Diodes Incorporated
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The ZXLD1374 is a 60V LED driver with integrated 1.5A low side switch to drive high current LEDs. It is a multi-topology converter enabling it to operate in Buck, Boost and Buck-boost configurations; efficiently controlling the current of up to 16-series connected LEDs. 

The ZXLD1374 is a modified hysteretic converter using a patent pending control scheme providing high output current accuracy in all three topologies. High accuracy dimming is achieved through DC control and high frequency PWM control. 

The ZXLD1374 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. 

The ZXLD1374 has been qualified to AEC-Q100 Grade 1 enabling operation in ambient temperatures from -40 to +125°C. 



  • 0.5% Typical Output Current Accuracy 
  • 6.3 to 60V Operating Voltage Range 
  • 1.5A Integrated Low Side Switch 
  • LED Driver Supports Buck, Boost and Buck-Boost Topologies 
  • Wide Dynamic Range Dimming 
  • 20:1 DC Dimming 
  • 1000:1 Dimming Range at 500Hz 
  • Up to 1MHz Switching 
  • High Temperature Control of LED Current Using TADJ 
  • AEC-Q100 Grade 1 
  • TSSOP-20EP: Available in “Green” Molding Compound (No Br, Sb) with lead Free Finish/ RoHS Compliant 
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device 

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) 6.5
Maximum Input Voltage (V) 60
Maximum Output Voltage (V) 60
Maximum LED Current (A) 1.5
LED Current Accuracy (%) 2
Switching Frequency Maximum (kHz) 1000
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 95
Operating Temperature Range (°C) -40 to 125
Sense Voltage (mV) 225
AEC-Q100 Grade No

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