GENERAL DESCRIPTION

The LT8418 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, full-bridge topologies, or buck, boost, and buck-boost topologies. The LT8418 provides strong current sourcing/sinking capability with 0.6Ω pull-up and 0.2Ω pull-down resistance. It also integrates smart integrated bootstrap switch to generate a balanced bootstrap voltage from VCC with a minimum dropout voltage.

The LT8418 provides split gate drivers to adjust the turn-on and turn-off slew rates of GaN FETs to suppress ringing and optimize EMI performance. All driver inputs and outputs have default low-state to prevent GaN FETs from false turn-on. The inputs of the LT8418, INT, and INB are independent and TTL logic compatible. Meanwhile, the LT8418 performs with a fast propagation delay of 10ns and maintains an excellent delay matching of 1.5ns 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 LT8418 employs the WLCSP package to minimize parasitic inductance, enabling its wide use in high-performance and high-power density applications.

FEATURES

? Half-Bridge Gate Driver for GaN FETs

? 0.6Ω Pull-Up Resistance at Top Gate Driver

? 0.2Ω Pull-Down Resistance at Bottom Gate Driver

? 4A Peak Source, 8A Peak Sink Current Capability

? Smart Integrated Bootstrap Switch

? Split-Gate-Driver to Adjust Turn-On/Turn-Off Strength

? Default Low-State for All Driver Inputs and Outputs

? Maximum 15V Voltage Rating at INT and INB Inputs

? Independent INT, INB Inputs with TTL Logic Compatible

? Fast Propagation Delay: 10ns (Typical)

? Propagation Delay Matching: 1.5ns (Typical)

? Balanced Driver Supply Voltage: VBST ≈ VCC = 3.85V – 5.5V

? Undervoltage and Overvoltage Lockout Protections

? Small 12-Ball WLCSP Package

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

LTC4444屬于集成電路（IC） > 柵極驅(qū)動器。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的LTC4444柵極驅(qū)動器柵極驅(qū)動器電源管理集成電路 (PMIC) 可用于提供隔離、放大、參考位移、自舉或其他必要功能，這些功能可將來自電源轉(zhuǎn)換應(yīng)用中控制設(shè)備的信號連接到電源被控制通過的半導(dǎo)體設(shè)備（通常為 FET 或 IGBT）。任何特定設(shè)備提供的確切功能各不相同，但與它適合驅(qū)動的半導(dǎo)體配置相關(guān)。