
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Table 4-2. Preset Output Voltage Settings of Constant Mode
S2
S1
S0
Preset Output
Voltage[V]
SW1-3
JP8
SW1-2
JP7
SW1-1
JP6
Off
Short
Off
Short
Off
Short
3.0 (Initial Setting)
Off
Short
Off
Short
On
Open
3.3
Off
Short
On
Open
Off
Short
3.6
Off
Short
On
Open
On
Open
4.1
On
Open
Off
Short
Off
Short
4.5
On
Open
Off
Short
On
Open
5.0
On
Open
On
Open
Off
Short
Forbidden
On
Open
On
Open
On
Open
Forbidden
4.2
Charge Mode (MPPT Mode)
1. Set the DIP switches and the jumper pins as shown in the Figure 4-2 (see the Table 4-3) for the initial
settings of the charge mode).
2. Connect a Li-ion battery not lower than 2.6V to CN5 (VOUT).
3. Input a DC voltage into CN1 (VDD). See the "Example for the input voltage calculation".
4. Charging is stared to the Li-ion battery. The battery is charged between 2.6V and 4V, when the battery
reaches 4V, charge is stopped.
5. To change the MPPT setting, change the switch settings (see the Table 4-4)
Example for the input voltage calculation
Release voltage of solar cell: 1[V]
MPPT setting: 50 [%]
Input voltage (VDD) [V] =1[V] / (50/100) =0.5[V]
