UCC27211DR

The UCC27210 and UCC27211 drivers are based on the popular UCC27200 and UCC27201 MOSFET drivers, but with significantly improved performance. The peak output pull-up and pull-down currents are increased to 4A source current and 4A sink current, and the pull-up and pull-down resistances are reduced to 0.9Ω, enabling the drivers to drive high-power MOSFETs with minimal switching losses during the Miller plateau transition of the MOSFET. The input structure can directly handle -10 VDC, improving robustness, and can be directly interfaced with gate drive transformers without the need for rectifier diodes. These inputs are independent of the supply voltage and have a maximum rating of 20V. The switching node (HS pin) of the UCC2721x can handle up to -18V, protecting the high-side channel from the negative voltages inherent in parasitic inductance and stray capacitance. The UCC27210 (pseudo-CMOS input) and UCC27211 (TTL input) add hysteresis characteristics, enhancing the immunity to the interface with analog or digital pulse-width modulation (PWM) controllers. The low-side and high-side gate drivers are independently controlled, achieving a 2ns delay matching between their turn-on and turn-off. A bootstrap diode rated at 120V is integrated on the chip, eliminating the need for an external discrete diode. Both the high-side and low-side drivers are equipped with undervoltage lockout functions, providing symmetrical turn-on and turn-off behavior and forcing the output low when the drive voltage is below the specified threshold. Both devices are available in 8-pin SOIC (D), PowerPAD SOIC-8 (DDA), 4mm×4mm SON-8 (DRM), and SON-10 (DPR) packages.

Applications

• Power supplies for telecom, datacom, and commercial applications
• Half-bridge and full-bridge converters
• Push-pull converters
• High-voltage synchronous buck converters
• Two-switch forward converters
• Active clamp forward converters
• Class D audio amplifiers

Key features

• Drives two N-channel MOSFETs in high-side/low-side configuration via independent inputs
• Maximum bootstrap voltage 120V DC
• 4A sink, 4A source output current
• 0.9Ω pull-up and pull-down resistance
• Input pins tolerant of -10V to 20V regardless of supply voltage range
• TTL or pseudo-CMOS compatible input versions
• 8V to 17V VDD operating range (20V absolute maximum)
• 7.2ns rise time and 5.5ns fall time (with 1000pF load)
• Short propagation delay (typical 18ns)
• 2ns delay matching
• Symmetrical UVLO for high-side and low-side drivers
• Available in all industry-standard packages (SOIC-8, PowerPAD SOIC-8, 4mm×4mm SON-8, and 4mm×4mm SON-10)
• -40°C to 140°C rated temperature range