LT8419

The LT8419 is a 100V half-bridge GaN driver that integrates top and bottom driver stages, driver logic control, and protections. It can be configured into synchronous half-bridge or full-bridge topologies, as well as buck, boost, and buck-boost topologies. The LT8419 provides strong current sourcing/sinking capability with 0.6Ω pull-up and 0.2Ω pull-down resistances. It also integrates a smart integrated bootstrap switch to generate a balanced bootstrap voltage from V_CC with a minimum dropout voltage.

The LT8419 provides split gate drivers to adjust the turn-on and turn-off slew rates of GaN FETs to suppress ringing and optimize EMI performance. Driver PWM input defaults to three-state and driver outputs default to low-state to prevent GaN FETs from false turn-on. The PWM input of LT8419 is TTL logic-compatible and controls two complementary outputs with user adjustable dead time of ~2ns, ~6ns, and ~10.5ns. The LT8419 performs with a fast propagation delay of 13.5ns and maintains excellent delay matching of 1ns between the top and bottom channels, making it suitable for high-frequency DC-DC converters, motor drivers, and class-D audio amplifiers. In addition, the LT8419 employs the WLCSP package to minimize parasitic inductance, enabling its wide use in high-performance and high-power density applications.

APPLICATIONS

• High-Frequency DC-DC Switching Power Converters
• Half-Bridge, Full-Bridge, Push-Pull Converters
• Data Center Power Supplies
• Motor Drivers, Class-D Audio Amplifiers
• Consumer, Industrial, and Automotive