Part Number: TPS40422 Tool/software: Hi expert,
Customer used TPS40422 for 12Vin to 0.88Vo/40A and use the calculation tool for compensation but find the phase/gain margin is not good.
Would you please advise how to adjust the stability?
TPS40KType…
Other Parts Discussed in Thread: TPS40400 , TVP5158 DM8168 reboot fail when install TI driver. The fail probility is 2%.
Attached console's message, and seems dead when install the M3 driver.
Please give us a hand.
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Other Parts Discussed in Thread: TPS40400 , PMP , TVP5158 Hi folks, I am a beginner with the DaVinci and in this forum. We are using a UdWorks DM8168 Rev. 05B platform with software DVRRDK_01_09_00_19. Our development platform is a Ubuntu 10.04 running…
Hello,
There is a DVR equipment in our laboratory which is bought about 4-5 years ago. But somehow there is not any technical detail documents nor source code about this equipment.
We are trying to run it; but it doesn’t work. From serial port output…
Hi all,
I am using the ubifs file system to boot the kernel and setting the environment variables as below
bootcmd=nand read ${logoreadaddr} 0x280000 0x300000;logo on
${logoreadaddr} 0xA0000000 0x81600000 40 60;nand read 0x81000000 0x00580000…
Ramgopal,
Your assessment of the bulk decoupling required is correct. You must calculate the required amount and validate it. The Hardware Design Guide (SPRABI2) discusses this calculation.
This bulk capacitance will affect the control loop on the…
SI,
Please see the attached presentation. It was originally prepared for the LM10010 which was later superceded by the LM10011 which has higher precision. Please also see the many E2E posts discussing the LM10011 and TPS56121 with C667x and C665x. …
Denny Huang
The schematic looks better now.
Looking at the compensation spreadsheet, I had to change the part number to TPS40077, and after doing do, I noticed that the phase margin at the L-C resonance is very low. Looking into why, I can see…
Amir Eshraghi
I took a look at the compensation. It is certainly conservative for a 1.2MHz switcher, but I don't see any issue. I have attached the Excel spreadsheet with the loop analysis. TPS40KType III Loop Stability kVenable_TPS40305.xls
So…
Noman Paracha
The 2x 15uF tantalum capacitors are not strictly needed by the TPS546C23, but may be helpful in decoupling dynamic loading on VIN from other supplies, or distribution drops on your 12V supply rail, it depends on your system requirements…
