Slave card MC33775A

[Prahlad1208]

Dear Foxbms Team,
We are applying 14 cell voltages in slave cards MC33775A.
TPL low signal applied as an input signals through interface MC33664A in Pin no 45 and 46. but TPL High as an output do not give any output signals in pin no. 47 and 48.

Regards
Prahlad

[Prahlad1208]

Dear Foxbms Team,

Pins 47 and 48 provide signals when we apply an external 12 volt supply for Vbat and 5 volt supply for VDDC and VDDIO.
MC33775A is unable to control the VDDC_DRIVE signal to the external BJT MJD31CAJ, which is required in order to supply 5 volts from pin 42 of MC33775A to the external BJT.

Any solution for VDDC and VDDIO without applying external 5 volt signal.

Best Regards,
Prahlad

[foxBMS]

Dear @Prahlad1208,

are you using the latest release of the NXP MC33557A-based foxBMS BMS-Slave (version 1.0.0, https://iisb-foxbms.iisb.fraunhofer.de/foxbms/gen2/hardware/release/).

This BMS-Slave works in combination with NXP MC33664-based BMS-Interface (version 1.0.2, available at the same link).

Which software version of foxBMS 2 are you using?

Best regards,
The foxBMS Team