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Part Number: TPS65094
Please check TPS650941 circuit which is designed by my customer.
Conditions Vin = 6V and Vin = 12V
After downloading firmware, board power on make CH4 damage.
The pin24(PVIN4) become to 0 ohm. ( short to GND )
If enable CH3, the chip is not working
If not use the CH3 and CH4, the chip work normally with other channels.
Please help us to check what's problem.
Attached files are circuit and PCB layout.
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In reply to Jayanth Kruttiventi:
Hi Jay :
We checked the schematic several times.We didn't find any problem.You say "it looks like FBVR4 is labeled FB2"means the schematic shown below ???If it is true, R36 open make FB4 dosen't connect to FB4_O.
I think is PMIC issue. Is it possible the problem comes from soft?The soft download from TI link, right ?http://www.ti.com/tool/ipg-ui
In reply to Terry Tseng:
In reply to user5165638:
In reply to Nick Jakse49:
1 yes FBVR4 connection is ok
2 The c4 ,c6,c20 and c5 are ok
3 There is no switching signal with lx3
4 The pgnd_buck3 and pgnd_buck4 are drew in the block diagram of tps65094x
5 when enable buck3., the Other bucks arenot working ( include buck1,2,,5,6)
6 when 3 channel buck is not enabled , the buck 1.2..5 are ok
7 when the initial code downloaded .The channel 4 buck is enabled for some seconds ,then the 4 buck is always short . so two boards are burned off with the chip , . We must cut the buck4 input power trace with other boards
6 can you send the tps65094x initial code to us . we want to compare it with our code
1 According to the spec ,write the registers ,Because other bucks are good ,but the 3 buck and 4 buck .are bad What is the writing register sequence for tps65094*? please send it to us
2 There are no read button and IPG_UI ,can you send the initial code of TPS65094* to us? or you can download the dump registers from the IPG_UI to us ?
thank you .
There isn't a default register writing sequence. The registers are written during manufacturing to default settings that should be there as soon as the device is turned on. Just in case there is an issue I took one of our EVMs, read all of the registers and put them into a register dump for you to compare to your device.
I also put these registers into a project file so you can open this project, and then click "write all" to set all of your device's registers to the default values.
To send us a file with your register dump you can follow the pictures below.
1The *.txt file is about the tps65086? Whether does the tps65086 comptabile with the TPS65094?
2 we checked the register ,which mee the spec .
can you send the TPS65094"S setting to us ?
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