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The ZXLD1362 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 60V and provides an externally adjustable output current of up to 1A. Depending upon supply voltage and external components, this can provide up to 48 watts of output power. The ZXLD1362 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Output current can be adjusted above, or below the set value, by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. Depending upon the control frequency, this will provide either a continuous (dimmed) or a gated output current. Soft-start can be forced using an external capacitor from the ADJ pin to ground. Applying a voltage of 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state.


  • Low voltage halogen replacement LEDs
  • Automotive lighting
  • Low voltage industrial lighting
  • LED back-up lighting
  • Illuminated signs
  • Emergency lighting
  • SELV lighting
  • LCD TV backlighting
  • Refrigeration lights


  • Simple low parts count
  • Internal 60V NDMOS switch
  • Up to 1A output current
  • Single pin on/off and brightness control using DC voltage or PWM
  • PWM resolution up to 1000:1
  • Soft start capability
  • High efficiency (up to 95%)
  • Wide input voltage range: 6V to 60V
  • 65V transient capability
  • Low power shutdown
  • Up to 500kHz switching frequency
  • Inherent open-circuit LED protection
  • Typical 2% output current accuracy

Product Specifications

Product Parameters

Qualified to AECQ10x No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
MinimumInput Voltage 6 V
MaximumInput Voltage 60 V
Maximum Output Voltage 60 V
Maximum LED Current 1 A
LED Current Accuracy 5 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 95 %
OperatingTemperatureRange -40 to 125 °C
Sense Voltage 100 mV
AEC-Q100 Grade No

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