Hi
Can TPS43060 operate in Forced PWM mode?
Regards,
Koji Hamamoto
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Hamamoto-san,
It can be but it requires inserting an offset in the ISNS voltage by putting a larger resistor in series with the ISNS- pin. The trade off is the current limit is also reduced.
Some discussion of this in the following post.
http://e2e.ti.com/support/power_management/non-isolated_dcdc/f/196/t/341727.aspx
Best Regards,
Anthony
Hi
I have a question for this solution.
How can we add to a resistor to ISNS- pin. Should we add a resistor in series with the ISNS- pin except a sense resistor?
I need more detail about how to add a resistor.
Regards,
Koji Hamamoto
Hamamoto-san,
The resistor to modify would the 10 ohm R14 in Figure 34 on the datasheet. The resistor value will be ~400 ohms but should be checked in the final application. As mentioned earlier also make sure the maximum load current is evaluated.
Alternatively I should also mention the LM5121 or LM5122 has a mode pin that can be used to force CCM operation.
Best Regards,
Anthony
Hi Anthony-san
Thank you for your quick reply.
I already suggested LM5121 and LM5122 to the customer.
However before that,they would like to try adding the resistor and testing.
I will let you know if I get the feedback.
Regards,
Koji Hamamoto