Other Parts Discussed in Thread: TPS61222, TPS7A03, TPS7A02
Hi, Support Team
A circuit was formed by combining the TPS78230 and TPS61222.
However, a problem has occurred, so we will contact you as follows.
First of all, please review the suitability of the configured circuit.
This is a problem that occurred in the circuit configured as in the circuit diagram above.
Problem 1. During PBA inspection, the TPS78230 OUTPUT LEVEL drops to 0.3V.
If C49 and C50 in the circuit diagram are removed, OUTPUT LEVEL is normally output as 3.0V.
What is causing the problem?
And what is the relationship between the TPS61222's IN/OUT CAPACITOR?
We will inform you of additional confirmed matters.
By separating each OUT/IN of the TPS78230 and TPS61222, it was confirmed that each output (3.0V / 5.0V) is normally output during a single test.
In case of malfunction, it has been confirmed that there is a defect and a solution to the defect according to the capacity value of C42.
C42: 1uF-defect occurred
C42: 2.2uF-defect occurred
C42: 4.7uF-Normal operation and bad operation are mixed.
C42: 10uF-normal output