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Hi Team
customer is validating the TPS259270 with TPS259230-41EVM, there are two issues reported:
1. When soldering different pcs of TPS259270 to the EVM, the I_limit performance is different varies between 3.8A to close to 5A
2. It makes no differences of I_limit when changing the resistor connected to ILIM pin.
Is there anything should be paid attention to make the EVM run properly?
Thank you
best regards!
Joe
Hi Joe,
(I will take over the support from Rakesh)
When we perform current limit test, the internal FET goes into saturation region and act like a constant current source. When you apply a CC load, that is like connecting 2 current sources in series which creates error in test.
Instead, we recommend using CR mode of e-load. This prevents that issue.
Did they try regular start-up. Is the device starting up fine? Also please check with the customer regarding these questions
What is the input test voltage ?
Have you replaced U1 or U2 with TPS259270 ? Please use resistive load or e-load in CR mode for evaluation.
Can you test waveform of VIN, EN/UVLO, Vout and Iout
Best Regards,
Arush