LT8419

Name: LT8419
Brand: Analog Devices
Availability: InStock

推荐用于新设计

100V 半桥 GaN 驱动器，单引脚三态 PWM 输入，智能集成自举开关，可调死区时间

用于 GaN FET 的半桥栅极驱动器

数据手册 (Rev. 0) 产品选型表

产品模型: 1

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概述

用于 GaN FET 的半桥栅极驱动器
0.6Ω 驱动器上拉电阻
0.2Ω 驱动器下拉电阻
4A 峰值源、8A 峰值灌电流能力
智能集成式引导开关可防止 BST-SW 电压过充
用于调节开/关强度的分流栅极驱动器
所有驱动器输出的默认低状态

单路、三态、TTL 逻辑兼容的 PWM 输入
可编程死区时间约为 2ns、6ns 和 10.5ns
快速传播延迟：13.5 纳秒（典型值）
平衡驱动器电源电压：V_BST ≈V_CC = 3.85V - 5.5V
欠压和过压锁定保护
小型 12 焊球 WLCSP 封装

产品模型: 1

参考资料

数据手册 1

LT8419: 100V Half-Bridge GaN Driver with Single-Pin, Three-State PWM Input, Smart Integrated Bootstrap S witch, and Adjustable Dead Time Data Sheet (Rev.0) 07/31/2026

用户手册 2

EVAL-LT8419-AZ User Guide: 100V Half-Bridge GaN Driver with Single-Pin, Three-State PWM Input, Smart Integrated Bootstrap Switch, and Adjustable Dead Time (Rev.0) 07/31/2026

EVAL-LT8419-BZ User Guide: LTC7871 High-Power, Polyphase, Bidirectional Supply/Charger with LT8419 GaN Driver (Rev.0) 08/17/2026

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产品型号	引脚/封装图-中文版	文档	CAD 符号，脚注和 3D模型
LT8419ACBZ-R7	WLCSP	Material Declaration Reliability Report 资料包	Ultra Librarian SamacSys

软件资源

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工具及仿真模型

LTspice

LTspice中提供以下器件型号：

LT8419

LTspice^®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

评估套件

LTC7871 High-Power, Polyphase, Bidirectional Supply/Charger with LT8419 GaN Driver

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产品详情

The EVAL-LT8419-BZ is a high-power, high-efficiency, six-phase bidirectional converter featuring the LTC7871 controller and LT8419 GaN drivers. Each phase uses an LT8419 half-bridge driver to drive EPC2361 GaN FETs, with the gate driver placed close to the FETs and driven by PWM signals from the LTC7871. The VHIGH and VLOW terminals serve as either inputs or outputs, depending on the direction of power flow. In buck mode, which is selected by SW1, the board converts 30V to 70V at VHIGH to a regulated 12V output at V_LOW. In boost mode, it converts 10V to 14V at V_LOW to a regulated 48V output at V_HIGH.

The maximum V_LOW current is 200A in either direction, limited by the selected inductors. Maximum output power is 2.4kW in buck mode across the specified input range, and 2.4kW in boost mode when V_LOW is 12V. External airflow is required for operation at maximum power.

Inductor current in each phase is sensed through a low 1mΩ resistor using a highly accurate AC/DC current-sensing architecture with low power dissipation. The LTC7871 constant-current loop provides DC current limiting for current flowing into or out of the VLOW terminal, depending on the state of the BUCK pin. This current limit is programmable through the SETCUR pin and can be monitored at the IMON pin.

The EVAL-LT8419-BZ includes a SPI-compatible serial port. With a DC2026C (Linduino^® One) demo board and QuikEval™ software on a host computer, the user can:

Margin the regulated V_LOW or V_HIGH up or down.
Margin the DC current limit up or down with the SETCUR pin.
Adjust the frequency spread and modulation rate of the spread spectrum circuit when spread spectrum is enabled.
Monitor the operational status and faults of the LTC7871.

资料

EVAL-LT8419-BZ User Guide: LTC7871 High-Power, Polyphase, Bidirectional Supply/Charger with LT8419 GaN Driver (Rev.0)
2026/8/17

EVAL-LT8419-BZ - Design Files
2026/8/17

EVAL-LT8419-BZ - Schematic
2026/8/17

100V 半桥 GaN 驱动器，单引脚三态 PWM 输入，智能集成自举开关，可调死区时间

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产品详情

EVAL-LT8419-AZ 评估板采用 LT8419 驱动两个 100V 增强型氮化镓 (eGaN) 器件，构成半桥配置。该电路作为降压型转换器进行了优化，在 1 MHz 开关频率下，实现从 48V 高压（_HV）到 24/12V 低压（_LV）的转换，但它也可以用作升压型转换器，或由半桥组成的其他转换器拓扑。

需要外部 PWM 信号来驱动电路板。LT8419 驱动器具有强大的 0.2Ω 下拉驱动和 0.6Ω 上拉驱动，用于控制两个 100V GaN 套件的栅极。它还集成了智能集成引导开关，可从具有最小电压差的 V_CC 生成平衡引导电压。LT8419 提供分离栅极驱动器来调整 GaN 套件的开启和关闭压摆率，从而抑制振荡和优化 EMI 性能。