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Monolithic Power Systems (MPS) MPQ7231 Infrared LED Lighting Drivers

Monolithic Power Systems (MPS) MPQ7231 Infrared LED Lighting Drivers offer fixed-frequency, constant-current, and Infrared (IR) LED drivers with integrated eye safety features. These LED drivers feature a 6V to 42V operating input voltage range and are ideal for driving one or two IR LEDs. The MPQ7231 LED drivers are configured to buck or buck-boost mode and achieve up to 3A and 2.4A of peak current (ILED_PEAK), respectively. These drivers use advanced BCD FET technology to minimize ohmic losses to provide ultra-low on-resistance MOSFETs with 44mΩ (HS-FET) and 40mΩ (LS-FET). Typical applications include Driver Monitoring Systems (DMS), IR illumination for automotive cameras, and surveillance systems.

The MPQ7231 LED drivers support 10Hz to 2kHz Pulse-Width Modulation (PWM) dimming frequency range and are compatible with 30fps, 60fps, and 120fps dimming for IR LED applications. These LED drivers include eye-safety features such as LED current limiting and factory preset dimming on-time limits.


The protection features include LED short-to-battery (or ground) protection, LED open protection, Over-Current Protection (OCP) with latch, thermal derating, and thermal shutdown. The MPQ7231 LED drivers are AEC-Q100 grade 1 qualified and available in a space-saving QFN-19 (3mm x 4mm) package.

Features

  • Built for Infrared (IR) LED applications:
    • 10Hz to 2kHz Pulse-Width Modulation (PWM) dimming frequency
    • Compatible with 30fps, 60fps, and 120fps dimming
  • Improved efficiency and thermals:
    • Integrated current-sense resistor
    • 44mΩ/40mΩ On-Resistance (RDS(ON)) internal MOSFETs
  • Functional safety:
    • Eye safety features include:
      • LED current limit
      • Dimming on time limit (1ms, 3ms, or 5ms)
    • Functional safety documents available
    • Fault indication for LED short (battery and ground), LED open, Over-Voltage Protection (OVP), and thermal shutdown
    • Over-Current Protection (OCP) with latch
  • Optimized for EMC/EMI:
    • 2.4MHz (buck) or 1.25MHz (buck-boost) Switching Frequency (fSW) with Frequency Spread Spectrum (FSS)
    • EMI reduction techniques
  • Wide 6V to 42V operating VIN range
  • 3A buck or 2.4A buck-boost IL_PEAK
  • Configurable thermal derating via NTC remote temperature sensing
  • Available in a QFN-19 (3mm x 4mm) package with wettable flanks
  • AEC-Q100 Grade 1

Applications

  • Driver Monitoring Systems (DMS)
  • IR illumination for automotive cameras
  • Surveillance systems

Typical Application Circuit Diagram

Application Circuit Diagram - Monolithic Power Systems (MPS) MPQ7231 Infrared LED Lighting Drivers

Videos

公開: 2024-05-21 | 更新済み: 2024-05-31