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 It was originally prepared for the LM10010 which was later superceded by the LM10011 which has higher precision.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…
Other Parts Discussed in Thread: TPS56121 art Number: TPS56121
Hi team,
Could you help me to find an appropriate value for inductor and loop compensation RC?
I'm trying to design TPS56121 in the operating condition of 10.8Vin, 5.5Vout, 2.8Aout…
Chris Jensen
Have you been able to make the changes Yuchang Zhang suggested?
Have they addresses your issue?
The TPS40077 controller uses the KFF pin to provide UVLO, Voltage Feed Forward and a maximum duty cycles. The low resistance on the…
Part Number: TPS544C25 Hi team,
I searched E2E and found there is a post related to my question as below.
https://e2e.ti.com/support/power-management/f/196/t/433191?tisearch=e2e-sitesearch&keymatch=tps544c25%2525252525252520calculation
But I didn…
Hi Etta,
The input capacitor value looks reasonable.
As for output capacitor and inductor, you can double check with this calculator tool
1033.TPS40KType III Loop Stability kVenable_sluc263c-071312.xls
As for layout i see a good placement for…
Part Number: TPS40170 The tool does not yield the correct compensation values. I attempted to verify if I was doing something wrong by using the values from the TPS40170 reference design, but the values calculated by the Tool don't match the results on…
Hi,
I have attached the circuit calculator with this design's component choices. I believe these choices should be stable.
What is the load current approximately when you plug in the module? Another thing to check is if the inductor. From the schematic…
