e-peas AEM30940 RF 2.45 GHz User Guide

June 6, 2024
e-peas

e-peas AEM30940 RF 2.45 GHz

FEATURES

Connectors

  • 1 SMA connector for input power below -10dBm [LOW]
  • 1 SMA connector for input power above -10dBm [HIGH]
  • 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

  1. 2 jumpers SELMMP[x] to define the MPPT ratio linked to the harvester technology
  2. 3 Jumpers CFG[x] to define the storage element protection levels
  3. 6 resistors footprint related to the custom mode (CFG[2:0]=000)
  4. 2 jumpers to enable/disable the internal LDOs
  5. 2 jumpers to define the primary battery minimum level
  6. 1 jumper to set the dual cell supercapacitor BAL feature
  7. 1 resistors footprint to use the ZMPP feature (constant impedance)

Size

  • 79mm x 49mm
  • 4 x M2.5 Mounting holes

SUPPORT PCB

BOM around the AEM30940e-peas-AEM30940-RF-2.45-GHz-
FIG3

Matching network and RF rectifier schematic under NDA signature Footprint & Symbol: Available on the web product page

Configuration

e-peas-AEM30940-RF-2.45-GHz-FIG4

  • MPPT ratio: SELMPP0 – SELMPP1
  • Storage Element voltages protection: CFG2 – CFG1 – CFG0e-peas-AEM30940-RF-2.45-GHz-FIG5
  • 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:
    • 100 kΩ ≤ RP ≤ 500 kΩ
    • RP) / 2.2 V
    • R9 = RP – R7
  • ZMPP resistor footprinte-peas-AEM30940-RF-2.45-GHz-FIG6
  • LDOs Outputs Voltages: ENHV (HVOUT) – ENLV (LVOUT)
  • MATCHING NETWORK + RF RECTIFIER: one matching for LOW input power (< -10 dBm) and another matching for HIGH input power (< +20 dBm)
  • Connect the Storage Element (and the Primary Battery)
  • Connect the Load(s) to HVOUT / LVOUT
  • Connect the antenna to the SMA connector
  • Overall efficiency from the antenna to the storage element:e-peas-AEM30940-RF-2.45-GHz-FIG2
  • Check the Statuse-peas-AEM30940-RF-2.45-GHz-FIG7

References

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