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雙極性晶體管

二極管

ESD保護、TVS、濾波和信號調節ESD保護

MOSFET

氮化鎵場效應晶體管(GaN FET)

絕緣柵雙極晶體管(IGBTs)

模擬和邏輯IC

汽車應用認證產品(AEC-Q100/Q101)

NEX81802DA

Adaptive Synchronous Rectifier (SR) controller with 0.5 to 1.5 microseconds turn-on blanking time

The NEX81801DA and NEX81802DA (NEX81801/2DA) are high performance synchronous rectification controllers used in switching mode power supplies. It supports operation in Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM) and quasi-resonant flyback converters.

The NEX81801/2DA regulates the forward drop voltage of an external synchronous rectifier (SR) MOSFET in two stages. This allows the SR FET to turn off quickly when the VDS becomes positive.

The externally adjustable turn-on blanking time can effectively prevent the synchronous rectifier from being falsely turned off due to leakage inductance and parasitic parameter oscillation.

The adaptive turn-on detection circuit can prevent the SR from being mistakenly turned on when the VDS DCM oscillation crosses zero during some load conditions. The adaptive turn-on detection circuit also enhances SR conduction efficiency during light load conditions, thereby improving the average efficiency of the power supply across the entire load range.

The synchronous switch can be configured at high-side or low-side output without auxiliary windings or other power sources, because the NEX81801/2DA has a self-supply capability.

The NEX81801/2DA uses TSOT23-6 packaging with low thermal resistance. This can effectively reduce the junction temperature of the chip, making it suitable for high-density power supply design.

Features and benefits

  • Supports DCM, CCM, QR operation

  • Supports up to 800 kHz switching frequency

  • Standard and logic level MOSFET driving capability

  • Wide output range down to 0 V with 2-channel VCC supply

  • No need for auxiliary winding for high-side or low-side rectification

  • Smart proportional gate driver for fast SR turn-off at CCM

  • Adjustable turn-on blanking time for increased noise immunity

  • Proprietary adaptive turn-on detection prevents SR FET from falsely turning on during DCM operation

  • 10 ns typical turn-off propagation delay

  • Available in a TSOT23-6 FC package

  • ESD protection:

    • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C2a exceeds 500 V

Applications

  • USB PD/QC chargers

  • AC/DC adapters for portable devices

  • Flyback SMPS with high-efficiency requirements

封裝

型號 可訂購的器件編號，（訂購碼(12NC)） 狀態 標示 封裝 外形圖 回流焊/波峰焊 包裝
NEX81802DA NEX81802DAZ
(935691936342)		 Active ND4 SOT8061-1
TSOT23-6FC
(SOT8061-1) 		SOT8061-1 SOT8061-1_342

環境信息

型號 可訂購的器件編號 化學成分 RoHS RHF指示符
NEX81802DA NEX81802DAZ NEX81802DA rohs rhf rhf
品質及可靠性免責聲明

文檔 (3)

文件名稱 標題 類型 日期
NEX8180X Adaptive Synchronous Rectifier (SR) Controller Data sheet 2024-09-30
SOT8061-1 plastic, surface-mounted package; 6 leads; 0.95 mm pitch; 2.9 mm x 1.6 mm x 1.1 mm body Package information 2024-04-09
SOT8061-1_342 TSOT23-6FC; Reel dry pack for SMD, 7"; Q3/T4 product orientation Packing information 2024-04-29

支持

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模型

No documents available

訂購、定價與供貨

型號 Orderable part number Ordering code (12NC) 狀態 包裝 Packing Quantity 在線購買
NEX81802DA NEX81802DAZ 935691936342 Active SOT8061-1_342 3,000 訂單產品

樣品

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How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.

可訂購部件

型號 可訂購的器件編號 訂購代碼(12NC) 封裝 從經銷商處購買
NEX81802DA NEX81802DAZ 935691936342 SOT8061-1 訂單產品