6W单极隔离辅助电源 用于SiC MOSFET与IGBT栅极驱动器

本参考设计展示了伍尔特电子开发的一款紧凑型辅助电源设计，提供范围在+15 V到+20 V之间可调的单极电压，同时支持高达6 W的最大输出功率，输入电压则可覆盖9V到18 V。

This reference design presents an extremely compact auxiliary power supply by Würth Elektronik providing a unipolar voltage adjustable between +15 V and +20 V. It sources a maximum output power of up to 6 W while covering an input voltage range from 9 to 18 V.

该设计针对高压SiC MOSFET和IGBT设备及功率模块进行了优化，无需栅极驱动负电压，并且可以轻松集成到栅极驱动系统中。

The design is optimized for driving high-voltage SiC MOSFET and IGBT devices and power modules without a negative gate drive voltage requirement, and can be easily integrated into the gate driver system.

WE-AGDT系列750318114变压器拥有极低绕组间电容（最低达 6.8 pF），有助于实现高CMTI（共模瞬态抗扰度）等级，从而实现快速的开关转换，在电动汽车、可再生能源或工业自动化等主流应用中提高效率和功率密度。

The extremely low interwinding capacitance of the WE-AGDT 750318114 transformer down to 6.8 pF helps to achieve high CMTI rating (Common-Mode Transient Immunity). This enables fast switching speeds which can yield efficiency and power density gains, as increasingly required in trending applications in e-mobility, renewable energy or industrial automation.

本文档还提供了+15 V、+18 V和+20 V输出电压的实验结果。

In this document, experimental results for output voltages of +15 V, +18 V and +20 V are provided.

设计优势/Key features

紧凑尺寸（电路板A: 27 mm x 14 mm x 14 mm）（电路板B: 40 mm x 14 mm x 13mm)

Small size (Var.A: 27 mm x 14 mm x 14 mm) (Var.B: 40 mm x 14 mm x 13 mm)

输入电压范围：9V-18V

Input voltage range: 9 to 18 V

可调节输出电压 Adjustable output voltage

已验证三种输出电压结果：RD002-1: +15V/0V、RD002-2: +18V/0V 与RD002-3: +20V/0V

Validated results for three common output voltages: RD002-1: +15V/0V, RD002-2: +18V/0V and RD002-3: +20V/0V

4 kV初级-次级隔离

4 kV primary-secondary isolation

WE-AGDT变压器寄生电容仅6.8 pF，支持高CMTI需求

WE-AGDT transformer with only 6.8 pF typ. parasitic capacitance enabling high CMTI

基于LT8302 (ADI Power by Linear) 的PSR反激拓扑

PSR Flyback topology with LT8302 (ADI Power by Linear)

提供两种物料清单：标准版和AEC-Q认证版

Two BoM variants: Standard and AEC-Q component qualification

两种PCB布局选项（2层和4层）

Two PCB Layout Variants (2-layer and 4-layer)

典型应用/Typical applications

电动汽车：电动动力总成

E-mobility: electric powertrain

车载和非车载电池充电器

On-board and off-board battery chargers

工业驱动：交流电机逆变器

Industrial drives: AC motor inverter

可再生能源：太阳能逆变器

Renewable energy: solar inverters

功率因数校正（PFC）电路

Power factor correction (PFC) stages

采用SiC MOSFET的开关电源

Switch-mode power supplies with SiC MOSFETs

应用笔记/Application notes

CN:《RD002-6W单极隔离辅助电源用于SiC MOSFET与IGBT栅极驱动器》

EN:RD002-6W Unipolar isolated auxiliary supply for SiC-MOSFET & IGBT gate driver