本參考設計展示了伍爾特電子開發的一款緊湊型輔助電源設計，提供范圍在+15 V到+20 V之間可調的單極電壓，同時支持高達6 W的最大輸出功率，輸入電壓則可覆蓋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.

該設計針對高壓SiC MOSFET和IGBT設備及功率模塊進行了優化，無需柵極驅動負電壓，并且可以輕松集成到柵極驅動系統中。

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變壓器擁有極低繞組間電容（最低達 6.8 pF），有助于實現高CMTI（共模瞬態抗擾度）等級，從而實現快速的開關轉換，在電動汽車、可再生能源或工業自動化等主流應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.

本文檔還提供了+15 V、+18 V和+20 V輸出電壓的實驗結果。

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

設計優勢/Key features

緊湊尺寸（電路板A: 27 mm x 14 mm x 14 mm）（電路板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)

輸入電壓范圍：9V-18V

Input voltage range: 9 to 18 V

可調節輸出電壓 Adjustable output voltage

已驗證三種輸出電壓結果：RD002-1: +15V/0V、RD002-2: +18V/0V 與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初級-次級隔離

4 kV primary-secondary isolation

WE-AGDT變壓器寄生電容僅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反激拓撲

PSR Flyback topology with LT8302 (ADI Power by Linear)

提供兩種物料清單：標準版和AEC-Q認證版

Two BoM variants: Standard and AEC-Q component qualification

兩種PCB布局選項（2層和4層）

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

典型應用/Typical applications

電動汽車：電動動力總成

E-mobility: electric powertrain

車載和非車載電池充電器

On-board and off-board battery chargers

工業驅動：交流電機逆變器

Industrial drives: AC motor inverter

可再生能源：太陽能逆變器

Renewable energy: solar inverters

功率因數校正（PFC）電路

Power factor correction (PFC) stages

采用SiC MOSFET的開關電源

Switch-mode power supplies with SiC MOSFETs

應用筆記/Application notes

CN:《RD002-6W單極隔離輔助電源用于SiC MOSFET與IGBT柵極驅動器》

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