TPS563252: Converting a Buck to an Inverting Buck-Boost

Allen yang

Intellectual 595 points

Other Parts Discussed in Thread: TPS563252

零件號碼： TPS563252

工具/軟體：

大家好，

下圖為輸出負電壓設計

設計輸出電壓調節範圍-3V~-0.6V

1.這個電路設計有問題嗎？

2. 可以使用Vcom電壓動態調諧電路嗎？

VCOM_ADJ 是 MCU DAC 輸出。

3. EN 腳會動作錯誤嗎？

當Vin=4.2V時，VCOM_EN_H為低電位

6 months ago

0 Lucia Gao 6 months ago

TI__Mastermind 25890 points

Hi Allen,

Did you test the schematic with the board and see any issue or the board has not built but you would like a schematic review from our side?

Thanks!

BRs

Lucia

0 Allen yang 6 months ago in reply to Lucia Gao

Intellectual 595 points

Hi Lucia,

The board has not built

Please help with schematic review

Thanks

0 Allen yang 6 months ago in reply to Lucia Gao

Intellectual 595 points

MCU DAC output=0V~1.8V

0 Allen yang 6 months ago in reply to Lucia Gao

Intellectual 595 points

MCU DAC output=0V~1.8V

0 Lucia Gao 6 months ago in reply to Allen yang

TI__Mastermind 25890 points

Hi Allen,

I will give you my review comments by end of today. Thank you!

BRs

Lucia

0 Lucia Gao 6 months ago in reply to Lucia Gao

TI__Mastermind 25890 points

HI Allen,

What is the target output voltage range? From the schematic, it shows Vout =-2V. However, the range shows -0.6V ~ -3V. So that you need Vout min with -3V and Vout max with -0.6V, right?

BRs

Lucia

0 Lucia Gao 6 months ago in reply to Lucia Gao

TI__Mastermind 25890 points

Hi Allen,

I have an offline discussion with Terry about my comments. And you can talk with him. Any further concern, feel free to let us know. Thank you!

BRs

Lucia

Power management

Power management forum

TPS563252: Converting a Buck to an Inverting Buck-Boost