TL7660: TL7660 VOUT

ALbert Tello

Intellectual 725 points

Part Number: TL7660

Iwoudl liekto ask the follwing questions:

From VIN =5V, Configuration "CombinedNegativeVoltageConversionandPositiveSupplyDoubling" dtasheet page 13 Figure 10

1) Is correct to assume in this configuration Vout+ = 10, Vout-=-10V ?

2) In the figure 10 -V= –(nV – Vdx) seems if VIN=5V , in this configuration -Vout = 5V ? IS correct ?

3) IS question 2 is corrrectassumption , the only way to have from VOUT+ =10V, Vout-=-10V from VIN = 5V , is to have two part in cascade ?

Regards

Albert

over 5 years ago

0 Youhao Xi over 5 years ago

TI__Guru 68495 points

Hi ALbert,

Thank you for your interests. Below are answers to your original questions:
1) No, it is not correct. Vout+=10V, and Vout- =-5V in the circuit of Figure 10.
2) Yes.
3) Yes, you can produce -10V from +10V obtained on the first device.

Thanks,
Youhao

0 ALbert Tello over 5 years ago in reply to Youhao Xi

Intellectual 725 points

hi Youhao,
Last question: from VIN = 5 volts, using TL7660 in cascade how can obtain
VOUT+=10V,
and
VOUT- =-10V
Which combiantions of figure can I apply
Albert

0 Youhao Xi over 5 years ago in reply to ALbert Tello

TI__Guru 68495 points

Hi ALbert,

There may be other ways, but the following should work:

(1) Use Figure 9 to produce +10V from your +5V input.
(2) Use the produced +10V as the input and use Figure 3 to produce -10V.

Thanks,
Youhao

0 ALbert Tello over 5 years ago in reply to Youhao Xi

Intellectual 725 points

Hi Youhao

Thank you for your answer I wil ltry to follow your suggestions.

I let yo uknow the resualts.

Albert

0 Youhao Xi over 5 years ago in reply to ALbert Tello

TI__Guru 68495 points

Hi Albert,

Thanks and let us know the result.

Best Regards,
Youhao

0 Youhao Xi over 5 years ago in reply to Youhao Xi

TI__Guru 68495 points

HI Albert,

Any update? Can I assume the issue is resolved? We are required to close the thread if no activity for a few days. You can always reopen it by a new post.

Thanks,
Youhao

0 ALbert Tello over 5 years ago in reply to Youhao Xi

Intellectual 725 points

Hi Youhao
Thank you very much , with two TL7660 I obtained the volatge resault, please close the case
Regards
Albert

0 Youhao Xi over 5 years ago in reply to ALbert Tello

TI__Guru 68495 points

Thank you Albert for the update. Good luck in your project.

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TL7660: TL7660 VOUT