CBC910
Power Manager ASIC
Charge Pump and Battery Management ASIC
Features
•
•
•
•
•
•
•
•
Power Manager with Charge Control
Built-in Battery Protection
Temperature Compensated Charge Control
Adjustable Switchover Voltage
Charges Battery Over a Wide Supply Range
Low Standby Power
CBC-910-BUC solder bumped version available
Eco-Friendly, RoHS Compliant
The CBC910 is a power management solution
that provides battery backup control and power
management for systems requiring power bridging
and/or secondary power.
During normal operation, the CBC910 delivers a
controlled voltage using an internal charge pump that
operates from 1.5 V to 5.5 V. An ENABLE pin allows
for activation and deactivation of the charge pump
using an external control line in order to minimize
current consumption when battery charge current is
not needed.
When the primary power supply dips below a user-
defined threshold voltage, the CBC910 will signal
this event and route the battery voltage to V
OUT
.
The CBC910 also has battery protection circuitry to
protect an attached battery from being discharged
too deeply.
The CBC910 is available in an 8-pin VDFN package
and as a bare die having 9 bond pads.
Preliminary
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 energy
storage device with energy transducers such as
solar panels.
Figure 1 - Typical CBC910 Applica-
tion Circuit Using External EnerChip
Rechargeable Battery as a Backup
Power Source for a Real-Time Clock
DS-72-11 Rev 5
©2012 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 1 of 14
Preliminary
Electrical Properties
Physical Properties
Package size:
Die size:
Operating temperature:
Storage temperature:
Battery Backup Output voltage:
3.3 V
CBC910
3 mm x 3 mm x 0.9 mm
0.96 mm x 1.36 mm (to center of scribe on wafer)
-40°C to +85°C
-40°C to +125°C
Functional Block Diagram
The CBC910 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 battery. RESET is a digital output that,
when low, indicates V
OUT
is being sourced by a backup battery.
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 CBC910 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.
VCHG
GND
Figure 2: CBC910 Internal Block Diagram
DS-72-11 Rev 5
©2012 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 2 of 14
Preliminary
POWER SUPPLY CURRENT CHARACTERISTICS
Ta = -40ºC to +85ºC
CHARACTERISTIC
Quiescent Current
CBC910
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
Backup Battery 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 = -40ºC to +85ºC
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 = -40ºC to +85ºC
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)
(2)
(3)
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
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-72-11 Rev 5
©2012 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 5 of 14
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
