User manual for APPEB1012 Revision 1.2, Oct 2019
Solar Energy Harvesting Supercapacitor Evaluation Board using a
PMIC with MPPT
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high or low for the configuration pins are shown in figure 6. Refer to the datasheet of the
AEM10941 if more detail is required.
Figure 6: Configuration headers set all high (left) and all low (right) and configuration resistors
LDO output configurations
Two LDOs are available to supply loads at different operating voltages and can be enabled via the
jumpers on the evaluation board – ENLV and ENHV:
Table 1: Enabling LDO configurations
The LDO outputs, one high and one low voltage, are accessible from the LVOUT and HVOUT
headers with voltages Vlv and Vhv respectively, to supply circuits that require a stable voltage. If
enabled, LVOUT and HVOUT are enabled when the supercapacitor voltage
≥
Vchrdy and are
disabled approximately 400ms after the supercapacitor voltage drops below Vovdis.
MPPT Configuration
Table 2: Usage of MPP[1:0]
Two configuration headers, MPP[1:0] allow selection the MPP tracking ratio based on the
characteristic of the input energy harvesting source. The AEM10941 measures the open circuit
voltage of the energy harvester and sets the peak power point voltage to be the % of Voc set in
Table 2.
ENLV
ENHV
LV output
HV output
1
1
Enabled
Enabled
1
0
Enabled
Disabled
0
1
Disabled
Enabled
0
0
Disabled
Disabled
MPP [1:0]
V
mpp
/ V
oc
0
0
70%
0
1
75%
1
0
85%
1
1
90%
