Preliminary
EnerChip CC CBC3105
Electrical Properties
EnerChip Backup Output voltage:
Energy Capacity (typical):
Recharge time to 80%:
Charge/Discharge cycles:
3.3V
5µAh
10 minutes
>5000 to 10% discharge
Physical Properties
Package size:
Operating temperature:
Storage temperature:
4mm x 5mm
-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 (VDD) is
applied to the charge pump, the control logic, and is compared to the user-set threshold as determined by the
voltage on VMODE. VMODE is an analog input ranging from 0V to VDD. The ENABLE pin is a digital input that
turns off the charge pump when low. VOUT is either supplied from VDD or the integrated EnerChip. RESET is a
digital output that, when low, indicates VOUT is being sourced by the integrated EnerChip.
CFLY 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 CBC3105 Internal Block Diagram
©2012 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
DS-72-21 Rev E
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