SLVAFC9 August   2022 TPS61094

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction of Solar Cell and MPPT
    1. 1.1 Traditional MPPT Solution
  4. 2Typical System with Solar cell
    1. 2.1 General Introduction
    2. 2.2 Specific End Equipment
      1. 2.2.1 System Requirements
  5. 3TPS61094 Solution
    1. 3.1 Supercap and Battery Design
    2. 3.2 Solar Panel Design
    3. 3.3 TPS61094 Description and Operation
    4. 3.4 System Solution
  6. 4Test Report Based on TPS61094 Solution
    1. 4.1 Test Waveform
  7. 5References

3.1 Supercap and Battery Design

An energy storage element is a necessary condition to realize this system, Supercap or batteries can be used here as energy storage elements. For this system, the capacity of the energy storage element needs to meet the power supply requirements of the system during the dark hours of the day. The choice of the supercap or batteries can be calculated by the following equation.

Equation 1. C = 2 t P a v e r a g e η ( U m a x 2 - U m i n 2 )

Here select, η≈90%, according to the environment condition and system requirement. The supercap needs to be able to discharge at a constant power of 1 mA for 12 hours. Based on Equation 1, the super cap in the system needs to be more than 55 F.