65W GaN converter delivers space-saving power for cost-conscious applications

65W GaN轉(zhuǎn)換器為成本敏感型應(yīng)用提供緊湊型電源解決方案

ST’s VIPerGaN65D flyback converter, with its SOIC16 outline, permits extremely small and economical power supplies, adapters, and USB-PD (Power Delivery) fast chargers up to 65W with universal input voltage.

意法半導(dǎo)體推出的VIPerGaN65D反激式轉(zhuǎn)換器采用SOIC16封裝，可打造超小型經(jīng)濟(jì)高效的電源適配器、USB-PD（供電）快速充電器等產(chǎn)品，支持通用輸入電壓條件下最高65W輸出功率。

The quasi-resonant offline converter integrates a 700V gallium nitride (GaN) transistor and optimized gate driver with typical protection features, making wide-bandgap technology easily accessible to elevate power density and efficiency. The GaN transistor operates at up to 240kHz, with minimal switching losses, permitting a small flyback transformer, small passive components, and a compact, low-cost circuit board.

這款準(zhǔn)諧振離線式轉(zhuǎn)換器集成了700V氮化鎵 (GaN) 晶體管和優(yōu)化的柵極驅(qū)動(dòng)器，具備典型保護(hù)功能，使寬禁帶半導(dǎo)體技術(shù)更易實(shí)現(xiàn)高功率密度和高能效。GaN晶體管的最高工作頻率達(dá)240kHz，開關(guān)損耗極低，支持使用小型反激變壓器、微型無(wú)源元件和緊湊型低成本電路板。

While other members of the VIPerGaN family are packaged in 5mm x 6mm DFN, the VIPerGaN65D is packaged into a more traditional SO16n (narrow) outline.

盡管VIPerGaN系列的其他成員均采用5mm x 6mm DFN封裝，VIPerGaN65D則采用更傳統(tǒng)的SO16n（窄體）封裝。

The converter operates with zero-voltage switching and can adjust the valley-synchronization delay to ensure the GaN transistor always turns on at the valley of the drain resonance. Also featuring dynamic blanking time to help maintain efficiency with increasing input voltage, the converter adapts to maximize overall efficiency at any line and load condition. In addition, feedforward compensation minimizes the input peak power variation over the input voltage range.

該轉(zhuǎn)換器采用零電壓開關(guān)技術(shù)，可調(diào)整谷底同步延遲時(shí)間，確保GaN晶體管始終在漏極諧振谷底導(dǎo)通。其動(dòng)態(tài)消隱時(shí)間特性可隨輸入電壓升高保持效率水平，使轉(zhuǎn)換器能適應(yīng)各種線路和負(fù)載條件實(shí)現(xiàn)整體效率最大化。此外，前饋補(bǔ)償能有效降低輸入電壓范圍內(nèi)的輸入峰值功率變化。

The VIPerGaN65D current limit of 3.5A lets the converter deliver up to 65W when designed for the universal input voltage range from 85V to 265V. Designing for 185V-265V input allows a maximum power rating of 85W. The standby power is below 30mW, meeting requirements of the latest international energy efficiency standards.

在85V至265V通用輸入電壓范圍設(shè)計(jì)條件下，VIPerGaN65D憑借3.5A的限流能力可實(shí)現(xiàn)最高65W輸出功率。當(dāng)輸入電壓設(shè)計(jì)范圍為185V-265V時(shí)，最大額定功率可達(dá)85W。待機(jī)功耗低于30mW，符合最新國(guó)際能效標(biāo)準(zhǔn)要求。

The VIPerGaN65D enables tiny, low-cost fast chargers and adapters, and can power washing machines, dishwashers, coffee makers, televisions, set-top boxes, digital cameras, portable audio players, cordless shavers, and more. It is also used in auxiliary supplies for desktop PCs and servers, building and home automation equipment, energy meters, domestic and architectural lighting, and air conditioners.

VIPerGaN65D可應(yīng)用于微型低成本快速充電器/適配器，并為洗衣機(jī)、洗碗機(jī)、咖啡機(jī)、電視機(jī)、機(jī)頂盒、數(shù)碼相機(jī)、便攜式音頻設(shè)備、無(wú)線剃須刀等設(shè)備供電。此外，還可用于臺(tái)式電腦和服務(wù)器的輔助電源、樓宇及家庭自動(dòng)化設(shè)備、智能電表、家用及建筑照明系統(tǒng)、空調(diào)等場(chǎng)景。

Contributing to the minimal bill of materials, the VIPerGaN65D integrates a SENSEFET (current-sensing power MOSFET) that provides accurate current sensing needed to optimize efficiency and activate system protection. Built-in features include overcurrent protection, output overvoltage protection, input-voltage feed-forward compensation, brown-in/brown-out protection, input-overvoltage protection, output overload protection, output short-circuit protection, and thermal shutdown. All the protection features have auto-restart and the converter also implements frequency jitter for EMI suppression.

為最大限度精簡(jiǎn)物料清單，VIPerGaN65D集成SENSEFET（電流檢測(cè)功率MOSFET），可提供精確電流檢測(cè)以優(yōu)化效率并激活系統(tǒng)保護(hù)。其內(nèi)置功能包括過(guò)流保護(hù)、輸出過(guò)壓保護(hù)、輸入電壓前饋補(bǔ)償、輸入欠壓保護(hù)、輸入過(guò)壓保護(hù)、輸出過(guò)載保護(hù)、輸出短路保護(hù)和熱關(guān)斷。所有保護(hù)功能均支持自動(dòng)重啟。此外，轉(zhuǎn)換器還采用頻率抖動(dòng)技術(shù)以抑制電磁干擾。

The EVLVIPGAN65DF reference design helps accelerate power-supply projects based on the VIPerGaN65D. Combining the converter with secondary synchronous rectification, controlled by ST’s SRK1001 adaptive controller, the EVLVIPGAN65DF presents a fully protected 24V, 65W power supply with peak efficiency greater than 93%.

EVLVIPGAN65DF參考設(shè)計(jì)可加速基于VIPerGaN65D的電源項(xiàng)目開發(fā)。該方案將轉(zhuǎn)換器與次級(jí)同步整流技術(shù)相結(jié)合（由意法半導(dǎo)體SRK1001自適應(yīng)控制器控制），打造出具備全面保護(hù)功能的24V/65W電源系統(tǒng)，峰值效率超過(guò)93%。

The VIPerGaN65D is available now in the SOIC16 narrow-body package, from $1.16 each for orders of 1000 pieces.

VIPerGaN65D現(xiàn)已上市，采用SOIC16窄體封裝；千片起訂單價(jià)1.16美元。

For further information please visit: www.st.com/vipergan65d

如需了解更多信息，請(qǐng)?jiān)L問(wèn)：www.st.com/vipergan65d