What are the peak input power and current limit for SPV1050?

[Prajnyajit]

I'm using a 694W solar cell whose Voc is 6V, Vload = 5.03V at MPP (Maximum Power Point). Its Isc and ILoad are 160mA and 138 mA at MPP. Under this condition, is it safe to use SPV1050?

[Peter BENSCH]

You probably made a mistake and mean 694mW, right?

Regarding SPV1050: as you can read in the data sheet, the maximum battery charging current is given as 70mA and therefore doesn't fit in your application.

Regards

/Peter

[Prajnyajit]

​Hi, Peter! Thank you so much for your answer.

​I'm using a 0.6W solar cell whose specifications are as below

Voc = 6.2V

​Vload (Max) = 5.02V

​Isc = 147mA

Iload (Max) = 138mA

​

I am using a 1000 mAh lithium-ion cell as storage. Please let me know should if I can use SPV1040 instead of SPV1050?

​

[Peter BENSCH]

The SPV1040 should be able to handle this, but please read the data sheet carefully as table 4 lists some precautions, e.g. for output voltages above 4.8V:

According to the absolute maximum ratings the output charge voltage cannot be above 4.8 V but if a higher VOUT up to

5.2 V is needed, a Schottky diode must be placed between the Lx and VOUT pins as shown in Figure 1. In such way the

Schottky diode in parallel to the embedded P-channel MOSFET reduces the voltage drop between the VLX pin and the

VOUT pin determined by the body diode when the internal PMOS is OFF from 0.7 V down to 0.3 V.

Regards

/Peter