TPS628512:電源電圧のリップル範囲について

keisuke.iwata

Other Parts Discussed in Thread: TPS628512

部品番号: TPS628512

データシートを見ています。

図 10.43 の出力電圧リップルで Vin=3.3V、Vout=1.2V の時のリップル範囲を教えてください。

チャットでの回答が得られず、ここで質問するように言われました。

over 1 year ago

0 Varun John over 1 year ago

TI__Genius 14680 points

Hi,

Can you please post your question in English?

Best regards,

Varun

0 keisuke.iwata over 1 year ago in reply to Varun John

Prodigy 10 points

I'm looking at the datasheet.

Please let me know the ripple range when Vin=3.3V, Vout=1.2V in the output voltage ripple of Fig. 10.43.

I didn't get an answer on chat and was told to ask here.

0 Varun John over 1 year ago in reply to keisuke.iwata

TI__Genius 14680 points

Hi,

Output ripple is dependent on the amount of output caps and parasitic of these caps. You can configure the BOM using our WEBENCH tool and check the expected ripple: https://webench.ti.com/power-designer/

I've attached an example design with COUT = 2 × 22uF and the ripple was 1.21mV for 2A load.

WBDesign TPS62512.pdf

Best regards,

Varun

0 keisuke.iwata over 1 year ago in reply to Varun John

Prodigy 10 points

Mine uses two 10uF capacitors.

Please tell me the range of ripple value.

ex.
20mV~30mV

0 Varun John over 1 year ago in reply to keisuke.iwata

TI__Genius 14680 points

Hi,

The ripple is 2.53mV for 0 to 2A in FPWM mode and 37.52mV in PFM mode with COUT = 2 × 10uF.

Best regards,

Varun

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TPS628512:電源電圧のリップル範囲について