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# TPSM53602: About VOUT variable external circuit

Part Number: TPSM53602

Hi Team,

We would like to change the output voltage of TPSM53602 by external DAC at the following conditions.

Then, we would like to know the suitable external resistor value(R1,R2,R3).

Could you please let us know if you have any information and advice?

[Conditions]

VIN=24V

VOUT=2V to 7V

IOUT=1A

VDAC=0.2V to 3V

Regards,

Hide

• Hi Hide,

To change the output voltage dynamically from 2V to 7V using the VDAC voltage range of 0.2V to 3V, use the following R values:

R1=10kΩ, R2=2.18kΩ, R3=5.62kΩ

Let me know how this works for you or if you have other questions.

Regards, Jason

• Hi Jason-san,

Could you please let us know a formula?

We would liket to know VDAC level for VOUT.

-VDAC xxV, VOUT=2V

-VDAC xxV, VOUT=5V

-VDAC xxV, VOUT=7V

Regards,

Hide

• Hide-san,

VOUT=2V, VDAC=3V

VOUT=5V, VDAC=1.3V

VOUT=7V, VDAC=0.2V

VOUT = 1V + 10kΩ*[(1V/2.18kΩ)+((1V-VDAC)/5.62kΩ)]

Regards, Jason

• Hi Jason-san,

Thank you for kind support and detail information.

I understand that "1V" in a formula is typical Feedback voltage of this device.

Regards,

Hide