BQ51222: Voltages values of ad-en not

Hi Jonathan

The AD-EN NOT pin E3 will pull low when active.  But the pin also has a clamp circuit to limit the voltage difference between AD and AD-EN NOT (see AD_EN-ON) specification.

Hi Bill, 

Kindly help to share more details.  If we don't have the exact values kindly share the formula that represents the relationship between other voltages and the (AD-EN NOT) PIN.

Thank you in advance. 

Best regards,

Jonathan

Hi Jonathan

The AD-EN NOT pin is controlled by AD pin.  When AD is greater that 3.6V the AD-EN pin is pulled low.  Votlage across the P-channel is MOSFET gate will be Adapter Input (AD) to Gnd (AD-EN).  

The AD-EN pin has a clamp circuit that will limit voltage across the MOSFET gate to 6V, Adapter input (AD pin) to AD-EN pin. See V-AD_EN-ON spec and also see section 8.3.5.

Hi Bill,

Thank you once again. Customer is still looking for the voltage that the AD-EN NOT  when the adapter is not attached. So when the P-channel FET is open.

Please help. 

Best regards,

Jonathan

I will contact you and we can work this off-line

Hi Bill,

Thank you. Kindly check your mail.

Best regards,

Jonathan