V I S H AY I N T E R T E C H N O L O G Y, I N C .
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Hybrid Capacitors / PIN Photodiodes
Technical Note
Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
By Tassilo Gernandt and Gerald Tatschl
MAL219699005E3
Fig. 1 - V-harvester board
DESCRIPTION
The V-harvester board is a photovoltaic (PV) harvesting backup demonstration circuit. It is a sophisticated stand-alone board
charged using TEMD5080X01 micro PV cells or with micro USB. The input power goes into an e-peas low power AEM10941
controller, where it is stepped up to the supercapacitor voltage of 4.2 V. Upon power demands at the interface or ENLV, ENHV
settings, the controller converts the supply voltage to the target voltages using low dropout regulators (LDO).
Storage
supercap
Interface
ENLV,
ENHV
PV cell(s)
USB
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TECHNICAL NOTE
Controller
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
These target voltages are set to 1.8 V (low voltage) and 2.5 V (high voltage) on this board by a high ohmic resistor network. The
board is equipped with a 4 F / 4.2 V 196 HVC ENYCAP™ hybrid energy storage capacitor, and has options to jumper to other
storage capacitors on the backside (or a BATT_CN = battery connector).
Fig. 2 - Jumper AEM_BATT set to 196 HVC ENYCAP™ (by default populated as 4.2 V / 4 F)
If faster charging is needed, an external PV cell can be connected (and jumpered). If no light harvesting is available, jumper A
can be set to USB.
Fig. 3 - AEM SRC set to PV1-3, or AEM SRC set to USB
Upon connection of a 5 V micro USB cable, the red LED close to the USB port turns on and the “Status 2” green LED will flash
once every ~ 5 seconds.
LIFE WORKING SIGNAL
The green Status 2 LED indicator is available to view as a periodic life signal. This indicator is active - even if AEM SRC is
jumpered to sources other than USB - to visualize operation. However, as described in the last section, only if USB is connected.
This means the power to flash this indicator is drawn from USB only and will not consume power otherwise. Status 2 is the
MPPT signal by the controller and is always active, even in very dark conditions. If the indicator does not flash periodically, then
the PV cell boost circuit was shut down by a PV input voltage below 50 mV. To reactivate it, an initial trigger of at least 400 mV
PV voltage or a kick-start by a USB input source - including jumper USB to AEM ARC - is required.
VUSB
VUSB
R10
R9
3
D4
1
GND
Q1
2
STATUS2
GND
Fig. 4 - Status 2 green LED indicator (actually flashing) + RED LED to indicate USB port power
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TECHNICAL NOTE
D5
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
MINIMAL JUMPER SETTINGS
1. Yellow jumpers “PRIM / NoPrim” for no primary cell
attached
2. Green jumper “-0.5 V” for PV setting, as described in the
next paragraph (pictured is one possibility)
3. AEM Batt setting to any of the sources (here, an upper
red jumper to the 196 HVC)
4. AEM SRC setting either to PV or USB (here, the lower red
jumper to PV1 - PV3)
5. CFG2 [CFG[2:0] left] set to zero to define the 1.8 V and
2.5 V default settings (custom voltage defined by
resistors) (black jumper)
The minimum for activating the low voltage 1.8 V output is
setting the ENLV jumper to 1 (blue jumper).
The minimum for activating the high voltage 2.5 V output is
setting the ENHV jumper to 1 (blue jumper).
The ENHV can be controlled from the SENS_CN interface
too.
PHOTOVOLTAIC HARVESTING ELEMENTS
The board is equipped by default with two PV cells, and the target input should be jumpered with the green jumper JP4 shown
above to bypass PV3.
The schematic for the configuration is:
Vishay Photodiodes
PHD
D2
D3
JP4
2
1
JP3
2
1
GND
The term “-0.5 V” refers to the possibility of subtracting 0.5 V in direct sunlight if operation with fewer PV cells than populated
is tested. The right jumper is required if two PV cells are populated.
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TECHNICAL NOTE
D1
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
PV RESPONSE OF THE TEMD5080X01
The silicon PIN photodiode is a blue enhanced version of many other Vishay PIN photodiodes of the same size. It has an
effective sensitive area of 7.7 mm2 and can deliver up to 2 mA at direct sunlight and 1.5 AM.
Axis Title
0.8
1000
1st line
2nd line
2nd line
S (λ)rel. - Relative Spectral Responsivity
10000
1.0
0.6
0.4
100
0.2
0
400
500
600
700
800
900
10
1000 1100
λ - Wavelength (nm)
Fig. 5 - Relative spectral sensitivity vs. wavelength
Measurements were carried out with a 100 W incandescent light bulb and a dimmable office LED bulb to replicate cloudy /
sunny weather.
Axis Title
Axis Title
10000
140
120
1000
80
60
100
40
20
100
1000
1st line
2nd line
100
2nd line
Forward Current (μA)
120
1st line
2nd line
2nd line
Forward Current (μA)
10000
140
80
60
100
40
20
10
0
0
0
100 200 300 400 500 600 700 800 900
0
1000
2000
3000
4000
5000
10
6000
Illuminance (lx)
Fig. 6 - 100 W incandescent light bulb
(max. 120 μA at 800 lx)
Fig. 7 - LED - 2700 K 45 mA dimmable
(max. 120 μA at 4800 lx)
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TECHNICAL NOTE
Illuminance (lx)
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
Axis Title
10000
700
500
1000
1st line
2nd line
2nd line
Forward Current (μA)
600
400
300
100
200
100
0
0
10 000
20 000
10
30 000
Illuminance (lx)
Fig. 8 - PV response at direct sunlight
VOLTAGE SETTINGS
The high ohmic voltage divider is composed of resistors, which in total do not consume more than 0.1 μA of power.
This includes the following resistors:
• RCWP040220M0FKEC - 0402 1 % thick film 20 M - industrial / high reliability
• MCT06030C1005FP500 - 0603 ± 1 % thin film 10 M, professional thin film chip resistors
The voltage divider is optimized for long lasting IoT operational life.
In the following designators:
• R1 is made of series R1 and R1b
• R2 is made of series R2 and R2b
• R6 is made of series R6 and R6b to accomplish the target values
CALCULATION OF TARGET OHMIC VALUES AND TRUE VOLTAGE OUTCOMES
CUSTOM MODE CONFIGURATION (AVAILABLE FOR: AEM10941 TO AEM30940)
STEP 1
STEP 2
Vovch 4.31 V
Vovdis (V)
2.8
Define the overdischarge level for the battery
2.8
Vchrdy (V)
2.9
Define the enable level of the LDO’s
2.9
Vovch (V)
4.29
Define the overcharge level for the battery
4.29
Vhv (V)
2.5
Define the output voltage of the HVOUT
2.5
31.1
Choose a value between 1 M and 100 M
31.1
25.0
Choose a value between 1 M and 40 M
25.0
R1 (M)
7.25
7.25
R2 (M)
3.48
3.48
R3 (M)
0.38
0.38
R4 (M)
20.0
20.0
R5 (M)
10.0
10.0
R6 (M)
15.0
15.0
|----------
RESULTS
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TECHNICAL NOTE
RT (M)
RV (M)
Technical Note
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
This table shows the ideal values in column 3 and the used values in the last column to accomplish the following voltages:
• Minimum voltage for the storage capacitor = 2.8 V
• Enable voltage level for the HV LDO = 2.9 V (HV is generated by tge LDO from the storage capacitor voltage)
• Maximum voltage for the storage capacitor = 4.29 V
• High voltage output level = 2.5 V
The results are R1 to R6, which are in total 55 M attached to the Vboost regulator output.
The LV 1.8 V output is the default (see next table).
OTHER VOLTAGE SETTINGS
Other voltages than the resistor network defined are possible with the CFG0 to CFG2 jumpers.
CONFIGURATION PINS
CFG (2) CFG (1) CFG (0)
STORAGE ELEMENT THRESHOLD VOLTAGES LODS OUTPUT VOLTAGES
Vovch
Vchrdy
Vovdis
Vhv
Vlv
TYPICAL USE
1
1
1
4.12 V
3.67 V
3.60 V
3.3 V
1.8 V
Li-on battery
1
1
0
4.12 V
4.04 V
3.60 V
3.3 V
1.8 V
Solid state battery
1
0
1
4.12 V
3.67 V
3.01 V
2.5 V
1.8 V
Li-on / NiMH battery
1
0
0
2.70 V
2.30 V
2.20 V
1.8 V
1.2 V
Single-cell supercapacitor
0
1
1
4.50 V
3.67 V
2.80 V
2.5 V
1.8 V
Dual-cell supercapacitor
0
1
0
4.50 V
3.92 V
3.60 V
3.3 V
1.8 V
Dual-cell supercapacitor
0
0
1
3.63 V
3.10 V
2.80 V
2.5 V
1.8 V
LiFePO4 battery
0
0
0
Custom mode - programmable through R1 to R6
1.8 V
The custom mode Voch means V = 4.29 V as a cut-off charge voltage, as defined in the 196 HVC ENYCAP™ datasheet. Do not
jumper CFG1 to one unless jumpered to a source other than the 196 HVC ENYCAP™ at AEM BATT!
Vchrdy means that from this voltage on, the LDOs will work on this board by resistors defined to V = 2.9 V (assuming a dropout
of the HV LDO has enough margin to power up to 80 mA at 2.5 V).
Vovdis means a discharge cutoff voltage of the controller (entering shutdown), but on this board by resistors defined to
V = 2.8 V. Assuming no LDO is being used, the 196 HVC is not to be used below this voltage level and is therefore waiting to
be reset or kick-started by a USB port charge or other source current trigger. The RESET button on the board is only required
if CFG jumpers are modified and the resistor network is modified, e.g., to open or other values. By default, resistors are present
and define and hold all voltages.
LOW VOLTAGE AND SHUT DOWN PROCEDURES
Below the ENYCAP™ voltage of 1.9 V, the device enters a deep sleep state, waiting for a current source trigger or a bright
enough light condition for the PV cell to start the controller again. This is typically at around a 400 mV PV input voltage. More
details on this can be found in the datasheet of the AEM10941 from e-peas.
INTERFACE CONNECTOR SENS_CN
The interface connector on the board was routed to the best of many possibilities, with the aim of fitting the SensorXplorerTM
boards provided by Vishay.
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TECHNICAL NOTE
There is an operation in place below the 2.8 V ENYCAP™ voltage, down to 1.9 V, for PV charging and MPPT. The operation of
this can be tracked by attaching a USB source, but keeping the AEM SRC jumper to PV1-3. Then the green Status 2 LED would
still blink (if the system came from deep sleep or zero, a PV voltage of at least 400 mV is required to start again).
Technical Note
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
1
3
5
7
9
11
13
15
SB_ST0
LVOUT
ENHV
HVOUT
SB_ST2
GND
GND
SB_ST2
HVOUT
ENHV
LVOUT
SB_ST0
2
4
6
8
10
12
14
16
HVOUT
ENHV
LVOUT
J3
SDA
SCL
GND
1
2
PA0
+5 V
3
4
6
VCC
5
PA2
VIN+
VIN+
7
8
10
PA2
9
VCC
+5 V
PA0
11
12
SCL
13
14
J1
16
SDA
15
GND
Pin 1
I2C data line
Ground
I2C clock line
5V
DIO7
3.3 V
DIO2
Sensor interrupt / ADC input (if placed)
Pin 1, pin 16 (SDA)
Pin 2, pin 15 (GND)
Pin 3, pin 14 (SCL)
Pin 4, pin 13 (+5 V)
Pin 5, pin 12 (PA0)
Pin 6, pin 11 (VCC)
Pin 7, pin 10 (PA2)
Pin 8, pin 9 (VIN+)
Possible Implementation Guide
Since most sensors from Vishay will fit voltages of 1.7 V and 2.5 V in the future, the following backwards compatibility was
chosen as a best fit (also because on most current daughter boards only the following pins are connected: GND, VCC, SCL, and
SDA). The VEML6035 low power, high sensitivity I2C ambient light sensor, for example, is a board that requires minimum
operating voltage 1.7 V only. Others require 2.5 V at a minimum.
AMBIENT LIGHT SENSORS
PACKAGE
DIMENSIONS
L x W x H (mm)
AMBIENT LIGHT
RESOLUTION (lx)
VEML3235
VEML3235SL
VEML6030
VEML6035
VEML7700
2 x 2 x 0.87
2.95 x 1.5 x 1.5
2 x 2 x 0.87
2 x 2 x 0.4
6.8 x 2.35 x 3
0.0021
0.0021
0.0036
0.0004
0.0036
VEML3235
Revision: 11-Aug-2022
VEML3235SL
OPERATING
VOLTAGE
(V)
2.6 to 3.6
2.6 to 3.6
2.5 to 3.6
1.7 to 3.6
2.5 to 3.6
VEML6030
7
OPERATING
TEMPERATURE RANGE
(°C)
-40 to +85
-40 to +85
-25 to +85
-25 to +85
-25 to +85
VEML6035
OUTPUT
CODE
AEC-Q101
QUALIFIED
16 bit, I2C
16 bit, I2C
16 bit, I2C
16 bit, I2C
16 bit, I2C
-
VEML7700
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TECHNICAL NOTE
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
Pin 7 / pin 10 is an input on the SensorXplorer mainboard (which does not interfere with providing 1.7 V here) and is not used /
connected on any sensor daughter board pin.
Pin 8 / pin 9 is an input on the SensorXplorer mainboard (which does not interfere with a logic switching ON the 2.5 V high
voltage). It can be demanded by a future sensor daughter board with a low voltage microcontroller permanently running and
switching ON its sensor component, which normally requires a higher voltage than 1.8 V upon sampling, e.g., for infrared
emitters, humidity sensors, proximity sensors, or RF transceivers.
Pin 4 / pin 13 is a 5 V input line to some sensor daughter boards and does not interfere with providing a periodic Status 2 signal.
For future implementations, this is a periodic life or trigger signal (once every 2 s to 3 s) from the V-harvester board. Then a
running RTC on a future daughter board is not required to wake up periodically. Instead, the Status 2 port trigger wake-up can
be used.
Pin 6 / pin 11 are the main 2.5 V output (similar to the main VCC = 3.3 V on the daughter boards), which can be enabled manually
from the V-Harvester board.
SIZE OF A MINIMAL IMPLEMENTATION
The total minimal size of an IoT sensor can be built with a base circuit around the controller chip totaling 12 mm x 12 mm =
~ 150 mm2. It is recommended to use at least two PV cells with 2 x 5 mm x 4 mm = 40 mm2. The 196 HVC ENYCAP™ has outer
dimensions of 7.5 mm x 7.5 mm = ~ 60 mm2.
With 10 % margin and spacing around, the total size of a circuit can be as small as 250 mm2 x 1.1 = 275 mm2.
The implementation would then have 13.8 Ws of storage energy and could harvest 2 mW average in direct sunlight. Output
power can be as a high as 2.5 V at 80 mA = 200 mW peak pulse power, and 25 mA as the maximum continuous current
presented by the 196 HVC ENYCAP™ 4 F, 4.2 V capacitor.
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TECHNICAL NOTE
Fig. 9 - Visualization of component sizes
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
MEASUREMENT
With a PV cell as the input power - but with several tracking, maximizing effects (e.g. MPPT), and monitoring tasks triggered
periodically and sometimes at the same time - input and output power are dynamic. Therefore, it is difficult to calculate
efficiencies at a specific point in time.
The follow measurements were done with an external PV input.
Case 1: Equilibrium
3 x PV (3 x 0.4 V); the only equilibrium setup found (1)
INPUT
V
1.27 V
A
1.43 mA
Pin
1.82 mW
OUTPUT
V
1.82 V
A
0.58 mA
Pout
1.05 mW
Efficiency
Voltage at ENYCAP™ 2 mm x 8 mm x 11 mm
57.7 %
(2)
3.46 V
Notes
(1) Equilibrium state means a stable condition with a constant ENYCAP™ voltage
(2) This ENYCAP™ is under development, but was chosen because its capacitance of 0.2 F shows whether the voltage is rising or decaying
much better
The following three measurements (case 2 to 4) include an ENYCAP™ voltage rising or falling, and therefore the input / output
is added / subtracted to / from the energy balance and calculation.
Case 2
Voltage at supercapacitor used as additional input; 1 x PV cell
INPUT
V
0.27 V
Similar to 1 x PV cell
A
2.16 mA
(Like direct sunlight)
Pin
0.58 mW
OUTPUT
1.82 V
A
0.58 mA
Pout
1.05 mW
Add input power
Voltage at supercapacitor falling
3.1 V
At T0
3.07 V
After 10 s
3.03 V
Equals current input 2 (current from ENYCAP™)
0.68 mA
Equals pin 2 (power from ENYCAP™)
2.09 mW
Efficiency
39.3 %
Voltage at ENYCAP™ 2 mm x 8 mm x 11 mm
3.07 V
Revision: 11-Aug-2022
9
After 20 s
With Q = I x t = C x U
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
Case 3
Voltage at supercapacitor used as additional input (power); like 2 x PV cell
INPUT
V
0.73 V
A
0.58 mA
Pin
0.42 mW
Similar to 2 x PV cell
OUTPUT
V
1.82 V
A
0.58 mA
Pout
1.05 mW
Add input power
3.52 V
At T0
3.49 V
After 10 s
3.46 V
After 20 s
Equals current input 2 (current from ENYCAP™)
0.6 mA
With Q = I x t = C x U
Equals pin 2 (power from ENYCAP™)
2.1 mW
Efficiency
41.7 %
Voltage at ENYCAP™ 2 mm x 8 mm x 11 mm
3.49 V
Voltage at supercapacitor falling
Case 4
Voltage at supercapacitor used as additional output (output means power is used to charge the supercapacitor).
INPUT
V
0.423 V
A
5.7 mA
Pin
1 x stronger PV cell
2.41 mW
OUTPUT
V
1.82 V
A
0.58 mA
Pout
1.05 mW
Add input power
3.0 V
At T0
3.01 V
After 10 s
3.02 V
After 20 s
Voltage at supercapacitor rising
-0.23 mA
Equals pin 2 (power from ENYCAP™)
-0.69 mW
Efficiency
61.0 %
Voltage at ENYCAP™ 2 mm x 8 mm x 11 mm
3.01 V
With Q = I x t = C x U
The conversion efficiency is always calculated as the ratio: input PV to LDO output 1.7 V.
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TECHNICAL NOTE
Equals current input 2 (current from ENYCAP™)
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Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
BILL OF MATERIAL
QUANTITY
1
4
1
1
1
1
1
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
DESIGNATOR
B1
B2, B3, B4, B5
LBUCK
C1
C2
C3
C4
CBOOST
CSRC
CBATT, CSRC2
CBUCK, CHV, CLV
D1
D4
D5
D6
LBOOST
P1
Q1
R1
R1b
R2
R2_b
R3
1
R4
R5
R17
1
2
1
1
1
2
2
2
2
2
2
3
3
4
1
1
3
R19
R20, R21
R24
R25
R26
R6, R6b
R9, R10
R11, R13
R12, R14
R15, R16
R22, R23
HVOUT, LVOUT, PRIM
JP0, JP1, JP2
JP3, JP4, JP6, JP7
SW1, SW2, SW3, SW4,
SW5, SW6, SW7
BATT_CN
ext_PV
PV1, PV2, PV3
4
T1, T2, T3, T4
1
1
1
1
2
2
SENS_CN
U1
SW8
USB_CN
FB1, FB2
J1, J2
7
Revision: 11-Aug-2022
VISHAY P/N
MAL219691113E3
Not populated
ILSB0603ER100K
VJ0402V104ZXQPW1BC
VL0402H102JxAPxxx
BAS16D-E3
alternative: VLMS1500-GS08
alternative: VLMG1500-GS08
BZX384C5V1-E3
IFSC1008ABER100M01
2N7002K-T1-E3
CRCW06037M15FKEA
MCT06030C1003FP500
MCT06030C3834FP500
CRCW06030000Z0EA0C
CRCW0603383KFKEA
RCWP040220M0FKED
MCT06030C1005FP500
RCS060339R0FKEA
CRCW04021K00JNED
CRCW06030000Z0EA0C
CRCW0603100RFKEA
CRCW04021M00DKEDP
CRCW06031K00FKEA
CRCW06037M50FKEA
MCS04020C2001FE000
RCWP040220M0FKEC/D
CRCW040210K0FKED
CRCW0402100RFKED
CRCW0402100KFKED
Header: 3-pin
Bornier wire to board, 3P
Bornier wire to board, 2P
Photodiodes: blue enhanced, 40 ns, 130°, 2 SMD, no lead
Dual n- and p-channel MOSFET: 12 V, 4.5 A, 6.5 W, surface-mount
PowerPAK® SC-70-6
Header: 8-pin, dual row
AEM10941 - symbol QFN28
Reset switch
Micro USB-B
Ferrite bead: 10 at 100 MHz, 1 A, 0402
Header: 4-pin, dual row, AEM BATT, AEM BAL
11
TEMD5080X01
SiA517DJ-T1-GE3
ILBB0402ER600V
Document Number: 28496
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
TECHNICAL NOTE
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1
DESCRIPTION
196 HVC ENYCAP™ 4 F / 4.2 V, stacked horizontal
SMD ENYCAP™, 2.1 V each, (8 mm x 11 mm, 9 mm x 22 mm)
Monolithic chip inductors
Ceramic capacitor: 100 nF, 10 V, 10 %, X7R, 0402
Ceramic capacitor: 1 nF, 50 V, 5 %, X8R, 0402
Ceramic capacitor: 10 nF, 10 V, 10 %, X7R, 0402
Ceramic capacitor: 1 μF, 25 V, 20 %, X5R, 0402
Ceramic capacitor: 22 μF, 10 V, 20 %, X5R, 0603
Ceramic capacitor: 10 μF, 10 V, 20 %, X5R, 0603
150 μF, ± 20 %, 6.3 V ceramic capacitor X5R, 1206 (3216 metric)
Ceramic capacitor: 10 μF, 10 V, 20 %, X5R
Schottky BAT54 300 mA, 40 V
LED 0402 red
LED 0402 green
Zener 5.1 V, 300 mW, 2-pin SOD-323
Low profile, high current, shielded inductor
Header, 3-pin, dual row
N-channel 60 V MOSFET: SOT23, 0.35 A, 60 V, 1.8
Thick film resistor: 7.15 M, 0603, ± 1 %, AEC-Q200
Thin film resistor: 100 k, 0603, ± 0.1 %
Thick film resistor: 3.48 M, 0603, ± 1 %, AEC-Q200
Resistor: 0 - 0603, resistor 0 - 0603 solder bridge
Thick film resistor: 383 k, 0402, ± 1 %
Thick film resistor: 20 M, 1 %, 0.05 W, ± 100 ppm/°C,
sulfur-resistant
Professional thin film chip resistor: 10 M, 0603, ± 1 %
Pulse withstanding thick film resistor: 39 , 0603, 75 V, anti-surge,
± 1 %, AEC-Q200
Thick film resistor: 1 k, 0402, ± 1 %
Resistor: 0 - 0603, resistor 0R - 0603 solder bridge
Thick film resistor: 100 , 0603, 500 mW, ± 1 %, AEC-Q200
Thick film resistor: 1 M, 0402, ± 0.5 %
Thick film resistor: 1 k, 0603, ± 1 %
Thick film resistor: 7.5 M, 0603, ± 1 %
Professional thin film chip resistor: 2 k, 0402, ± 1 %, 0.1 W
Thick film, high voltage resistor: 20 M, 0402, ± 5 %
Thick film resistor: 10 k, 0402, ± 1 %
Thick film resistor: 100 k, 0402, ± 1 %
Thick film resistor: 100 k, 0402, 1 %
Bornier wire to board, 2P
Header: 1-pin
Header: 2-pin, 2.54 mm
Technical Note
www.vishay.com
Vishay
Energy Harvesting: Eliminating Battery
Replacements for IoT Nodes With 196 HVC ENYCAP™
PRECAUTIONS
ABSOLUTE MAXIMUM RATINGS
Any input pin
Operating temperature
Storage temperature
5.5 V
-20 °C to +85 °C
-40 °C to +85 °C
Primary cell input should be between 0.6 V and 5 V.
Do not connect the jumper “short no PRIM” if a primary cell is attached. This short circuits the header PRIM.
Do not jumper CFG1 to one unless jumpered to a source other than the 196 HVC ENYCAP™ at AEM BATT!
External PV
An external PV cell can be of any voltage up to 5 V max. Dark periods will not discharge the storage element.
INCLUDED MATERIALS
V-Harvester Board
1. Board: 64 mm x 69 mm
2. Set of jumpers
3. This document link to the product specification:
www.vishay.com/doc?28496
4. 196 HVC ENYCAP™ product specification:
www.vishay.com/doc?28409
LINKS
• Batteryless IoT Sensor Telecommunications Applications | Vishay
origin-www.vishay.com/applications/telecommunications/batteryless_iotsensor/
• Vishay - Engineer's Toolbox
origin-www.vishay.com/landingpage/et4/et3te_iot1.html
• SensorXplorer™
www.vishay.com/landingpage/SensorXplorer/
CONTACTS
• If you need further information about storage capacitors, please contact: hybridstorage@vishay.com
• If you need further information about photo PIN diodes, SensorXplorer boards, ambient light sensors, and proximity sensors,
please contact: sensorstechsupport@vishay.com
• If you need further information about this reference design and circuit design support, please contact: iot.sensors@vishay.com
Revision: 11-Aug-2022
12
Document Number: 28496
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
TECHNICAL NOTE
Thank you for using and buying the V-harvester board!
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