ENERGY HARVESTING POWERED BY ULTRA-LOW POWER AND ULTRA-LOW VOLTAGE OPERATION BOOST CHARGE PUMP

S-8823A Series

10



Standard Circuits

S-8823A

Series

CPOUT

VSS

VIN

OUT

VM

LED

1-cell power supply

by biofuel or solar

cell

0.47

μF

Figure 7 Intermittently LED Driving Circuit

μF, Ta = +25°C

μF, Ta = +25°C

t (5 s / div.)

3

2

1

0

0.5

0

3

2

1

0

3

2

1

0

0.5

0

3

2

1

0

t (2 s / div.)

Figure 8 Startup Waveform for Intermittently LED Driving

Figure 9 Steady-state Operation Waveform for Intermittently

LED Driving