Hi team,
Can the customer configure like below to output 13V with 12V fixed output version?
Is they can do like this, is there any advice that the customer should care about?
Regards
Ohashi
Hi Ohashi,
This method is not recommended. Because the resistance inside the chip will change during high and low temperature experiments, but the voltage division ratio is fixed. The change of this resistance is inconsistent with the change of the resistance value of the externally added series resistance, which may cause changes in the output voltage. It is recommended to choose a chip with adjustable output voltage.
In addition, generally if the original fixed output voltage is to be changed, secondary voltage division will be performed at the output voltage. The circuit is shown in the figure below. In order to ensure the output voltage accuracy. R3 is generally 1% of R1. But because the internal resistance of LM2596 is too small, this method is not suitable for this chip.
Hope this can help you. Thanks.
Aurora
