User manual for APPEB1012 Revision 1.2, Oct 2019
Solar Energy Harvesting Supercapacitor Evaluation Board using a
PMIC with MPPT
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The resistors should have high values to make the additional power consumption negligible.
Moreover, the following constraints must be adhered to ensure the functionality of the chip:
•
0.05V < Vovch < 4.5V
•
0.05V < Vchrdy < Vovch - 0.05V
•
2.2V < Vovdis
•
Vhv < Vovdis - 0.3V
For example, table 4 has two sets of resistor values to customise the charge management
threshold voltages to be different from the PMIC inbuilt options.
Table 4: Example resistor values for typical use
Output mode selection
APPEB1012 has two output modes, either directly connect the output to the supercapacitor or
have the PMIC handle the output based on charge management voltage thresholds This is
accomplished by placing the jumper link on the desired section of the 3-pin header labelled
OUTPUT, illustrated in figure 8 below.
Figure 8: Output mode selection, left image – direct connection, right image – CTRL
controlled
R2
R3
R5
R6
R8
R9
Vovch
Vchrdy
Vovdis
Vhv
Vlv
10M
6.8M
1.2M
330k
5.6M
6.2M
2.70
2.57
2.20
1.9
1.8
6.8M
2.2M
680k
150k
7.2M
3.9M
4.47
4.18
3.24
2.85
1.8
LDO output voltage
Configuration Resistors
Charge management threshold voltage
