Design Support

#1　Enter a type and output characteristics of the environmental power generation element.

#2　Enter the type of step-up DC/DC converter.

#3　Finally, press Run.

Power can be generated when there is an intersection point between the power characteristics of the power generator (blue line) and the input characteristics of the step-up DC/DC converters (black line). The input voltage and current of the step-up DC-DC converter and the output power and current are also displayed in the table. 

In addition, this output power can be used to predict the charging time as follows:

• Charge time [sec] ＝3V × I × T ÷ POUT
  • I [mA] : Average current of the system to be operated
  • T [msec] : System operating time
  • POUT [uW] : Output power of AP447x calculated by the simulator

If there is no intersection point between the blue and black lines, the power to the step-up DC/DC converter is insufficient, and the step-up circuit does not start up.

In addition, the input voltage/current and output power/current of the step-up DC-DC converter are all displayed as 0.

For example, if the result shown on the left side is obtained, increase the short-circuit current of the generator elements in order to boost the voltage (= create an intersection). For example, you can connect several generating elements in parallel.