TPS1HB08-Q1: Setting variable current limit.

Don Edvalson49

Part Number: TPS1HB08-Q1

The data sheet describes setting the current limit using a 5K - 25K resistor. Is it feasible to connect this through a resistor to an D/A converter to allow this to be variable by software control?

Thanks,

Don

over 5 years ago

0 Cameron Phillips over 5 years ago

TI__Genius 12410 points

Hello,

The capacitance on the line needs to be kept to a minimum because it will effect the performance. However in theory this would work.

0 Don Edvalson49 over 5 years ago in reply to Cameron Phillips

Prodigy 230 points

Hi,

The data sheet calls for a resistor to VBB. Since VBB is a high voltage I am guessing that the external resistor forms half of a voltage divider or perhaps it is just a current source.

Is any further information available on what is expected on this pin in terms of current / voltage?

Thanks,

Don

0 Cameron Phillips over 5 years ago in reply to Don Edvalson49

TI__Genius 12410 points

Don,

It is not a straight resistor divider. However, I will need to check to see how much of the circuit I can comment on.

Here is an app note that we put out about the current limiting feature of our devices.

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TPS1HB08-Q1: Setting variable current limit.