ST EnFilm EFL1K0AF39 User manual

September 2017
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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

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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".

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Figure 7: Description of the EFL2-NFC-PMB board
The EFL2-NFC-PMB board characteristics are the following at 25°C:
4.2 V output voltage limitation during the charge of the battery
Deep discharge battery protection when output voltage gets down to 3.3 V
Easy NFC contact-less fast charge with LED indicator on top EnFilm™ side
Ultra-low nano-current consumption on EnFilm™:
350 nA MAX in battery power supply mode (power backup)
10 nA MAX in shelf mode or brown-out protection mode
Ultra-low micro-power consumption on external charger input:
4.5 μW MIN power need to start charging with an energy harvesting source
An external PV panel or any other energy harvesting source connected on PV and GND
pins should have an output voltage above 4.5 V to enable the EnFilm™ charge.
The EFL2-NFC-PMB board can be wirelessly charged thanks to the embedded NFC/RFID
smart charger. This unique feature allows easy and fast EnFilm™ charge thanks to any
NFC/RFID reader or NFC-enabled phone.
For quick start, ST recommends the use of the RF transceiver demonstration board
included inside the ST M24LR-DISCOVERY kit (order code: M24LR-DISCOVERY).
For detailed information, refer to the ST UM1589 user manual available on www.st.com.
The RF transceiver board is an USB RFID reader demonstration board that includes the
CR95HF 13.56-MHz multi-protocol contact-less transceiver. This board has to be plugged
in to a PC and comes with a demonstration software.

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Figure 8: RF transceiver demonstration board
Using the EFL2-NFC-PMB board with the ST RF transceiver demonstration board :
a. Download and install the M24LR/CR95 application software setup file
[STSWM24LR011] available in dedicated web pages on www.st.com.
b. Connect the RF transceiver demo board to a PC with a USB cable.
c. Launch setup.exe, and select CR95HF Demo Kit. Then, open the Demo NDEF
messages menu or the Image Transfert Application menu for example.
d. Place the EFL2-NFC-PMB board antenna close to the RF transceiver demo
board antenna
The RF transceiver board powers the EFL2-NFC-PMB board and the green LED is lighting.
Using the EFL2-NFC-PMB board with Android NFC phones :
a. Enable NFC communication on your phone (Settings >Wireless and Networks >
NFC).
b. Download the NfcV-Reader Application from Google Play Store.
c. Launch the NfcV-Reader application.
d. Place the phone's NFC antenna close to the EFL2-NFC-PMB board antenna.
The phone powers the EFL2-NFC-PMB board and the green LED is lighting. Please note
that performance may vary depending on the NFC phone and its RF management system.

The EFL2-EVALKIT
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3 The EFL2-EVALKIT
3.1 Description of the complete evaluation kit with the EFL2-
NFC-PMB connected to the EnFilm™ load board (LB)
Figure 9: Description of the EFL2-NFC-PMB connected to the EnFilm™ load board

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3.2 Block diagram of the complete evaluation kit with the EFL2-
NFC-PMB connected to the EnFilm™ load board
Figure 10: Synoptic of the EFL2-EVALKIT evaluation kit
3.3 Using the complete EFL2-EVALKIT evaluation kit
The complete discovery kit gives the possibility to monitor the EFL1K0AF39 charging and
discharging currents as if the EFL1K0AF39 battery was used in a real case application with
high pulse current load. It also helps to monitor the charging current delivered by an
external charger like an energy harvesting device or an NFC source.
First, connect a +5 V power supply on the LB board via both 2 mm banana plugs or the
USB connector. Toggle the SW3 switch to the left position in order to switch “OFF” the
pulsed load emulator operation.
Then, connect an external PV panel or any other energy harvesting device having an
output voltage above +4.5 V to the left side connector of the EFL2-NFC-PMB board as
shown in the Figure 9: "Description of the EFL2-NFC-PMB connected to the EnFilm™ load
board" (PV+ and PV- pins).
In order to monitor the current delivered by the PV through the analog ammeter, press the
PB1 push button. The ammeter sensitivity can be adjusted by selecting the correct position
of the RS1 rotary switch (depending on the PV current capability for instance) :
Position 1: “10” marking on the ammeter means 10 mA current is flowing.
Position 2: “10” marking on the ammeter means 1 mA current is flowing.
Position 3: “10” marking on the ammeter means 100 μA current is flowing.
Pressing the PB2 push button will show through the ammeter the current that goes in (+) or
out (-) of the EFL1K0AF39 micro-battery.

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The digital voltmeter indicates the charging voltage of the EFL1K0AF39. This digital
voltmeter shall indicate +4.2 V when the EFL1K0AF39 is fully charged.
By turning “ON” the SW3 switch (right position), a current burst operation mode is emulated
(default settings: 5 mA / 100 ms every 10 s). In order to see the response of the PMB
board, press PB1 or PB2 (never press both at the same time). This will show how the
charger and PMB work together. If the charge source does not provide enough current, the
PMB board will supply burst current until the EFL1K0AF39 voltage gets down to its security
range. Indeed, when the battery voltage falls below 3.3 V the power management IC
embedded on the PMB board will disconnect the EFL1K0AF39 in order to prevent it from
deep discharge.
The adjustment of the pulsed load duty cycle can be performed with RA1 and RA2
rheostats. RA1 controls the pulse duration whereas RA2 controls the pulse repetition time.
A probe scope can be connected between TP3 and TP4 test points to tune the switching
time of the pulse load.
If for any reason there is a need to fast charge the EFL1K0AF39 then users can easily pair
the EFL2-NFC-PMB board to an external NFC TX source for wireless charging.
3.4 Use case with a PV energy harvester
Step1: Control of the efficiency of the PV energy harvester
The load is disconnected. Pressing PB1 permits the user to monitor the current delivered
by the PV energy harvester. Then, activate the pulsed load current emulation by toggling
SW3 switch on the EnFilm™ load board
Figure 11: Step 1 schema and picture

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Step2: Connection of the load for 100 ms
PB2 monitors the current in the EFL1K0AF39. The load is supplied by the EFL1K0AF39,
the PV harvester and the buffer output capacitor at the same time. Voltage drops
consequently from some tens of mV.
Figure 12: Step 2 schema and picture
Step3: At the very beginning of disconnection of the load
PB2 monitors the current in the EFL1K0AF39. The EFL1K0AF39 is recharging the output
capacitor, so current is still negative but reduces as the buffer cap gets charged.
Figure 13: Step 3 schema and picture

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Step4: Load disconnected after a while
PB2 monitors the current in the EFL1K0AF39. Once the buffer cap is charged, the
EFL1K0AF39 is getting charged at its turn by the PV harvesting system so the current is
positive now and the battery voltage limitation of 4.2 V is reached.
Figure 14: Step 4 schema and picture

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Electrical schematics
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4 Electrical schematics
4.1 EnFilm™ load board from EFL2-EVALKIT
Figure 15: Electrical schematic of the EnFilm™ load board

Electrical schematics
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4.2 EFL2-NFC-PMB power management board
Figure 16: Electrical schematic of the EFL2-NFC-PMB board

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Bill of materials
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5 Bill of materials
Table 1: BOM of the EnFilm™ load board
Ref.
Designation
Supplier
Ref. parts
Value
BP1
SWITCH PUSH BUTTON
APEM
18545CD
BP2
SWITCH PUSH BUTTON
APEM
18545CD
C3
Ceramic Capacitor
AVX
06035C103JAT2A
10nF
C4
Ceramic Capacitor
KEMET
C0603C475K9PACTU
4.7μF
C5
Ceramic Capacitor
MURATA
GRM31CR60J227M
220μF
C6
Ceramic Capacitor
MURATA
GRM31CR60J227M
220μF
CDU2
Ceramic Capacitor
KEMET
C0603C104K4RACTU
100μF
CN2
Micro-USB SMD
connector
TE Connectivity
1981584-1
CN3
2mm Standard tip plug
WIMA
105-0752-001
Red
CN4
2mm Standard tip plug
WIMA
105-0753-001
Black
CN5
Board-to-Board
Connector
MOLEX
22.05.2081
8 way / 2.54
mm pitch
D3
Schottky diodes
NXP
BAS70-07
DL1
LED
WURTH
150060RS75000
Red
GV
Ammeter PM-2 / +-50UA
MONACOR
29.045
Q2
N-Channel MOSFET
DIODES INC.
DMG6968U7
R1
Resistor
BOURNS
CR0603FX1501ELF
1,5K ohms
R2
Resistor
BOURNS
CR0603J000ELF
0 ohms
R3
Resistor
PANASONIC
ERJ3EKF3003V
300K ohms
R4
Resistor
PANASONIC
ERA6ARW104V
100K ohms
R5
Resistor
PANASONIC
ERJU06F8200V
820 ohms
R6
optional / not populated
R7
Resistor
PANASONIC
ERA6AEB105V
1M ohms
R8
Resistor
PANASONIC
ERA6AEB103V
10K ohms
R9
Resistor
PANASONIC
ERJ6RQF2R0V
2 ohms
R10
Resistor
PANASONIC
ERJ6ENF20R0V
20 ohms
R11
Resistor
VISHAY
CRCW0805220RFKEA
220 ohms
R12
Resistor
PANASONIC
ERJP03F3000V
300 ohms
RA1
Trimmer 50KOHM, 10%,
12TURN
BOURNS
3224X-1-503E
0-50K ohms
RA2
Trimmer 5MOHM, 10%,
25TURN
BOURNS
3299P-1-505LF
0-5M ohms
RS1
Rotary DIP Switch
C&K
RTE03-10N-04
SW3
SPDT On-On Switch
APEM
TL36W0050
U2
Precision Timer
STMicroelectronics
NE555D
U3
Digital voltmeter
LASCAR
DPM 1AS-BL
PCB
LB board
AXIANE

Bill of materials
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Table 2: BOM of the EFL2-NFC-PMB board
Ref.
Designation
Supplier
Ref. parts
Value
C0,C1
CAP / optional / not
populated
C2,C3,C5,C8
CAP CER 0.1UF 50V
10% X7R
MURATA
GRM155R71H104KE14
100 nF
C4,C6,C9
CAP CER 4.7UF 10V
10% X5R
MURATA
GRM185R61A475KE11
4.7 uF
C11,C12,C13
C14,C15,C16
CAP / optional / not
populated
C7
CAP CER 1UF 25 V
10% X5R
MURATA
GRM185R61E105KA12
1.0 uF
D1,D2,D3,
D4,D5,D7
DIODE SCHOTTKY
40V 200MA
DIODES INC
BAS40LP-7
D6
DIODE ZENER 5.6 V
120 MW
PANASONIC
DZ2705600L
D8
LED GREEN 54MW 20
MA
ROHMS
SML-P11MTT86
L1,L2
IND 2.2UH 600 MA
340 MOHM
MURATA
LQM21PN2R2MC0D
2.2 uH
R1,R3,R6
RES SMD 0.0 OHM
1/10W
MURATA
ERJ-2GE0R00X
0 Ohms
R30
RES SMD 20 KOhms
1% 1/10W
MURATA
ERJ-2RKF2002X
20 KOhms
TP5,TP6
CONNECTOR PV
external source
SAMTEC
CES-102-01-T-S
2-way
2.54 mm pitch
TP15,TP16
CONNECTOR OUT
power output
SAMTEC
CES-102-01-T-S
2-way
2.54 mm pitch
TP7 to TP14
CONNECTOR EnFilm
load board
SAMTEC
CES-108-01-T-S
8-way
2.54 mm pitch
U1
PRINTED COIL NFC
ANTENNA
STMicroelectronics
Width=25.7mm
Length=18.5mm
#turns = 9
U2
NFC/RFID 4KBIT
EEPROM
STMicroelectronics
M24LR04E-RMC6T/2
U3
EnFilm™ Power
Management IC
STMicroelectronics
STBC15AQTR
U4
EnFilm™ - rechargeable
solid state lithium thin
film battery
STMicroelectronics
EFL1K0AF39
1mA.h / 3.9V
0.16mm thick
SHEET
Ferrite Sheet for NFC
wireless charging.
LAIRD
MHLL6060-300
0.09mm thick
PCB
NFC PMB board
CIBEL
SmartPMB v10
FR4 28x31mm²
0.70mm thick

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Revision history
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6 Revision history
Table 3: Document revision history
Date
Revision
Changes
19-Jan-2015
1
Initial release.
20-Aug-2015
2
Updated Figure 1, Figure 2, Figure 3, Figure 4, Figure 6, Figure 8,
Figure 9, Figure 10, Figure 11. Updated Section 8: Bill of materials
and minor text changes to improve readability.
21-Apr-2016
3
Complete update to add new development information and to
improve readability.
04-Apr-2016
4
Updates Introduction.
13-Sep-2017
5
Complete update to add new development information and to
improve readability.

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