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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:
Vchrdy + 0.05V < Vovch < 4.5V
•
Vovdis + 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.
Configuration Resistors
R2
R3
R5
10M
6.8M
1.2M
6.8M
2.2M
680k
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
© CAP-XX Pty Limited 2019 | Tel +61 2 9420 0690 | www.cap-xx.com
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R6
R8
R9
330k
5.6M
6.2M
150k
7.2M
3.9M
Table 4: Example resistor values for typical use
Charge management threshold voltage
Vovch
Vchrdy
2.70
2.57
4.47
4.18
controlled
LDO output voltage
Vovdis
Vhv
Vlv
2.20
1.9
1.8
3.24
2.85
1.8
Page 9 of 11
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