UCC27322-EP: output status with VCC below min spec?

FRANCISCO ROMO

Prodigy 180 points

Part Number: UCC27322-EP

Hello, is the output pin state defined for VCC below min operating 4.5V?

over 4 years ago

0 Mamadou Diallo over 4 years ago

TI__Genius 13445 points

Hello Francisco,

The UCC27322-EP is defined for 4.5V < VCC < 15V rail-to-rail operation.

Using the driver IC outside of the recommended operating conditions might impact the driver's switching behavior and/or performance.

Regards,

-Mamadou

0 FRANCISCO ROMO over 4 years ago in reply to Mamadou Diallo

Prodigy 180 points

Understood. My question is whether the output is floating or in what state during power up or power down when Vcc is less than 4.5? Wish it had an undervoltage lockout feature but it does not appear to be the case.

0 Wei Zhang over 4 years ago in reply to FRANCISCO ROMO

TI__Intellectual 2061 points

Yes, I checked the datasheet, and it doesn't have an UVLO protection block.

However, Figure 23- Figure 26 from the datasheet will give you a lot clue on what happened during VDD power up and power down.

Best regards,

Wei

Power management

Power management forum

UCC27322-EP: output status with VCC below min spec?