EnerChip™ CC CBC3112
EnerChip CC with Integrated Power Management
Features
•
•
•
•
•
•
•
•
•
•
•
Power Manager with Charge Control
Integrated 12µAh Thin Film Energy Storage
Built-in Energy Storage Protection
Temperature Compensated Charge Control
Adjustable Switchover Voltage
Charges Integrated EnerChip Over a Wide Supply
Range
Low Standby Power
SMT - Solder Reflow Tolerant
Thousands of Recharge Cycles
Low Self-Discharge
Eco-Friendly, RoHS Compliant
7 mm x 7 mm
DFN SMT Package:
The EnerChip CC is the world’s first Intelligent Thin
Film Energy Storage Device. It is an integrated
solution that provides backup energy storage and
power management for systems requiring power
bridging and/or secondary power. A single EnerChip
CC can charge up to 10 additional EnerChips
connected in parallel.
During normal operation, the EnerChip CC charges
itself with a controlled voltage using an internal
charge pump that operates from 2.5V to 5.5V. An
ENABLE pin allows for activation and deactivation
of the charge pump using an external control line
in order to minimize current consumption and take
advantage of the fast recharge time of the EnerChip.
When the primary power supply dips below a user-
defined threshold voltage, the EnerChip CC will signal
this event and route the EnerChip voltage to V
OUT
.
The EnerChip CC also has energy storage protection
circuitry to enable thousands of recharge cycles.
The CBC3112 is a 20-pin, 7 mm x 7 mm Dual Flat No-
lead (DFN) package, available in tubes, trays, or tape-
and-reel for use with automatic insertion equipment.
Applications
•
Standby supply
for non-volatile SRAM, Real-time
clocks, controllers, supply supervisors, and other
system-critical components.
•
Wireless sensors and RFID tags
and other
powered, low duty cycle applications.
•
Localized power source
to keep microcontrollers
and other devices alert in standby mode.
•
Power bridging
to provide back-up power to
system during exchange of main batteries.
•
Consumer appliances
that have real-time
clocks; provides switchover power from main
supply to backup battery.
•
Business and industrial systems
such as:
network routers, point-of-sale terminals, single-
board computers, test equipment, multi-function
printers, industrial controllers, and utility meters.
•
Energy Harvesting
by coupling the EnerChip
with energy transducers such as solar panels.
Figure 1 - Typical EnerChip CC
Application Circuit
DS-72-04 Rev F
©2009-2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 1 of 16
EnerChip CC CBC3112
Electrical Properties
EnerChip Backup Output voltage:
Energy Capacity (typical):
Recharge time to 80%:
Charge/Discharge cycles:
3.3V
12µAh
10 minutes
>5000 to 10% discharge
Package size:
Operating temperature:
Storage temperature:
Physical Properties
7 mm x 7 mm
-20°C to +70°C
-40°C to +125°C (prior to 1st charge)
Functional Block Diagram
The EnerChip CC internal schematic is shown in Figure 2. The input voltage from the power supply (V
DD
) is
applied to the charge pump, the control logic, and is compared to the user-set threshold as determined by the
voltage on V
MODE
. V
MODE
is an analog input ranging from 0V to V
DD
. The ENABLE pin is a digital input that turns
off the charge pump when low. V
OUT
is either supplied from V
DD
or the integrated EnerChip. RESET is a digital
output that, when low, indicates V
OUT
is being sourced by the integrated EnerChip.
C
FLY
is the flying capacitor in the voltage doubler circuit. The value of C
FLY
can be changed if the output
impedance of the EnerChip CC needs to be modified. The output impedance is dictated by
1/fC,
where
f
is the
frequency of oscillation (typically 100kHz) and
C
is the capacitor value (typically 0.1µF). GND is system ground.
Figure 2: EnerChip CC CBC3112 Internal Block Diagram
©2009-2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
DS-72-04 Rev F
Page 2 of 16
EnerChip CC CBC3112
Absolute Maximum Ratings
PARAMETER
V
DD
with respect to GND
ENABLE and V
MODE
Input Voltage
V
BAT
(1)
V
CHG
V
OUT
RESET Output Voltage
CP, Flying Capacitor Voltage
CN
(1)
(1)
CONDITION
25°C
25°C
25°C
25°C
25°C
25°C
25°C
25°C
MIN
GND - 0.3
GND - 0.3
3.0
3.0
GND - 0.3
GND - 0.3
GND - 0.3
GND - 0.3
TYPICAL
-
-
-
-
-
-
-
-
MAX
6.0
V
DD
+0.3
4.15
4.15
6.0
V
OUT
+0.3
6.0
V
DD
+0.3
UNITS
V
V
V
V
V
V
V
V
No external connections to these pins are allowed, except parallel EnerChips.
Operating Characteristics
PARAMETER
Output Voltage V
OUT
Output Voltage V
OUT
(backup mode)
EnerChip Pulse Discharge Current
Self-Discharge (5-yr. average; 25°C)
Operating Temperature
Storage Temperature
Cell Resistance (25°C)
Recharge Cycles
(to 80% of rated ca-
pacity; 4.1V charge
voltage)
25°C
40°C
CONDITION
V
DD
> V
TH
V
DD
< V
TH
MIN
-
2.2
-
-
-40
(2)
-40
-
-
5000
1000
2500
500
-
-
12
TYPICAL
V
DD
3.3
2.5
1.5
(1)
25
-
2.15
10.7
-
-
-
-
10
45
-
MAX
-
3.6
-
-
+70
+125
(3)
5.35
21.3
-
-
-
-
22
70
-
UNITS
V
V
-
% per year
% per year
°C
°C
kΩ
cycles
cycles
cycles
cycles
minutes
µAh
-
Non-recoverable
Recoverable
Variable - see App. Note 1025
-
-
Charge cycle 2
Charge cycle 1000
10% depth-of-discharge
50% depth-of discharge
10% depth-of-discharge
50% depth-of-discharge
Charge cycle 2
Charge cycle 1000
50µA discharge; 25°C
Recharge Time (to 80% of rated
capacity; 4.1V charge; 25°C)
Capacity
(1)
(2)
(3)
First month recoverable self-discharge is 4% average.
Cell resistance and charging time increase with decreasing temperature.
Storage temperature is for EnerChip CC device before 1st charge is applied.
Note: All specifications contained within this document are subject to change without notice.
DS-72-04 Rev F
©2009-2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 4 of 16
EnerChip CC CBC3112
EnerChip Charging Characteristics
The EnerChip can be recharged quickly. The following graphs illustrate the correlation between charging time
and charging current into a discharged cell, and also the cumulative charge vs. charging time. Both graphs are
typical based on constant 4.1V charging at room temperature. Charging time increases at lower temperature.
EnerChip Charging Profile
120
100
Current (µA)
80
60
40
20
0
0
20
40
60
80
100
120
140
160
Charge Time (minutes)
Current (µA)
Voltage (V)
CBC3112
4.5
4
3.5
2.5
2
1.5
1
0.5
0
Voltage (V)
100
3
Charge Capacity vs. Time
18
16
Charge Capacity (µAh)
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
70
80
90
Charge Time (minutes)
CBC3112
EnerChip Temperature Characteristics
EnerChip cell resistance increases (decreases) with decreasing (increasing) temperature. The following graph
represents typical cell resistance over the rated operating temperature range.
EnerChip Cell Resistance
100000
CBC012
Cell Resistance (Ω)
10000
1000
100
-40
-20
0
20
40
60
80
Temperature (°C)
DS-72-04 Rev F
©2009-2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 5 of 16
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