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RECOM Power RVSY018 Synchronous Rectification Controller

RECOM Power RVSY018 Synchronous Rectification Controller is a high-performance, fast turn-off controller designed to support deep Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) operations. The RECOM Power RVSY018 operates at frequencies up to 700kHz, making the controller ideal for high-speed power conversion applications. Key functional parameters are programmable via external resistors, enabling flexible configuration and optimization tailored to the selected SR MOSFET's characteristics to improve overall system performance.

RVSY018 utilizes relative maximum-voltage detection technology to enable accurate SR MOSFET turn-on, effectively preventing false triggering caused by resonant negative voltages in DCM. The controller is also compatible with soft-switching topologies such as Quasi-Resonant (QR) and Active Clamp Flyback (ACF). An intelligent voltage-limited conduction feature dynamically reduces the gate drive voltage when the VDS drop is minimal. The reduced gate-drive voltage increases the MOSFET's internal resistance, preventing premature turn-off and minimizing conduction losses, enhancing overall efficiency.

The RECOM Power RVSY018 controller monitors the drain voltage of the SR MOSFET via the VD pin, which includes a built-in 100µA current source. The turn-off threshold is programmable via a resistor placed between the VD pin and the SR MOSFET's drain. Additionally, the VD-to-VDD path acts as a linear regulator with robust power delivery capability, typically eliminating the need for an external auxiliary winding. Specifically designed to withstand negative-voltage transients, the VD pin ensures stable internal circuit operation even under large negative VDS swings.

Features

  • Relative maximum voltage detection ensures effective turn-on performance
  • Programmable intelligent voltage-limited conduction to adapt to SR MOSFET
  • Supports DCM and CCM operations
  • Ultra-fast 10ns turn-off delay and 30ns turn-on delay
  • Programmable turn-off threshold
  • Programmable blanking time
  • Supports a 700kHz maximum operating frequency
  • High-power self-powering, no need for auxiliary winding
  • Supports high-/low-side synchronous rectification
  • Detection pin is designed to withstand negative voltage, regardless of the negative voltage generated by the body diode
  • Industrial-grade -40°C to +125°C operating temperature range
  • 3.0mm x 2.8mm SOT23-6 package

Applications

  • DC-DC power converters
  • AC-DC power supplies
  • Battery management system power supplies
  • Various module power supplies

Specifications

  • Operating conditions
    • 100V maximum VD to GND voltage
    • 4.7V to 10V VDD to GND voltage range
    • 6V maximum VSEL/VLC to GND voltage
  • VDD
    • 4.3V to 5.0V VDD UVLO rising threshold
    • 4.0V to 4.6V VDD UVLO falling
    • 320µA typical VDD startup current
    • 2.0mA to 8.5V maximum operating current range
    • 630µA typical quiescent current
    • 100mA to 180mA maximum charging current range
    • 8.0V to 10.0V regulation voltage range
  • VD
    • -115mV to -75mV turn-on threshold range
    • 50ns maximum turn-on delay
    • Turn-on blanking time ranges
      • 300ns to 550ns with SEL floating
      • 600ns to 1000ns with SEL connected to the GND
    • -3.0mV to 1.5mV turn-off threshold range
    • 10ns typical turn-off delay
    • 450mV to 550mV overvoltage threshold range
    • Overvoltage comparator delay ranges
      • 120ns to 180ns with SEL floating
      • 200ns to 300ns with SEL connected to the GND
    • 80µA to 120µA outflow current range
  • VLC
    • 1.4V to 1.8V VG minimum drive voltage range
    • 63V/V to 79V/V proportional coefficient range
    • 5.0V to 6.2V zener clamping voltage range
  • VSEL
    • 2.8V to 4.0V high logic voltage range
    • 1.1V to 1.7V low logic voltage range
    • Blanking time for prohibiting the enable signal generation
      • 200ns to 300ns with SEL floating
      • 400ns to 600ns with SEL connected to the GND
  • Typical VG
    • 0.04V output voltage drop at low level
    • 0.2V output voltage drop at high level
    • 1A maximum source current
    • 4A maximum sink current
    • 0.4Ω pull-down impedance
  • -40°C to +125°C operating ambient temperature range
  • +150°C maximum junction temperature
  • Thermal
    • 143.0°C/W typical junction-to-ambient thermal resistance
    • 17.4°C/W typical junction-to-top characterization parameter
  • Moisture Sensitivity Level (MSL) 3
  • ESD ratings
    • ±1500V Human Body Model (HBM) per ESDA/JEDEC JS-001-2017
    • ±1000V Charged Device Model (CDM) per ESDA/JEDEC JS-002-2022

Simplified Schematic

Schematic - RECOM Power RVSY018 Synchronous Rectification Controller

Functional Block Diagram

Block Diagram - RECOM Power RVSY018 Synchronous Rectification Controller
Inilathala: 2026-03-20 | Na-update: 2026-03-24