SLUSCO1B June 2017 – July 2024 UCC27212
PRODUCTION DATA
The UCC27212 device is designed to drive both the high-side and low-side of N-Channel MOSFETs in a half- and full-bridge or synchronous-buck configuration. The floating high-side driver can operate with supply voltages of up to 120V, which allows for N-Channel MOSFET control in half-bridge, full-bridge, push-pull, two-switch forward, and active clamp forward converters.
The UCC27212 device feature 3.7A source and 4.5A sink capability, industry best-in-class switching characteristics and a host of other features listed in Table 6-1. These features combine to ensure efficient, robust and reliable operation in high-frequency switching power circuits.
| FEATURE | BENEFIT |
|---|---|
| 3.7A source and 4.5A sink current | High peak current ideal for driving large power MOSFETs with minimal power loss (fast-drive capability at Miller plateau) |
| Input pins (HI and LI) can directly handle –10VDC up to 20VDC | Increased robustness and ability to handle undershoot and overshoot can interface directly to gate-drive transformers without having to use rectification diodes. |
| 120V internal boot diode | Provides voltage margin to meet telecom 100V surge requirements |
| Switch node (HS pin) able to handle –(24 – VDD) V maximum for 100ns | Allows the high-side channel to have extra protection from inherent negative voltages caused by parasitic inductance and stray capacitance |
| Robust ESD circuitry to handle voltage spikes | Excellent immunity to large dV/dT conditions |
| 20ns propagation delay with 7.2ns rise time and 5.5ns fall time | Best-in-class switching characteristics and extremely low-pulse transmission distortion |
| 4ns (typical) delay matching between channels | Avoids transformer volt-second offset in bridge |
| Symmetrical UVLO circuit | Ensures high-side and low-side shut down at the same time |
| TTL optimized thresholds with increased hysteresis | Complementary to analog or digital PWM controllers; increased hysteresis offers added noise immunity |
In the UCC27212 device, the high side and low side each have independent inputs that allow maximum flexibility of input control signals in the application. The boot diode for the high-side driver bias supply is internal to the UCC27212. The UCC27212 is the TTL or logic compatible version. The high-side driver is referenced to the switch node (HS), which is typically the source pin of the high-side MOSFET and drain pin of the low-side MOSFET. The low-side driver is referenced to VSS, which is typically ground. The UCC27212 functions are divided into the input stages, UVLO protection, level shift, boot diode, and output driver stages.