Diodes Incorporated

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60V High Accuracy Buck/Boost/Buck-Boost LED Driver-Controller

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The ZXLD1371 is an LED driver controller IC for driving external MOSFETs to drive high-current LEDs. It is a multi-topology controller enabling it to efficiently control the current through series connected LEDs. The multi-topology enables it to operate in buck, boost and buck-boost configurations.

The 60V capability coupled with its multi-topology capability enables it to be used in a wide range of applications and drive in excess of 15 LEDs in series.

The ZXLD1371 is a modified hysteretic controller using a patent pending control scheme providing high output current accuracy in all three modes of operation. High accuracy dimming is achieved through DC control and high frequency PWM control.

The ZXLD1371 uses two pins for fault diagnosis. A flag output highlights a fault, while the multi-level status pin gives further information on the exact fault.


  • 0.5% typical output current accuracy
  • 5 to 60V operating voltage range
  • LED driver supports Buck, Boost and Buck-boost configurations
  • Wide dynamic range dimming
  • 10:1 DC dimming
  • 1000:1 dimming range at 500Hz
  • Up to 1MHz switching
  • High temperature control of LED current using TADJ
  • Available in Automotive Grade with AEC-Q100 and IATF16949 certification


  • Automotive daylight running lights
  • Commercial/industrial illumination
  • Street lights

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) Yes
Topologies (Boost) Yes
Topologies (Charge Pump) No
Minimum Input Voltage (V) 5
Maximum Input Voltage (V) 60
Maximum Output Voltage (V) Ext MOSFET
Maximum LED Current (A) Ext MOSFET
LED Current Accuracy (%) 2
Switching Frequency Maximum (kHz) 1000
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 97
Operating Temperature Range (°C) -40 to 125
Sense Voltage (mV) 225
AEC-Q100 Grade No

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