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19852 Posts in 1275 Topics by 5182 Members - Latest Member: charbuild March 29, 2024, 03:57:40 AM
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Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: TPS3700 pullup resistor
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Author Topic: TPS3700 pullup resistor  (Read 4832 times)

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Offline shandy27

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TPS3700 pullup resistor
« on: September 20, 2015, 07:11:44 PM »
right folks this is a bit embarassing does anyone have any experience of selecting a pullup resistor for a tps3700 i'm don't know how to do the equation in the datasheet, not wanting someone to do the work for me i am just needing some guidance.
thanks
graeme

Offline david4500

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Offline shandy27

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Re: TPS3700 pullup resistor
« Reply #2 on: September 21, 2015, 07:44:52 PM »
cheers thats perfect, if i wanted to have the output going to a 555 timer would i just keep the pullup the same?

Offline david4500

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Re: TPS3700 pullup resistor
« Reply #3 on: September 21, 2015, 10:59:51 PM »
Yeah.

You'll have to output of the tps going to the 555 reset pin correct?

For the tps, were you able to configure your under voltage (and/or over voltage) using a voltage divider alright?
« Last Edit: September 21, 2015, 11:09:32 PM by david4500 »

Offline shandy27

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Re: TPS3700 pullup resistor
« Reply #4 on: September 22, 2015, 08:14:30 AM »
i've got the divider calculated for undervoltage.
i was going to have the tps cut power to the vcc pin. it's being set up for a 4s pack with a cutoff at 13.6v, I was going to connect an npn transistor to output A, then to the vcc pin of the timer.
« Last Edit: September 22, 2015, 09:29:55 AM by shandy27 »

Offline david4500

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Re: TPS3700 pullup resistor
« Reply #5 on: September 22, 2015, 07:57:07 PM »
Nice!

Offline shandy27

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Re: TPS3700 pullup resistor
« Reply #6 on: September 23, 2015, 03:26:53 AM »
Thanks for your help  :)

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