BQ24630： Encountered a problem during the OCP test of IEC 62368-1 Ver 3

Jason Chien2

Prodigy 40 points

Part Number: BQ24630

Encountered a problem during the OCP test of IEC 62368-1 Ver 3

In terms of the attached Typical Application

EX, OCP should be Icharge = 3 A, 160% = 4.8A, but... How can this analog current be added to 4.8A to protect it?

over 4 years ago

0 Jason Chien2 over 4 years ago

Prodigy 40 points

Jason Chien2 said:

零件編號： BQ24630

在IEC 62368-1 Ver 3的OCP測試中遇到問題

根據所附的典型應用

 EX，OCP應為Icharge = 3 A，160％= 4.8A，但是...如何將此模擬電流加到4.8A進行保護？

NOTE:The test laboratory responded that the component cannot be changed including ISET set

0 Kedar Manishankar over 4 years ago in reply to Jason Chien2

TI__Mastermind 24075 points

Hi Jason,

Depending on charge current, the converter has an inbuilt cycle by cycle over-current protection, and current is monitored to to determine whether to stop switching or not. HSFET will be turned on and if current exceeds OCP, then we will switch off HIDRV to limit the current seen at the output of the switching converter.

0 Jason Chien2 over 4 years ago in reply to Kedar Manishankar

Prodigy 40 points

Hi Kedar

Thank you for your reply, but ISET will limit the charging current, how to simulate OCP without changing R5, R6, R7 & R8

Regards,

Jason Chien

0 Kedar Manishankar over 4 years ago in reply to Jason Chien2

TI__Mastermind 24075 points

Hi Jason,

Short the output to GND. The OCP will kick in to prevent overcurrent and you can observe the signals HIDRV, PH and inductor current to verify.

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BQ24630： Encountered a problem during the OCP test of IEC 62368-1 Ver 3