R1580 Series
Constant Current LED Driver

  • Description

    The R1580 is a 34-V constant-current LED driver controller. Internally, this device consists of a linear dimming controller using a PWM input signal, a thermal shutdown circuit (TSD), and an undervoltage lockout circuit (UVLO) in addition to the basic constant-current control circuits. A flicker-free wide-dimming constant-current LED driver can be configured by only adding an Nch MOSFET, a current sensing resistor and capacitors to the R1580. The FET to control current flow is placed externally, so that the R1580 will not give any influence on the current range capable of dealing with. The R1580 is linear dimmable with using a PWM signal on the DIM pin. The R1580 is capable of performing a constant-current control corresponding to the different PWM duty cycles. The R1580N002A is linear dimmable as low as 0.5% PWM duty cycle and the R1580N001A/ R1580N003A is linear dimmable as low as 1% PWM duty cycle. Unlike other LED drivers with PWM dimming, the R1580 can provide a smooth flicker-free dimming operation using linear dimming.

  • Spec
    Consumer Industrial Automotive
    Input Voltage Range 3.6 V to 34.0 V (36.0 V)
    Operating Temperature Range -40°C to 85°C -40°C to 105°C -40°C to 105°C
    Supply Current Typ. 320 µA
    Standby Current Typ. 140 µA (R1580N001A/ R1580N002A)
    Typ. 28 µA (1580N003A)
    PWM Input Dimmable Range 1% to 100% (R1580N001A/ R1580N003A)
    0.5% to 100% (1580N002A)
    Control Type Linear Dimmable Using a PWM Signal
    Package SOT-23-6
    Line Regulation Typ. 0.01%/V
    Thermal Shutdown Protection Thermal Shutdown Temperature: Typ. 160°C
  • Technical
    Documents
    • Typical Application

      Typical Application

      R1700 + R1580 Typical Application Circuit, Buck-boost (Inverting) Converter

      Integration of R1700 and R1580

      The integration of R1700 and R1580 allows a smaller flicker-free operation in LED lighting applications than a conventional two-stage architecture.

      Typical Characteristics

      Comparison of Digital Image

      • PWM Dimming

        PWM Dimming

      • Linear Dimming (R1580)

        Linear Dimming (R1580)

  • Quality &
    Packages
    • Refer to the datasheets for the details on the product.
    • The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
    • Please contact us or our distributors for unpublished reliability information.

Download Datasheet

Functional Description

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