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Diodes Incorporated APR3492 Dual-Channel MOSFET Driver

Diodes Incorporated APR3492 Dual-Channel MOSFET Driver is a secondary-side MOSFET driver for synchronous rectification in LLC resonant converters. The SO-8 (standard) packaged APR3492 supports driving both high- and low-side N-channel MOSFETs. The driver features forward-voltage regulation during channel on-time to accelerate turn-off speed. The device also integrates turn-off blanking control logic to prevent cross-conduction between the two channels. 

The Diodes Inc. APR3492 offers a light-load (LL) mode, in which the device latches off the drive signals and has a low quiescent current. An external resistor can adjust the Enter threshold of the LL mode. Meanwhile, the APR3492 minimizes turn-on/-off delays through an intelligent control topology. All these technologies help the power system achieve high efficiency.

The APR3492 driver can be used in continuous conduction mode (CCM), critical conduction mode (CrCM), and discontinuous conduction mode (DCM) with fast turn-off.

Features

  • Supports LLC synchronous rectification with CCM/DCM/CrCM operation mode
  • Intelligent control to minimize turn-off delay
  • Low quiescent current in light load mode
  • Turn off blanking control to prevent cross-conduction
  • Supports high- and low-side applications
  • Few external components
  • SO-8 (standard) package
  • Totally lead-free and fully RoHS-compliant
  • Halogen- and antimony-free, Green device

Applications

  • Server and PC power
  • AC/DC adapters
  • LCD/LED TVs
  • All SMPS with high-efficiency requirements

Specifications

  • 4.2V to 51V operating supply voltage range
  • Supply voltage (VCC pin)
    • 20mA maximum operating current
    • 6mA maximum quiescent current
    • 200μA maximum shutdown current
    • 225μA maximum light load mode current
    • 3.7V to 4.2V startup voltage range
    • 0.13V to 0.24V UVLO hysteresis range
  • Drain detection (DRAIN1/2 pin)
    • -200mV typical DRISR turn-on threshold voltage
    • -62mV to -28mV DRISR regulation voltage range
    • 10mV to 50mV DRISR turn-off threshold voltage range
  • Gate driver (DRISP1/2 pin)
    • 0.1V maximum diver voltage low
    • 7.5V to 13V maximum driver voltage high range
    • 0.5A (typical) maximum driver sourcing current
    • 1.5Ω maximum drive pull-low resistance
    • 150ns maximum turn-on delay time
    • 90ns maximum turn-off propagation delay time
    • 1.1μs (typical) minimum on time 
    • 0.4μs typical turn-off blanking time
  • Light load mode section (LL pin)
    • 1.7μs to 3μs enter threshold range
    • 2.15μs to 3.45μs exit threshold range
    • 0.5ms to 1.5ms enter delay time range
  • 0.6W maximum power dissipation at +25°C
  • Overtemperature protection
    • +150°C typical shutdown temperature
    • +10°C typical temperature hysteresis
  • 0.076g approximate weight
  • Matte tin-plated leads, solderable per JESD22-B102
  • -40°C to +85°C operating temperature range
  • +150°C maximum operating junction temperature
  • +300°C maximum soldering lead temperature, 10s
  • Moisture Sensitivity Level (MSL) 3 per JESD22-A113
  • Thermal
    • 106.22°C/W junction-to-ambient thermal resistance
    • 34.06°C/W junction-to-case (top) thermal resistance
    • 46.47°C/W junction-to-board thermal resistance
    • 2.34°C/W junction-to-top characterization parameter
    • 45.44°C/W junction-to-board characterization parameter
    • 48.03°C/W junction-to-case (bottom) thermal resistance
  • Maximum ESD ratings
    • 5000V Human Body Model (HBM)
    • 1000V Charged Device Model (CDM)

Resources

Typical Applications Circuit

Application Circuit Diagram - Diodes Incorporated APR3492 Dual-Channel MOSFET Driver

Functional Block Diagram

Block Diagram - Diodes Incorporated APR3492 Dual-Channel MOSFET Driver
Publicerad: 2026-04-22 | Uppdaterad: 2026-05-19