Hi Darwin,
OK, I bought EVB tps23861 and MSP430 launch pad using MSP430G2553 MCU.
play and test with your EVB TPS23861EVM-612 with daughter board TPS23861EVM-613, in semi-auto mode. it ran great with time delay to turn on each port.
Then I remove the…
Hi Huseyin,
The detection waveform is acceptable since you probably didn't use a differential probe as the drain of PSE port is floating during detection stage. From the waveform I would guess the PSE turns off the port due to invalid MPS (maintain power…
Hi Jingheng,
We have tested with TPS23861EVM-612. If we only install one TPS23861 device on the board, we still can communicate with the device through default address (0x20 with A3 pin connected to ground) with PI commander GUI. There might be something…
Hi Zhangping,
Are you able to read PSE registers through I2C bus? If yes, can you dump all register values or at least registers 0x00, 0x03, 0x05,0x07,0x09,0x0B? If can perform I2C read in your system, I recommend you to use TPS23861EVM-612 and GUI to…
Hi Jerry,
Did you connect both A3 pins of two TPS23861 devices to GND? If that's the case, two TPS23861 devices have the same default I2C address. The easiest way is to connect one A3 to gnd and the other A3 to VDD. Then you can have 2 different default…
Hi AndongSun! The TPS23861 is capable of doing everything you list here through I2C communication.
1. Enable/Disable Ports and choose between AF/AT and select power levels:
Enabling and Disabling ports can be done by writing to the TPS23861's Operating…
Hi Hsu cheng,
TPS23861EVM-612 should be a good reference as it has 2 TPS23861 ICs on the board. TPS23882(8 channel 30W PSE) has been just released on TI.com and this is better for your customer's 16 port system. With TPS23882, less external components…
Hi Chris,
I would suggest to connect your load to TPS23861EVM-612 which will help you to isolate the problem. If TPS23861 can turn on the load without any power cycling issues, we will need to take a look at your schematic and layout. Thanks.
Best regards…
