LT8418
LT8418
RECOMMENDED FOR NEW DESIGNS100V Half-Bridge GaN Driver with Smart Integrated Bootstrap Switch
- Part Models
- 1
- 1ku List Price
- Starting From $2.13
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Overview
- 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
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.
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
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Video 3
Brochure 1
Analog Dialogue 3
Rarely Asked Question 1
Webcast 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT8418ACBZ-R7 | 12-ball WLCSP (1.655 mm x 1.655 mm x 0.50 mm) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 1
Models for the following parts are available in LTspice:
- LT8418
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
100V Half-Bridge GaN Driver with Smart Integrated Bootstrap Switch
Resources
100V Half-Bridge GaN Driver with Smart Integrated Bootstrap Switch
Resources
Reference Designs
High‑Efficiency GaN Motor Drive Control Solution for BLDC and Servo Motors