TLV61047: Can TLV61047 be used to test Bode plots? Any data on PM and GM?

Hi,

You can test bode plot on TLV61047. But usually it's unnecessary because TLV61047 is a simple device and easy to use.

Below is 3.3V to 12V, load is 40Ohm, temperature is -40C. For your reference.

Hi Shipeng Cheng,

Thank you for your response and the detailed information regarding the TLV61047.

I would like to ask if it’s possible for you to provide the Bode plots under the following conditions:

• Vin = 5V, Vout = 24V
• Iload = 12.5mA and 125mA

In addition, could you kindly share the measurement methods or setup used to obtain the Bode plots?

I look forward to your reply. Thank you very much for your assistance and support!

Best regards,
CHIH CHI

Hi,

Could you share the project info? EE, volume, SOP time?

And you can learn how to measure bode plot from this document.

https://www.ti.com.cn/cn/lit/slup386

Hi Shipeng Cheng,

Attached are the circuit diagram and the measured waveform. For this setup (Vin = 5V, Vout = 24V, Iout = 0.125A), the gain margin (GM) is required to be less than -10 dB. However, our actual measurement indicates the following:

• Gain Margin (GM): -2.5 dB

Could you kindly provide suggestions or recommendations on possible modifications to address this issue?

Best regards,
CHIH CHI

Hi,

Please remove the C5. And use a pure resistor to act as load, don't use e-load.