ADP5061 default current limit

Question

Hello everybody, I use the ADP5061 as battery management IC on a prototype. The board is powered via USB-C with a fixed configured current limit of 3A. The VINx current limit feature of the ADP5061 is therefore not required. My system draws a current peak of 1.2A for 500us at bootup. The default current limit feature of the ADP5061 limits the current to 500mA, preventing the host controller from booting. (ADP5061ACBZ-2-R7 DIG_IO1 = High ) As a result, the ADP5061 cannot be configured for a higher limit, as the I2C connection is not yet established. 
 Is there a workaround for this deadlock constellation that requires no additional components? For example a higher default current limit? The planned product does not run in high quantities (in the hundreds of pieces) therefore a factory programming is probably not worthwhile. I would not like to use a new IC, as I am otherwise very satisfied with the performance. 
 Many thanks!

ADIApproved · Accepted Answer

Hi Lukas, 
 Unfortunately, none of the default factory options allow a higher input current limit. It does seem like an oversight given your problem here. 
 I can't think of a good way to work around this without any additional components. The only option I see is to bypass the chip during startup. You could do this with a FET path which is turned off by the system right after the higher current limit is written to the chip. 
 
 Regards, 
 Zack)

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ADP5061 default current limit