Hello littleBlue,

Yes, you can replace the DC/DC converters on the CGD1700HB2P-BM2 gate driver with different isolated DC/DC converters in the same case/package (7-SIP with 5 Leads). This is common when users want to evaluate the module performance with different gate voltage biases. However, when changing the converters, it is still important to consider the following:

• The converter must have suitable isolation for the target bus voltage since it bridges the isolation barrier (see PRD-09301 for more information). The MGJ2D121509SC converter you identified is a suitable replacement from an isolation standpoint.
• Operating SiC power modules outside of the rated gate voltages can degrade the lifetime. Many BM2 power modules (which this gate driver is design to support) such as the CAS300M12BM2 are rated for output gate voltages of -5 V / +20 V (with maximum ringing/overshoot ratings of -10 V / +25 V). The MGJ2D121509SC does not create the correct static output voltages, so this should be considered when deciding whether to make the modification.
• If you want further control over the negative gate voltage, you can depopulate RB14 and RB15 then populate UB1, UB2, and their surrounding circuitry in order to adjust the negative gate voltage. The default resistor values are selected to create a -4 V rail, but the values can be varied to fine tune the negative output voltage.

Thanks,

Chris N.