DCP010507DB: Compatible device with 3.3v

Ohad Fundoianu

Intellectual 380 points

Part Number: DCP010507DB
Other Parts Discussed in Thread: LM2775

Tool/software:

Hello,

We consider use DCP010507DBP for power isolation for ECG board.

Do you have such Isolator but for voltage 3.3v ?

What is its Turn Ratio ?

Does it include LDO inside ?

Thanks,

Ohad

over 1 year ago

0 Youhao Xi over 1 year ago

TI__Guru* 78755 points

Ho Ohad,

Thank you for reaching out. Please take a look at DCR family: https://www.ti.com/lit/gpn/dcr011203. There are 3.3Vout versions for different Vin range.

Yes it has LDO inside. Turns ratio is not disclosed.

Hope this helps.

Regards,

Youhao

0 Ohad Fundoianu over 1 year ago in reply to Youhao Xi

Intellectual 380 points

Hi Youhao,

The series of Isolator you suggest here enable only 5v input. I need a one which enable 3.3v input, 3.3v output => Isolation of 3.3v, can you recommend ?

Ohad

0 Youhao Xi over 1 year ago in reply to Ohad Fundoianu

TI__Guru* 78755 points

Hi Ohad,

Sorry I haven't found anything like that in our product line's portfolio. Could the customer use a charge pump device to raise the 3.3V to 5V then use the DCR or DCP device to produce the isolated 3.3V?

Thanks,

Youhao

0 Youhao Xi over 1 year ago in reply to Youhao Xi

TI__Guru* 78755 points

Hi Ohad,

Any feedback? I mean LM2775 charge pump. It can boost the 3.3V input to 5V regulated, then feed the 5V rail to the DCR/DCP inputs. The LM2275 is a small device just require two more capacitors (DCR/DCP capacitor can serve as the charge pump output capacitor). Its a small addition to their board. See below info.

Regards,

Youhao

0 Youhao Xi over 1 year ago in reply to Youhao Xi

TI__Guru* 78755 points

Hi Ohad,

May I close the thread because there is no activity for about 2 weeks? You are welcome to reopen it by add a new post,

Regards,

Youhao

Isolation

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DCP010507DB: Compatible device with 3.3v