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Synchronous gate driver (TPS28226) v.s. General gate driver(UCC27211)

Intellectual 1060 points

Replies: 3

Views: 99

Hi team, 

Could you please kindly suggest what is the main difference between Synchronous gate driver (TPS28226) and General gate driver(UCC27211)? Please also kindly provide the comparison table, thanks a lot!

 

http://www.ti.com/lit/ds/symlink/tps28226.pdf    Synchronous gate driver

http://www.ti.com/lit/ds/symlink/ucc27211.pdf   general gate driver

BR, 

Sean Liao

  • Hi, Sean,

    The TPS28226 was designed to be used in synchronous buck converter applications - basically, where you replace the diode in the buck converter with an active switch to improve efficiency (you size the mosfet to have the rds*id to be less than the forward drop of a diode).

    We have two new parts, UCC27282 and LM5108. You might want to look at those.

    If you can share more details, we can help you select the best driver. Feel free to drop us an email with more details.

    Best regards,

    Don Dapkus

    Gate Driver Applications

    Dallas, TX USA

  • In reply to Don Dapkus:

    Hi Dapkus, 

    So, do you mean synchronous gate driver typically use for 2 MOSFET (high-low side), and general gate driver use for MOSFET+diode?

    Thanks a lot!

    BR, 

    Sean Liao 

  • In reply to Sean Liao (Yu-Sheng):

    Hello Sean,

    Thank you for the interest in TI half-bridge gate drivers. The main difference in the TPS28226 synchronous half bridge driver driver and the UCC27211 half-bridge driver is in two areas. The TPS28226 is rated at lower BOOT (or HB) voltage of 33V Vs the UCC27211 is rated at 120V HB voltage. So the input voltage requirements of the converter is a major consideration.

    Also the TPS28226 is a single control signal input to control the high side and low side driver. The high side driver follows the PWM input polarity, and the timing of the LO driver is a complement (inverted) polarity with a fixed dead time during the switching transitions. The UCC27211 specifically has two independent inputs and the high side driver and low side driver is controlled by the two control inputs.

    If the UCC27211 is a good fit for the application, there is a new driver with improved timing and added features which is the UCC27282. The UCC27282 includes a feature where the low side and high side driver is prevented from both being high at the same time, even if both inputs are high. The dead time will need to be controlled externally however.

    Below is a table of the 3 drivers.

    Confirm if this answers your questions, or you can post additional questions on this thread.

    Regards,

    Richard Herring

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