Diodes Incorporated
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ZXLD381

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Description

The ZXLD381 is a single cell LED driver designed for applications where step-up voltage conversion from a very low input voltage is required. These applications mainly operate from 1.5V or 1.2V cells. The IC generates constant current pulses that are ideal for driving single or multiple LEDs over a wide range of operating voltages. The ZXLD381 uses a PFM control technique to drive an internal switching transistor which exhibits a low saturation resistance. This ensures high efficiency, even for input voltages as low as 1V. The IC can start up under full load and operates down to an input voltage of only 0.9V. The ZXLD381 is offered in the space saving SOT23 package or in die form, offering an excellent cost vs performance solution for single cell LED driving applications.

Feature(s)

  • 85% Efficiency
  • User adjustable output current
  • Single cell operation (0.9V minimum)
  • Low saturation voltage switching transistor
  • SOT23 package
  • Available also in Die form
  • Simple Application circuit

Application(s)

  • LED flashlights and torches
  • LED backlights
  • White LED driver

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) No
Topologies (Buck-Boost) No
Topologies (Boost) Yes
Topologies (Charge Pump) No
Minimum Input Voltage (V) 0.9
Maximum Input Voltage (V) 2.2
Maximum Output Voltage (V) 18
Maximum LED Current (A) 0.32
Switching Frequency Maximum (kHz) 350
Dimming (PWM) No
Dimming (Analog) No
Efficiency (%) 85
Operating Temperature Range (°C) 0 to 85
AEC-Q100 Grade No

Related Content

Quality Documentation

Technical Documents

ICP Reports

Evaluation Boards and User Guides

Recommended Soldering Techniques

TN1.pdf