UCC27211: UCC27211 for High Side in always on Mode

Bjoern Stache

Part Number: UCC27211
Other Parts Discussed in Thread: PMP21529,

Tool/software:

Hello,

we saw the reference design PMP21529 for a 4-switch Buck-Boost Converter with the UCC27211. In the test report you write: If the Buck-Boost Converter is in Boost Mode, the High Side Switch is always on. How does this work this the UCC27211? The UCC27211 use bootstrap for the high voltage.

11 months ago

0 Rubas Khalid 11 months ago

TI__Expert 8771 points

Hi Bjoern,

This FAQ explains how you can use a charge pump for DC operation of high-side switch: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1330910/faq-how-to-bias-the-high-side-of-a-half-bridge-gate-driver-and-why

Thanks,
Rubas

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UCC27211: UCC27211 for High Side in always on Mode