VISHAY BCCOMPONENTS
Aluminum Capacitors Technical Note
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Revision: 22-May-2018 1Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
www.vishay.com
By Gerald Tatschl
MAL219699003E3
196 HVC ENYCAPTM - MINI CHARGER AND BACKUP BOARD
DESCRIPTION
The MAL219699003E3 mini charger and backup demonstration circuit is a fully transparent charger unit that uses a BQ24095
charging IC and TPS610997 boost converter IC from Texas Instruments to boost the capacitor voltage up to a 5 V constant
output voltage.
This mini charger is equipped with a 90 F / 4.2 V 196 HVC ENYCAPTM hybrid energy storage capacitor, which is charged through
the power input. This power input is compatible with a USB port. The charged energy is buffered in the 196 HVC capacitor and
can be used for backup power.
An independent fixed output voltage of 5 V is created from the backup power of the hybrid capacitor by the TPS610997
synchronous boost converter IC, which provides a constant output voltage with very high efficiency.
Fig. 1 - Typical block diagram for a backup application and fixed output supply. The storage element is charged
through a USB socket Vsupply. The constant output voltage Vbackup is provided independently from Vsupply by the boost converter.
Alternatively, the path Vcapacitor can be used
ENERGY STORAGE CAPACITOR
A 90 F / 4.2 V 196 HVC ENYCAP hybrid energy storage capacitor is used as an energy buffer in the MAL219690111E3 mini
charger, and will provide a fixed output voltage supply with its backup function.
The backup time provided by the capacitor depends mainly on the backup current and is indicated in Fig. 2. In the proposed
configuration, minutes to hours are achievable.
ENYCAP
TM
Energy storage capacitor
STORAGE
Boost
converter
TPS610997
Charger
BQ24095 V
charge
V
capacitor
V
backup
V
supply
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Technical Note
www.vishay.com Vishay BCcomponents
Revision: 22-May-2018 2Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
Fig. 2 - Typical backup time as a function of discharge current
CHARGING IC
Texas Instruments’ BQ24095 is a low cost linear type (LDO) charger with a CC / CV (constant current / constant voltage) mode
charging profile of up to 1.25 A. The charging current is adjustable to USB requirements. The charging voltage of the CV mode
will be fixed at 4.35 V. The detailing pin assignment is shown in Table 1.
The BQ24095 is a highly integrated linear charger device, targeted at space-limited portable applications. The IC operates from
either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low cost unregulated
adapters.
The BQ24095 has a single power output that charges a backup system. A load can be placed in parallel with the backup
capacitor as long as the average system load does not keep the capacitor from charging fully during the 10-hour safety time.
TABLE 1 - PIN ASSIGNMENT BQ24095
PIN # PIN NAME FUNCTION
1INSource input
Directly connected with a micro USB connector
2 ISET Maximum current setting (CC mode)
R5 is assembled with 2 k to GND for a 300 mA limit
3 VSS Connected to GND
4 PRETERM Maximum current setting (CV mode)
1 k to GND for a 50 mA limit on CV mode charging
5 PG LED indicator for input voltage
ON: input voltage is normal (4.45 V ~ 6.45 V)
OFF: UVLO or input voltage is abnormal
6NCLeave it floating
7 ISET2 Total current limit
Connected to GND, means it follows ISET
8 CHG LED indicator for charging state
ON: charging
OFF: not charging
9TSTemp sensor
Function disabled, 10 k to GND
10 OUT Output of linear charger, directly connected to 196 HVC
4.35 V fixed voltage feedback and regulated
1
10
102
103
104
105
106
10
100
1000
10000
1 10 100 1000 10 000
Axis Title
1st line
2nd line
2nd line
Backup Time (s)
Discharge Current (mA)
C = 90 F (1.4 V to 8.4 V)
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Technical Note
www.vishay.com Vishay BCcomponents
Revision: 22-May-2018 3Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
BOOST IC
Texas Instruments’ TPS610997 is a synchronous boost converter with ultra low quiescent current. This device is designed for
products powered by a power backup solution, for which high efficiency under light load conditions (up to 300 mA at 5 V) and
long backup life operation are critical to achieve.
The TPS610997 supports a true shutdown function when it is disabled, which disconnects the load from the input supply to
reduce the current consumption.
GETTING STARTED
This section provides information on how to start the mini charger.
CHARGING
Plug the micro USB terminal into the connector on the board, or supply power to the mini charger through another terminal,
such as a power bank, a 5 V output, AC/DC adapter, or even just from the USB port of a PC.
A voltage between 4.45 V and 6.45 V is allowed for this input.
DISCHARGING DIRECTLY FROM THE 196 HVC ENYCAP
Connect the load directly to the ENYCAP storage capacitor's pin J2, pin 1 (+), and pin 5 (GND) (take care to stay within the
current and power limits of the charger IC).
If power input is removed, the load will be powered only by the 196 HVC backup capacitor.
In this mode, the voltage of the 196 HVC capacitor will decrease depending on the power consumption of the load.
Typical example: a micro controller unit (MCU) may operate in a working voltage range between 2.7 V and 5 V.
The voltage of the storage capacitor is permitted to drop to n x 0.8 V; n is the number of cells. For example, a 4.2 V 196 HVC
capacitor consists of three cells, so that n x 0.8 V = 2.4 V. In this case, the stored energy of the capacitor cannot be fully used.
DISCHARGING VIA A 5 V FIXED OUTPUT BOOST CONVERTER
For certain load types, such as a fan or LED, fixed voltage output is necessary. In these cases, connect the load to the output
of the boost converter J2, pin 6 (VOUT) and pin 5 (GND), and remove the power source as well.
In this mode, with the boost converter, all stored energy can be used. The load can be powered until the storage capacitor is
completely discharged.
TABLE 2 - PIN ASSIGNMENT TPS610997
PIN # PIN NAME FUNCTION
A1 VIN IC power supply input
Directly connected to 196 HVC, plus terminal
B1 SW Switch pin of the converter. It is connected to the inductor
C1 EN Enable logic input. Logic high voltage enables the device; logic low voltage disables
the device. Do not leave it floating
A2 GND Ground
B2 VOUT Boost converter output; it is fixed at 5 V
C2 FB
Voltage feedback of adjustable output voltage. Connect to the center tap of a resistor
divider to program the output voltage. Connect to GND pin for fixed output voltage
versions
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Technical Note
www.vishay.com Vishay BCcomponents
Revision: 22-May-2018 4Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
SCHEMATIC DIAGRAM
Fig. 3 - Schematic of mini charger
R3
10 kΩ
R4
1 kΩ
R5
2 kΩ
C2
1 μF
C3
1 μF
+
-
C4
CAP-SUPER
C5
10 μF
VBUS1
D- 2
D+ 3
ID 4
GND 5
Shield 8
J1MICRO USB
1
2
3
4
5
6
J2
CON6
IN
1
ISET
2
VSS
3
PRETERM
4
ISET2
7
NC 6
PG5
CHG8
TS9
OUT 10
GND
0
U1
BQ24095
GND
+5 V
GND GND
+5 V
GND
GND
GND
GND
Cap_out
ISET2
D-
D+
D2
LED
R1
1.5 kΩ
R2
1.5 kΩ
+5 V
D1
LED
ISET2
VIN
A1 SW
B1
EN
C1 FB C2
VOUT B2
GND A2
U2
TPS610997
GND
5 VOUT
Cap_out
L1
2.2 μH
Cap_out
R6
0 Ω
GND
5 VOUT
C6
10 μF
C7
10 μF
C8
10 μF
C1
10 μF
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Technical Note
www.vishay.com Vishay BCcomponents
Revision: 22-May-2018 5Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
LAYOUT AND CONNECTION
Fig. 4 - PCB layout, mini charger
BILL OF MATERIAL
NAME VALUE SPECIFICATION MANUFACTURER
C1, C5, C6, C7, C8 10 μF / 16 V MLCC
C2, C3 1 μF / 35 V MLCC
C4 90 F / 4.2 V, MAL219690111E3 196 HVC Vishay
D1, D2 LED, SMD 0603
J1 Micro USB connector
L1 IHLP2020ABER2R2M01, 2.2 μH IHLP Vishay
R1, R2 1.5 k, 0603
R3 10 k, 0603
R4 1 k, 0603
R5 2 k, 0603
R6 NC
U1 BQ24095
U2 TPS610997
Power Management Solution With 196 HVC ENYCAPTM
for Mini Charger and Fixed Voltage Supply Board
TECHNICAL NOTE
Technical Note
www.vishay.com Vishay BCcomponents
Revision: 22-May-2018 6Document Number: 28451
For technical questions, contact: hybridstorage@vishay.com
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
INCLUDED MATERIALS
ENYCAP mini charger kit for 90 F / 4.2 V
1. Board: 30 mm x 40 mm
2. ENYCAP 196 HVC 90 F / 4.2 V, MAL219690111E3
3. USB - micro USB cable
4. This document
Link to the product specification: www.vishay.com/doc?28409
Thank you for using and buying the ENYCAP mini charger board. If you need further information, please contact:
Vishay BCcomponents - Aluminum Capacitors
Mr. Gerald Tatschl, Dipl. Ing.
Sr. Manager Product Marketing Aluminum Capacitors
Ebentaler Strasse 140
A - 9020 Klagenfurt, Austria, Europe
Phone: +43 463 3834 314
Mobile: +43 664 395 00 66
E-mail: hybridstorage@vishay.com
