双极性晶体管

二极管

ESD保护、TVS、滤波和信号调节ESD保护

MOSFET

氮化镓场效应晶体管(GaN FET)

绝缘栅双极晶体管(IGBTs)

模拟和逻辑IC

汽车应用认证产品(AEC-Q100/Q101)

NEX81915D

NEX81915D Production

Fast turn-off dual synchronous rectifiers (SR) controller

NEX81915 is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters. It supports operation in discontinuous conduction mode (DCM), continuous conduction mode (CCM) and critical conduction mode (CRM). It has two driver stages for driving the SR MOSFETs. By detecting the Vds of the rectifier, the MOSFETs can be reliably switched on and off, thereby replacing Schottky diodes and improving the efficiency of the resonant converter.

NEX81915 regulates the forward drop voltage of an external synchronous rectifier (SR) MOSFET by decreasing the gate voltage. This allows the SR FET to be turned off quickly when the Vds becomes positive.

NEX81915 is a green and energy-saving product. The turn-on delay time will be increased and the drive current will be decreased to minimize the power consumption at light load. The IC current will drop to a very low level during burst off period. The light load efficiency can be improved.

The device is available in SO8 (SOT96-2) package.

Figure 1. Typical application circuit
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产品细节

Features and benefits

  • 120 V voltage rating support maximum 48 V output
  • Supports CCM, CRM and DCM operation
  • Works with Standard and Logic level MOSFETs
  • Wide supply voltage ranges from 4.7 V to 35.0 V
  • 140 μA low quiescent current in light load mode
  • Regulation level of -37 mV for driving low-ohmic MOSFETs
  • Adaptive gate drive for fast turn-off at the end of conduction
  • Interlock function for channel A and B
  • Available in an SO8 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

  • AC/DC adapters
  • PC power supplies
  • LCD TV power supplies
  • Isolated DC-DC power converters

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The Nexperia Longevity Program is aimed to provide our customers information from time to time about the expected time that our products can be ordered. The NLP is reviewed and updated regularly by our Executive Management Team. View our longevity program here.

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交互式数据手册

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.

交互式数据手册