e-peas AEM30940 RF Energy Harvesting User Guide
- June 5, 2024
- e-peas
Table of Contents
AEM30940 RF 2.45 GHz
Quick Start Guide EVK
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
- 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
- 6 resistors footprint related to the custom mode (CFG[2:0]=000)
- 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 x 49mm
- 4 x M2.5 Mounting holes
SUPPORT PCB
BOM around the AEM30940
Designator| Description| Quantity| Manufacturer|
Part Number
---|---|---|---|---
CBOOST| Ceramic Cap 22 /11, 10 V, 20 ?o, X5R 0603| 1| Murata|
GRM188R61A226ME15D
CBUCK| Ceramic Cap 10 1/F, 10 V, 20 %, X5R| 1| TDK| C1608X5R1A106M080AC
CHV| Ceramic Cap 10 pF, 10 V, 20 %, X5R| 1| TDK| C1608X5R1A106M080AC
CLV| Ceramic Cap 10 //F, 10 V. 20 X5R| 1| TDK| C1608X5R1A106M080AC
CSRC| Ceramic Cap 10 //F, 10 V. 20 %, X5R| 1| TDK| C1608X5R1A106M080AC
LBOOST| Power Inductor 10 pH – 0.54 A – LPD5030V| 1| Coilcraft| LPD5030V-103MR
| Power Inductor 10 /EH – 0,55 A – LPS4012| 1| Wiirth| 744 040 321 00
LBUCK| Power Inductor 10 /tH – 0,25 A| 1| TDK| ML21608M100WT
Ul| AEM30940 – Symbol QFN28 1| 1| | order at
[email protected] or Where to buy
Matching network and RF rectifier schematic under NDA signature
Footprint & Symbol: Available on the web product page
https://e-peas.com/products/energy-harvesting/rf/aem30940-3/#documentation
https://e-peas.com/products/energy- harvesting/vibration/aem30940/#documentation
- BAL option : Select “ToCn” for dual-cells supercapacitor 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)
- ZMPP resistor footprint
- 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)
parciesho
| palciesm| 0|
0
---|---|---|---
paneui| paigesm| T| 0
paiciesm| pameu3| 0| T
paneu]| paneu]| 1| T
lnchno AR| vichno Al| I AHN3| Al N3
STEP 2 : Connect the Storage Element (and the Primary Battery)
STEP 3 : Connect the Load(s) to HVOUT / LVOUT
STEP 4 : Connect the antenna to the SMA connector
• Overall efficiency from the antenna to the storage element:
STEP 5 : Check the Status
Status pins
STATUS[2]| 19| Logic output. Asserted when the AEM performs an MPP evaluation.
STATUS[1]| 20| Logic output. Asserted if the battery voltage falls below if
the AEM is taking energy from the primary battery.
STATUS[1]| 21| Logic output. Asserted when the LDOs can be enabled.
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