UCC29002: UCC29002

ghasem aghdam

Part Number: UCC29002

Hi there,

According to UCC29002 datasheet, if output voltage of the module is greater than the VDD range of the UCC29002, it needs to use the RBIAS1, RBIAS2 resistors and the NPN transistor.

For example, if the output voltage of modules is 48 V, it is reasonable to have 1.0 kΩ and 3.3 kΩ resistors for RBIAS2 and RBIAS1 respectively. It will give bias voltage around 11.16 V that is absolutely in the operating range. Is it correct?

How should we choose a correct NPN transistor?

Looking forward to hearing from you.

Thanks & BR,

Ghasem

over 6 years ago

0 Teng Feng over 6 years ago

TI__Genius 13660 points

Hi ghasem,

Yes, you are right. The recommended maximum operating voltage is 13.5 V. It is reasonable to use 1.0 kΩ and 3.3 kΩ resistors for RBIAS2 and RBIAS1 to regulate VDD at 11.16V.
Please select a NPN transistor, whose Collector-Emitter (Vceo) should be large than output voltage (48V), and collector current- continuous (Ic) should be large than 6mA. Besides, it is also ok to use a N-channel D-MOS.

Regards,

Teng

0 ghasem aghdam over 6 years ago in reply to Teng Feng

Intellectual 455 points

Hi Teng,

Thank you very much for your support.

BR,

Ghasem

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UCC29002: UCC29002