E-peas AEM20940 User manual

AEM20940
Quick Start Guide EVK
www.e-peas.com © 2020 e-peas S.A. V2.0
FEATURES
Connectors
•1 screw connector for Thermo-Electric Generator
•1 screw connector + 1 JST connector for the Storage Element
•1 screw connector for Primary Battery
•1 screw connector for HVOUT LDO output (80mA @ 1.8 –4.2 V)
•1 screw connector for LVOU LDO output (20mA @ 1.2 or 1.8 V)
Configuration
•2 jumpers SELMMP[x] to define the MPPT ratio linked to the harvester technology
•3 Jumpers CFG[x] to define the storage element protection levels
•2 jumpers to enable/disable the internal LDOs
•2 jumpers to define the primary battery minimum level
•1 jumper to set the dual cell supercapacitor BAL feature
•1 resistors footprint to use the ZMPP feature (constant impedance)
Size
•79mm x49mm
•4 x M2.5 Mounting holes
SUPPORT PCB
BOM around the AEM20940
∗𝟏Patented circuit
Footprint & Symbol: Available on the web product page
……………………………………………………………….…………………………………………………………..

STEP 1: AEM20940 Configuration
•MPPT ratio: SELMPP[0] –SELMPP[1]
•Storage Element voltages protection: CFG[2] –CFG[1] –CFG[0]
•BAL option: Select “ToCn”for dual-cells supercapcacitor and “GND” for any other
storage
•PRIM option: Connect both jumpers “NoPRIM”or remove them if a primary
battery is connected. Define the lower limit voltage on the primary battery using
R7 and R8 (2.2V by default with the jumper and 0R R7 mounted)
•100 kΩ ≤ RP ≤500 kΩ
•R7 = (𝑉𝑝𝑟𝑖𝑚_𝑚𝑖𝑛
4* RP) / 2.2 V
•R9 = RP –R7
•ZMPP resistors footprint
•LDOs Outputs Voltages: ENHV (HVOUT) –ENLV (LVOUT)
•External coldstart circuit to enable coldstart at 60mV –150 µW
STEP 2: Connect the Storage Element (and the Primary Battery)
STEP 3: Connect the Load(s) to HVOUT / LVOUT
STEP 4: Connect the Thermo-Electric Generator
•Internal Boost efficiency Vs. input voltage:
STEP 5: Check the Status
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