Hello,
I have used TPS61236P in my design for charging external devices. I am having multiple queries which are mentioned below.
- Picture attached below is the PCB Layout for TPS61236P. Kindly review it.
2. Initially when the board was power up the output voltage was not 5V rather it was 3.2V. Couldn't figure what was the issue so I tried to change the inductor value. Recommended design suggests to connect a 1uH inductor so i did so in my design but the circuit wasn't functioning properly. So i replace the inductor with 4.7uH. Now the output voltages are raised to 5.9V ! So when I connect 4 resistors of 100Ohms in parallel the load current comes out to be 0.8A and the voltages are constant. But as soon as I connect a 2.5Ohm resistor in parallel with the previous load current immediately drops to 0.2A and voltage also drops to 0.9V. Don't know what is the most possible cause for this.
3. As mentioned earlier I have connected a resistive load so far. So when I connect a External device such as Mobile phone the output voltage of the TPS61236P increase from 5.9V to 6.12V ! but issue is that the phone doesn't picks up charging. May be this is due to insufficient supply of current. I don't know. Also inductor makes a loud noise once connected with the external device. Kindly assist me in this regard. Thanks
