ST EnFilm EFL1K0AF39 User manual

September 2017
DocID026737 Rev 5
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www.st.com
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User manual
EnFilm™ evaluation board kits and design-in board user guide
Introduction
This note describes the operation and the instruction for using the two kits developed for training and
supporting the design of the solid state thin film battery EnFilm™ EFL1K0AF39:
The EFL2-NFC-PMB design-in kit (order code: EFL2-NFC-PMB) includes a power management
board embedding a NFC contactless smart charger and an advanced ST ultra-low current
consumption EnFilm™ power management solution on a tiny EFL1K0AF39 footprint size board
(Figure 1: "The EnFilm™ EFL1K0AF39 on board" and Figure 2: "The EFL2-NFC-PMB design-in
kit"). It can be directly connected in the application for a fast evaluation of ST EnFilm™ technology.
The EFL2-EVALKIT evaluation kit (order code: EFL2-EVALKIT) allows to discover the operation of
the EFL1K0AF39 and to monitor the voltage and the charge/ discharge current in real use-case
condition. It includes one EnFilm™ monitoring load board and one EFL2-NFC-PMB power
management board (Figure 3: "The EFL2-EVALKIT evaluation kit").
Figure 1: The EnFilm™ EFL1K0AF39 on board

General description and features
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Figure 2: The EFL2-NFC-PMB design-in kit
Figure 3: The EFL2-EVALKIT evaluation kit

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Contents
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Contents
1General description and features....................................................4
1.1 The EFL2-NFC-PMB power management board..............................4
1.2 The EnFilm™ load board from EFL2-EVALKIT.................................4
2The EFL2-NFC-PMB..........................................................................5
2.1 Pictures of the EFL2-NFC-PMB board..............................................5
2.2 Block diagram of the EFL2-NFC-PMB board ....................................5
2.3 Using the EFL2-NFC-PMB board......................................................5
3The EFL2-EVALKIT...........................................................................8
3.1 Description of the complete evaluation kit with the EFL2-NFC-PMB
connected to the EnFilm™ load board (LB) ...................................................8
3.2 Block diagram of the complete evaluation kit with the EFL2-NFC-
PMB connected to the EnFilm™ load board ..................................................9
3.3 Using the complete EFL2-EVALKIT evaluation kit............................9
3.4 Use case with a PV energy harvester.............................................10
4Electrical schematics.....................................................................13
4.1 EnFilm™ load board from EFL2-EVALKIT......................................13
4.2 EFL2-NFC-PMB power management board ...................................14
5Bill of materials...............................................................................15
6Revision history..............................................................................17

General description and features
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1 General description and features
The EnFilm™ EFL1K0AF39 battery brings many benefits compared to conventional
battery:
Low thickness
Fast charge
Low self-discharge
Extremely long calendar and cycle life time
High safety with no risk of burning or explosion
EFL2-NFC-PMB and EFL2-EVALKIT kits were developed to help designers to evaluate the
charge and discharge performances of the EnFilm™ EFL1K0AF39 with a proper setup of
power management.
The EFL2-NFC-PMB power management board includes one PCB. It has the same size as
the EFL1K0AF39 battery which is mounted on the top side. It can be charged by different
type of energy source and can be connected to any kind of load with its own power
management circuit.
Whatever the harvester and load system are, the EFL2-NFC-PMB allows a safe and
efficient use of the EFL1K0AF39 micro-battery.
1.1 The EFL2-NFC-PMB power management board
Includes an embedded NFC contact-less smart charger based on the ST M24LR04E-
R dynamic NFC/RFID tag IC for easy and fast EnFilm™ charge
Manages the charge voltage regulation and the deep discharge protection of the
EFL1K0AF39 using an advanced ST ultra-low current consumption power
management IC
Includes also an additional power input pin for wire plugging of an external charger like
an energy harvesting source or any other power supply (4.5V MIN).
The EFL2-NFC-PMB can be powered by a NFC/RFID reader, a NFC-enabled phone, a
photo-voltaic panel or any kind of harvester with its own power management.
1.2 The EnFilm™ load board from EFL2-EVALKIT
The EnFilm™ load board board is included inside the EFL2-EVALKIT kit together with an
EFL2-NFC-PMB power management board. The EnFilm™ load board embeds:
An analog ammeter and a digital voltmeter allowing the user to monitor:
The current delivered by the source by pressing PB1.
The current going through the EFL1K0AF39 battery by pressing PB2.
The battery voltage
A pulsed load emulator with the possibility to adjust the pulsed load cyclic ratio. Its
features are:
Enable / disable function by toggling the switch SW3.
Default pulsed load current set to 5 mA during a pulse time of 100 ms every 10 s.
Tunable pulse duration from 1 ms up to 100 ms through RA1 rheostat.
Tunable pulse repetition time from 1 s up to 10 s through RA2 rheostat.
The LB can be powered via 2 mm banana connectors or a micro-USB plug.
The use of the EnFilm™ load board is recommended to get familiar with operations of
EFL2-NFC-PMB power management board and thus with the EFL1K0AF39 electrical
management characteristics.

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The EFL2-NFC-PMB
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2 The EFL2-NFC-PMB
2.1 Pictures of the EFL2-NFC-PMB board
Figure 4: EFL2-NFC-PMB board top side
Figure 5: EFL2-NFC-PMB board bottom side
2.2 Block diagram of the EFL2-NFC-PMB board
Figure 6: Synoptic of the EFL2-NFC-PMB board
2.3 Using the EFL2-NFC-PMB board
The EFL2-NFC-PMB board can be used with the EnFilm™ load board or separately in your
own application. It can be plugged directly in your system to supply a real IoT (Internet of
Things) device with a micro-controller and radio circuit load.
For this, it will be necessary to jump strap POWER to CHGIN pins and BATIN to BAT pins
as shown below in Figure 7: "Description of the EFL2-NFC-PMB board".