TPS61169/boost converter

Tsukui Yusuke

Guru 21930 points

Other Parts Discussed in Thread: TPS61169, TPS61170

Hi,

Could you tell me about how to use TPS61169.
Can I use TPS61169 as Boost converter?
Customers want to use this device as a boost converter.
Applications is the phantom power.

Could you give me your advice?

Best Regards,
Yusuke/Japan Disty

over 9 years ago

0 Tsukui Yusuke over 9 years ago

Guru 21930 points

Hi,

Can I get the information?
If you need more information or if I should clarify my comment ,
please let me know.

Best Regards,
Yusuke/Japan Disty

0 Randy Dahl over 9 years ago in reply to Tsukui Yusuke

TI__Intellectual 2090 points

Hello Yusuke

Yes, the TPS61169 could be used as a boost converter depending on the output accuracy requirement.
Can you send me the specifics on this application?

Best regards,
Randy

0 Tsukui Yusuke over 9 years ago in reply to Randy Dahl

Guru 21930 points

Randy-san,

Thank you for your support.
Customers want to achieve the following circuit.
(TPS61170→TPS61169)
Can I use the TPS61169 in this circuit?

Best Regards,
Yusuke/Japan Disty

0 Randy Dahl over 9 years ago in reply to Tsukui Yusuke

TI__Intellectual 2090 points

Yusuke-san

The TPS61169 can not support this application because the Maximum VIN is 5.5V.
Unfortunately, I do not know who can help you with the TPS61170.

Best regards,
Randy

0 Tsukui Yusuke over 9 years ago in reply to Randy Dahl

Guru 21930 points

Randy-san,

Thank you for your response.
Is it possible if Vin(max)=5.5V, then support this application?
Could you give me your advice?

Best Regards,
Yusuke/Japan Disty

0 Randy Dahl over 9 years ago in reply to Tsukui Yusuke

TI__Intellectual 2090 points

Hello Yusuke-san

The VREF voltage in the TPS61169 is 204 mV typ so the equation would be Vo = 0.204 X (R1+R2)/R2. This would make R1 ~2.4M ohm for 48V output. It would be better to change R2 to 1K so R1 is ~240K. The part to part variation of VREF would result in an output that could vary from 43 V to 52V.

Best regards,
Randy

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TPS61169/boost converter