NJW4814 Series
Dual H-Bridge Driver with Boost Converter

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  • Description

    The NJW4814 is a dual H-bridge driver with boost converter IC. It can boost the output voltage from Li-ion battery and/or a 5V power supply and drives a piezo device by two H- bridge drivers. 48ms of internal fixed soft start function of the boost circuit sets a limit to startup current. The dual H-bridge drivers have independent signal inputs and a fault output function, therefore the NJW4814 improves controllability from a microcomputer.The input frequency of H-bridge driver is up to 300kHz.

  • Spec
    Channels 4(Half)
    Output Rise/Fall Time Typ. 400nsec / 340nsec
    Structure Bi-CMOS Technology
    Wide Operating Temperature -40℃ to +85℃
    Junction Temp. +150℃
    Package EQFN24-LE
    Boost Converter Block Output Switch Voltage (40V max.)
    Switching Current (1.5A min.)
    PWM Control
    Oscillation Frequency Range (380k to 1MHz)
    Soft Start Function (48ms typ.)
    Over Current Protection
    Over Voltage Protection
    H-Bridge Driver Block Internal 2 Channel H-Bridge
    Each Channel Operates Individually
    Over Current Protection (±300mA typ.)
    Switching Frequency (300kHz max.)
    Output Shut Down Control
    Fault Indicator Output
    Note Under Voltage Lockout
    Built-in Thermal Shutdown
    Standby Function

    Protections / Functions

  • Technical
  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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Functional Description

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Category:Switching Drivers

Sub Ctegory Boost Converter
No.of Circuit 4
Drive Circuit Half
Supply Voltage
Supply Voltage
Output Peak
Current typ(A)
Switching Current