DS-72-40 Datasheet, PDF (8/17 Pages) Cymbet Corporation – EnerChip™ CC Energy Harvester Evaluation Kit

CBC-EVAL-10B EnerChip CC EH Evaluation Kit
EVAL-10B CCEH Operation During EnerChip Battery Charging
The following scope traces show the operation of the EnerChip CBC3150 operation under two different light
conditions. The scope trace in Figure 4 was taken under a light source of 500 Lux on the EVAL-10B solar cell.
The Input voltage trace on the top line in Yellow shows the activity at Test Point TP3. The input voltage is at 3.6
Volts until the EnerChip Charging Circuit activates as shown on the second trace which is the activity on the
RESET/ pin on the CBC3150. The EVAL-10B 3.3V output voltatge during these activites is shown in the green
trace.
Input = 3.60V until charger starts then drops to
3.06V as charger dranis input capacitor
RESET/ ON = Charger
Output = 3.3V
Figure 4 : EVAL-10B operation at 500 Lux light intensity
The scope trace in Figure 5 was taken under a light source of 100 Lux on the EVAL-10B solar cell. The Input
voltage trace on the top line in Yellow shows the activity at Test Point TP3. Given the decrease in light level,
the input voltage is at 3.25 Volts until the EnerChip Charging Circuit activates as shown on the second trace
which is the activity on the RESET/ pin on the CBC3150 which has a shorter pulse width in low light conditions.
The EVAL-10B 3.3V output voltatge is still preserved in this case as shown in the green trace.
InpIuntp=ut3=.235.V60uVntuilnctihlacrhgaerrgsetrarstsartthsetnhednrodprsoptos to
3.036.V06aVs cahsacrhgaerrgderadnriasniinspiuntpcuatpcaacpiatocritor
RESET/ ON = Charger
Output = 3.3V
Figure 5 : EVAL-10B operation at 100 Lux light intensity
©2014 Cymbet Corporation • Tel: [phone] • www.cymbet.com
DS-72-40 Rev C

Page 8 of 17