ISO5452: minimum voltage of FLT when high level

Shotaro Sakai

Intellectual 2750 points

Part Number: ISO5452

Hello team,

What is the minimum value of FLT pin when the output is high level?

Best regards,

Shotaro Sakai

7 months ago

0 Sasikala Thangam 7 months ago

TI__Expert 6550 points

Hi Shotaro-san,

FLT pin is tied to VCC internally and in the application as well, its pulled to Vcc externally with ~5K resistor - so the FLT pin voltage should be very close to VCC voltage.

0 Shotaro Sakai 7 months ago in reply to Sasikala Thangam

TI__Intellectual 2750 points

Hi Sasikala-san,

Yes, I understood.

My customer is asking leak current on FET because of FLT = Vcc - (Ileak x 5kΩ). Do you have any opinion on this value?

Best regards,

Shotaro

0 Sasikala Thangam 6 months ago in reply to Shotaro Sakai

TI__Expert 6550 points

Hi Shotaro-san,

If the FLT pin =GND, then the pull up current is 100uA as defined in the spec below.

But then if the FLT pin is high, then there is very minimal leakage current as the internal FET is open- the leakage current is very minimal. But then there is no spec defined for it.

Just curious, what is the customer system requirement of the leakage current?

Thanks

Sasi

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ISO5452: minimum voltage of FLT when high level