40 V White LED Step-Up DC/DC Converter / Bias Supply

    Key Features

    • High-efficiency DC/DC WLED bias supply
    • Internal 40 V, 0.55 Ohm power MOSFET
    • Up to 10 WLEDs per string
    • Two peak current ACT6358: 1A
    • Supports analog and PWM LED dimming
    • Integrated over-voltage protection (OVP)
    • Programmable soft-start function
    • Thermal shutdown
    • Cycle-by-cycle over-current protection

    Qorvo's ACT6358 is a step-up DC/DC converter that is used to drive white LEDs with an externally programmable constant current. The device features integrated 40 V power MOSFETs that are capable of driving up to ten white LEDs in series, providing inherent current matching for uniform brightness. WLED brightness adjustment is easily achieved via a dual-function pin, which accepts either a PWM or an analog dimming control signal.

    The product features a variety of protection circuits, including integrated over-voltage protection (OVP), programmable soft-start, cycle-by-cycle current limiting and thermal shutdown protection circuitry. The product has a 1 A current limit.

    ACT6358 is available in a small 3mm x 3mm 8-pin TDFN33-8 package.

    Typical Applications

      • TFT LCD Displays
      • Smartphones
      • Portable Media Players
      • GPS / Personal Navigation Devices
    Topology Step-Up
    Max Input Voltage(V) 5.5
    Max Output Voltage(V) 40
    Max Input Current(A) 1.0
    Frequency(kHz) 200 to 2,000
    Package Type TDFN, 8-pin
    Package(mm) 3 x 3
    RoHS Yes
    Lead Free Yes
    Halogen Free Yes
    ITAR Restricted No
    ECCN EAR99