manju_gowda
New Member
Hi,
I have conducted test to obtain -5V using NCP3170 as explained in a link https://www.onsemi.com/pub_link/Collateral/DN05004-D.PDF (Figure 1)
In case 1: with input voltage 5V and without any output load I was able to get -5V .
In case 2: with 5V, and later test with 8V input voltage, if i place a load of 15 ohm or 100 ohm across the output I'm not getting the -5V, and the chip does not turn on switching. Instead I'm getting +2V or 0V. Changing the chip twice times yields the same result.
Please suggest potential causes and solutions to this problem.
I have conducted test to obtain -5V using NCP3170 as explained in a link https://www.onsemi.com/pub_link/Collateral/DN05004-D.PDF (Figure 1)
In case 1: with input voltage 5V and without any output load I was able to get -5V .
In case 2: with 5V, and later test with 8V input voltage, if i place a load of 15 ohm or 100 ohm across the output I'm not getting the -5V, and the chip does not turn on switching. Instead I'm getting +2V or 0V. Changing the chip twice times yields the same result.
Please suggest potential causes and solutions to this problem.
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