Other Parts Discussed in Thread: TL431 , UCC28911 , LM25037 Hello,
I am trying to find measure the Bode Plot of a 12W Flyback converter made from Viper27 IC. It has an integrated MOSFET and controller.
I want to know the phase margin at the crossover…
Part Number: TPS7A47-Q1 Other Parts Discussed in Thread: TPS7A47 Tool/software: Hi team,
I want to perform BODE analysis on the following circuit using TINA.
This circuit uses TPS7A47-Q1 as an LDO regulator and connects it in parallel with an NMOS…
Hello Xiaowei,
In order to test this on hardware, you will need a spectrum analyzer or a bode analyzer. The test setup and process is described in the following document: www.ti.com/lit/an/sluaa51/sluaa51.pdf
What equipment do you have available to…
Hi Conor,
At TI, we recommend using the Bode 100 Vector Network Analyzer . We typically tune our control loop with this product. Omicron has a good app note to get started: https://www.omicron-lab.com/applications/detail/news/dcdc-converter-stability…
Hi Conor,
See my response to your other post: UCC28070: Inquiry on Tools for Phase/Gain Margin Verification of UCC28070 . I recommend the Bode 100 Vector Network Analyzer for control loop tuning.
Regards,
Jonathan Wong
Hi Ken,
Ken Zhang said: A my account wants to know how to measure the open loop gain of tl082. which equipment are used in TI for open loop gain measure? any recommendation equipment for open loop gain measure?
This is one of the technique to simulate…
Hello Sundy,
1) As mentioned in the datahsheet, it should not exceed the recommended effective Cout mentioned in D/S: if it is exceeded, please make sure loop stability has been analyzed. section 10.2.2.3 explains that, you need to test SW node, inductor…
Hello Ando,
LM51770EVM-HV has the right injection and measuring component populated. If you have a look at the schematic in the user's guide, right above the IC, you can find JP6 pins 1 and 2 as well as R45 for this.
At the end, we inject and measure…
Hi Reuben
When Vin<3.3V, the converter shut down due to the VIN UVLO set, when Vin>3.6V, the converter switches again.
"What happens between 3.3V and 6V"--- The device operates under dropout mode.
The 50 Ω is for bode plot measurement: Power Tips…
Hi Siv,
I believe the EVM default schematic is for 2.2MHz and 5V output only. The compensation network is already connected in COMP pin.
To measure bode, follow the above suggestion.
For other circuit conditions, you can use the excel tool to design…
