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Controladores para LED en automóviles

LP8868Z-Q1

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Controlador LED reductor de 65 V, 4 A automotriz con opción de atenuación flexible y espectro extend

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LP8868Z-Q1

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Detalles del producto

Number of channels 1 Topology Buck Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 65 Iout (max) (A) 4 Switching frequency (max) (kHz) 2200 Features Cycle-by-cycle over-current protection, Fault output, Integrated Switching FET, LED Open Detection, LED Short Detection, Programable Switching Frequency, Spread Spectrum, Thermal Foldback, Thermal shutdown
Number of channels 1 Topology Buck Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 65 Iout (max) (A) 4 Switching frequency (max) (kHz) 2200 Features Cycle-by-cycle over-current protection, Fault output, Integrated Switching FET, LED Open Detection, LED Short Detection, Programable Switching Frequency, Spread Spectrum, Thermal Foldback, Thermal shutdown
VSON (DMT) 14 13.5 mm² 4.5 x 3
  • AEC-Q100 Qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, T A
  • Integrated MOSFET for buck, buck-boost and boost topology
    • Wide input voltage: 4.5 V to 65 V
    • Integrated 5.2-A and 150-mΩ MOSFET
    • Switching frequency 100 kHz to 2.2 MHz
    • Spread spectrum for lower EMI
  • High precision power FET dimming
    • Up to 4-A output current in buck topology
    • Analog dimming (dimming ratio 256 :1)
    • Fast PWM dimming (150-ns pulse width)
    • Hybrid and flexible dimming
  • Full protection features:
    • Fault output
    • LED open and short protection
    • Cycle-by-cycle current limit
    • Switching FET failure protection
    • Thermal shutdown
    • Configurable thermal foldback curve
  • AEC-Q100 Qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, T A
  • Integrated MOSFET for buck, buck-boost and boost topology
    • Wide input voltage: 4.5 V to 65 V
    • Integrated 5.2-A and 150-mΩ MOSFET
    • Switching frequency 100 kHz to 2.2 MHz
    • Spread spectrum for lower EMI
  • High precision power FET dimming
    • Up to 4-A output current in buck topology
    • Analog dimming (dimming ratio 256 :1)
    • Fast PWM dimming (150-ns pulse width)
    • Hybrid and flexible dimming
  • Full protection features:
    • Fault output
    • LED open and short protection
    • Cycle-by-cycle current limit
    • Switching FET failure protection
    • Thermal shutdown
    • Configurable thermal foldback curve

The LP8868-Q1 family is a non-synchronous multi-topology solution with 4.5-V to 65-V wide input range. By integrating the low-side NMOS switch, the device is capable of driving LEDs with high power density and high efficiency. The family also supports common cathode connection and single layer PCB design. The switching frequency is configurable from 100 kHz to 2.2 MHz with an optional spread spectrum feature for better EMI performance.

The LP8868-Q1 family supports four dimming options, including analog, PWM, hybrid and flexible dimming. Each dimming method can be configured through the PWM and ADIM input pins by means of simple high and low signals. The family adopts an adaptive off-time current mode control along with smart and accurate sampling to enable inductive fast dimming (IFD) and achieve high dimming accuracy.

The LP8868-Q1 family also provides multiple systematic protections, including LED open and short, sense resistor open and short, configurable thermal foldback and thermal shutdown. Fault output will send out acknowledge signals as soon as any fault condition is detected.

The LP8868-Q1 family is a non-synchronous multi-topology solution with 4.5-V to 65-V wide input range. By integrating the low-side NMOS switch, the device is capable of driving LEDs with high power density and high efficiency. The family also supports common cathode connection and single layer PCB design. The switching frequency is configurable from 100 kHz to 2.2 MHz with an optional spread spectrum feature for better EMI performance.

The LP8868-Q1 family supports four dimming options, including analog, PWM, hybrid and flexible dimming. Each dimming method can be configured through the PWM and ADIM input pins by means of simple high and low signals. The family adopts an adaptive off-time current mode control along with smart and accurate sampling to enable inductive fast dimming (IFD) and achieve high dimming accuracy.

The LP8868-Q1 family also provides multiple systematic protections, including LED open and short, sense resistor open and short, configurable thermal foldback and thermal shutdown. Fault output will send out acknowledge signals as soon as any fault condition is detected.
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Documentación técnica

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* Data sheet LP8868-Q1Automotive Multi-Topology LED Driver with Inductive Fast Dimming datasheet (Rev. A) PDF | HTML 18 ago 2023

Diseño y desarrollo

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Placa de evaluación

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