EnerChip™ CC CBC3112
EnerChip CC with Integrated Power Management
Features
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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 - Lead-Free 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 C
©2009-2010 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 1 of 15
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
Physical Properties
Package size:
Operating temperature:
Storage temperature:
7 mm x 7 mm
-20°C to +70°C
-40°C to +125°C
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
©2009-2010 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
DS-72-04 Rev C
Page 2 of 15
EnerChip CC CBC3112
Device Input/Ouput Descriptions
Pin Number(s)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Label
V
BAT
V
OUT
V
DD
V
CHG
ENABLE
V
MODE
GND
RESET
C
P
C
N
NC
NC
NC
GND
NC
NC
NC
NC
NC
NC
Description
Positive EnerChip Terminal - Tie to Pin 4
System Voltage
Input Voltage
EnerChip Charge Voltage - Tie to Pin 1 and/or Optional
EnerChip(s)
Charge Pump Enable
Mode Select for Backup Switchover Threshold
System Ground
Reset Signal (Active Low)
Flying Capacitor Positive
Flying Capacitor Negative
No Connection
No Connection
No Connection
System Ground
No Connection
No Connection
No Connection
No Connection
No Connection
No Connection
NC
NC
NC
VCHG
ENABLE
NC
NC
NC
GND
RESET
CP
CN
NC
NC
NC
Figure 3: EnerChip CC CBC3112 Package Pin-out
DS-72-04 Rev C
©2009-2010 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 3 of 15
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
4.3
4.3
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)
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
-
-
-20
-40
-
-
5000
1000
2500
500
-
-
12
TYPICAL
V
DD
3.3
2.5
1.5
(1)
25
-
2.8
13
-
-
-
-
10
45
-
MAX
-
3.6
-
-
+70
+125
(2)
4.5
20
-
-
-
-
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)
First month recoverable self-discharge is 5% average.
Storage temperature is for uncharged EnerChip CC device.
Note: All specifications contained within this document are subject to change without notice.
EnerChip Discharge Characteristics
DS-72-04 Rev C
©2009-2010 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 4 of 15
EnerChip CC CBC3112
POWER SUPPLY CURRENT CHARACTERISTICS
Ta = -20ºC to +70ºC
CHARACTERISTIC
Quiescent Current
SYMBOL
I
Q
CONDITION
ENABLE=GND
ENABLE=V
DD
V
DD
=3.3V
V
DD
=5.5V
V
DD
=3.3V
V
DD
=5.5V
MIN
-
-
-
-
-
-
MAX
3.5
6.0
35
38
0.5
42
UNITS
µA
µA
µA
µA
nA
nA
I
QBATOFF
EnerChip Cutoff Current
I
QBATON
V
BAT <
V
BATCO
,
V
OUT
=0
V
BAT >
V
BATCO
,
ENABLE=V
DD
, I
OUT
=0
INTERFACE LOGIC SIGNAL CHARACTERISTICS
V
DD
= 2.5v to 5.5v, Ta = -20ºC to +70ºC
CHARACTERISTIC
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
Logic Input Leakage Current
(1)
SYMBOL
V
IH
V
IL
V
OH
V
OL
I
IN
CONDITION
-
-
V
DD
>V
TH
(see Figures 4
and 5) I
L
=10µA
I
L
= -100µA
0<V
IN
<V
DD
MIN
V
DD
- 0.5
-
V
DD
-
0.04V
(1)
-
-1.0
MAX
-
0.5
-
0.3
+1.0
UNITS
Volts
Volts
Volts
Volts
nA
RESET tracks V
DD
; RESET = V
DD
- (I
OUT
x R
OUT
).
RESET SIGNAL AC/DC CHARACTERISTICS
V
DD
= 2.5v to 5.5v, Ta = -20ºC to +70ºC
CHARACTERISTIC
V
DD
Rising to RESET
Rising
V
DD
Falling to RESET
Falling
Mode 1 TRIP V
V
DD
Rising
Mode 2 TRIP V
(2)
V
DD
Rising
RESET Hysteresis
Voltage
(3)
(V
DD
to RESET)
SYMBOL
t
RESETH
t
RESETL
V
RESET
V
RESET
CONDITION
V
DD
rising from 2.8V TO 3.1V
in <10µs
V
DD
falling from 3.1V to 2.8V
in <100ns
V
MODE
= GND
V
MODE
= V
DD
/2
V
MODE
=V
DD
MIN
60
0.5
2.80
2.25
60
45
30
MAX
200
2
3.20
2.60
100
75
50
UNITS
ms
µs
V
V
V
HYST
V
MODE
=GND
V
MODE
= V
DD
/2
mV
(2)
(3)
User-selectable trip voltage can be set by placing a resistor divider from the V
MODE
pin to GND. Refer to Figure 8.
The hysteresis is a function of trip level in Mode 2. Refer to Figure 9.
DS-72-04 Rev C
©2009-2010 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 5 of 15
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