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S6BL111A 1-ch 1A LED Driver | Cypress Semiconductor

S6BL111A 1-ch 1A LED Driver

The S6BL111A is an automotive-grade 1 channel 1A output LED driver, and is unique in its ability to drive a single LED at a 2.1-MHz switching frequency. This enables a compact solution that uses small, inexpensive inductors, reducing physical size and bill-of-materials costs. It features an input voltage range of 4.5-42 V that encompass extreme operating conditions such as cold-cranking —when the automobile engine starter draws an excessive amount of current due to starting the engine in cold temperatures—or load dump—a power surge that occurs when an automobile battery is disconnected while the alternator is supplying current during engine operation. The S6BL111A offers fine brightness control through analog and PWM dimming functions. The device switching frequency can be set between 205 kHz and 2.1 MHz, with high output accuracy of +/-2%. The driver also facilitates the design of electrical system safeguards by including System Safety Functions such as over current and voltage protection, as well as the ability to mask undesired LED OPEN diagnosis during cold cranking.

Key Features:

  • Power converter type: Buck LED driver
  • Compatible with single LED
  • Input voltage range: 4.5 V-42 V
  • Maximum output current: 1 A
  • Adjustable switching frequency: 205 kHz-2.1 MHz
  • Output current accuracy: +/-2.0 %, across entire switching frequency range
  • Minimum on time: 35 ns


  • Under Voltage Lock-out (UVLO)
  • Under Voltage Detection (UVD)
  • Over Current Limit (OCL)
  • LED Open Detection (OPEN)
  • Thermal Shut Down (TSD)
  • Diagnosis output (DIAG)


  • Adjustable masking voltage


  • Analog
  • PWM


  • 16-pin Thermally Enhanced TSSOP


  • AEC-Q100 Grade 1


  • Daytime running light
  • Clearance light
  • Turn light
  • Fog light
  • Head light


Block Diagram:


To request an evaluation kit, please contact your local sales representative.