Dual Buck LED Controller with SPI Interface, Analog and PWM Dimming

Dual Buck LED Controller with SPI Interface, Analog and PWM Dimming - TPS92518


The TPS92518 family of parts are dual channel buck LED current controllers with a SPI communications interface. The serial communication interface provides a singular communication path for multichannel and platform lighting driver module (LDM) applications.

The TPS92518 uses a quasi-hysteretic control method that supports switching frequencies ranging from 1 kHz to 2 MHz. This control method enables superior, high frequency shunt FET dimming and also handles the demanding dynamic loads of adaptive LED matrix based headlamp systems.

Software programmable SPI set points (Precision Peak Current, Controlled Off-Time and Output Voltage Sense) enables designers to develop a single LED driver solution for multiple load configurations that can be quickly reconfigured for future LED driver design requirements.

The TPS92518 device has an input range up to 42 V. The TPS92518HV is a high-voltage option with an input range up to 65 V.


  • Wide Input Voltage Range 6.5 V to 65 V
  • Two independent Buck LED Controllers
    • High Bandwidth, Quasi-Hysteretic Control
    • Adjustable High-Side Sense
    • Direct PWM Dimming Input
    • Cycle-by-Cycle Current Limit
  • SPI Communications Interface
    • Software configurable Set Points (8-bit)
    • Digital Calibration and Binning
    • Fault Monitoring and Reporting
  • Advanced, High Precision Dimming
    • 10,000:1 PWM Dimming Range
    • 255:1 Analog Dimming Range
    • High Frequency Shunt FET Dimming

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Parametrics Compare all products in Illumination & General Lighting LED Driver

Input Voltage (Type)
Vin (Min) (V)
Vin (Max) (V)
Iout (Max) (A)
Vout (Min) (V)
Vout (Max) (V)
Regulated Outputs (#)
Dimming Method
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Vref (V)
Operating Temperature Range (C)
TPS92518 TPS92518HV
DC/DC    DC/DC   
6.5    6.5   
42    65   
5    5   
0    0   
39    62   
2    2   
Buck    Buck   
50    50   
2000    2000   
3    3   
0.255    0.22   
High Output Accuracy
Precision Dimming Control
Thermal Shutdown   
High Output Accuracy
Precision Dimming Control
Thermal Shutdown   
-40 to 125    -40 to 125   

Other qualified versions of TPS92518

Version Part Number Definition
Automotive TPS92518-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects