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Controladores para LED en automóviles

LP8869C-Q1

ACTIVO

Controlador LED automotriz de 3 canales y 120 mA altamente integrado

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LP8869C-Q1

ACTIVO
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Detalles del producto

Number of channels 3 Topology Boost with Current Sink, SEPIC Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 40 Vout (min) (V) 6 Vout (max) (V) 45 Iout (max) (A) 0.36 Iq (typ) (mA) 4.5 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Enable/Shutdown, Fault Detection, Global dimming, Integrated Switch, LED Open Detection, LED Shorted Detection, Soft Start, Spread Spectrum, Synchronization Pin, Thermal shutdown
Number of channels 3 Topology Boost with Current Sink, SEPIC Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 40 Vout (min) (V) 6 Vout (max) (V) 45 Iout (max) (A) 0.36 Iq (typ) (mA) 4.5 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Enable/Shutdown, Fault Detection, Global dimming, Integrated Switch, LED Open Detection, LED Shorted Detection, Soft Start, Spread Spectrum, Synchronization Pin, Thermal shutdown
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • AEC-Q100 Qualified for automotive applications:
    • Device temperature grade 1:
      –40°C to +125°C, TA
  • 3-, 4-Channel 120-mA LED driver for automotive LCD display
    • High dimming ratio of 10 000:1 at 100 Hz
    • Current matching 1% (typical)
    • LED String current up to 120 mA per channel
    • Outputs can be combined externally for higher current per string
  • Integrated boost and SEPIC converter for LED string power
    • Input voltage operating range 4.5 V to 40 V
    • Output voltage up to 45 V
    • Integrated 3.3-A Switch FET
    • Switching frequency 300 kHz to 2.2 MHz
    • Switching synchronization input
    • Spread spectrum for lower EMI
  • Protection and fault detection
    • Fault output
    • Input voltage OVP, UVLO
    • Boost OVP
    • SW OVP
    • LED Open and short fault detection
    • Thermal shutdown
  • AEC-Q100 Qualified for automotive applications:
    • Device temperature grade 1:
      –40°C to +125°C, TA
  • 3-, 4-Channel 120-mA LED driver for automotive LCD display
    • High dimming ratio of 10 000:1 at 100 Hz
    • Current matching 1% (typical)
    • LED String current up to 120 mA per channel
    • Outputs can be combined externally for higher current per string
  • Integrated boost and SEPIC converter for LED string power
    • Input voltage operating range 4.5 V to 40 V
    • Output voltage up to 45 V
    • Integrated 3.3-A Switch FET
    • Switching frequency 300 kHz to 2.2 MHz
    • Switching synchronization input
    • Spread spectrum for lower EMI
  • Protection and fault detection
    • Fault output
    • Input voltage OVP, UVLO
    • Boost OVP
    • SW OVP
    • LED Open and short fault detection
    • Thermal shutdown

The LP8867C-Q1, LP8869C-Q1 is an automotive highly-integrated, low-EMI, easy-to-use LED driver with DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four or three high-precision current sinks that can be combined for higher current capability.

The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP886xC-Q1 to avoid disturbance for sensitive frequency band.

The input voltage range for the LP886xC-Q1 is from 4.5 V to 40 V to support automotive stop, start and load dump condition. The LP886xC-Q1 integrates extensive fault detection features.

The LP8867C-Q1, LP8869C-Q1 is an automotive highly-integrated, low-EMI, easy-to-use LED driver with DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four or three high-precision current sinks that can be combined for higher current capability.

The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP886xC-Q1 to avoid disturbance for sensitive frequency band.

The input voltage range for the LP886xC-Q1 is from 4.5 V to 40 V to support automotive stop, start and load dump condition. The LP886xC-Q1 integrates extensive fault detection features.
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Documentación técnica

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* Data sheet LP8867C-Q1, LP8869C-Q1 Low EMI Automotive LED Driver with 4-, 3- Channels datasheet PDF | HTML 15 mar 2019
Functional safety information Streamlining Functional Safety Certification in Automotive and Industrial 09 jun 2020
Functional safety information LP8867C-Q1, LP8869C-Q1 Functional Safety FIT Rate and Failure Mode Distribution 27 ene 2020
Application note Some Guidelines and Tips for the LED Driver Application 14 ago 2019

Diseño y desarrollo

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Placa de evaluación

LP8867Q1EVM — Módulo de evaluación de controladores LED de 4 canales para iluminación para automoción

The LP8867Q1EVM helps designers to evaluate the characteristics, operation, and use of the LP8867/9-Q1 device, a high-performance LED driver for automotive lighting. The LP8867/9-Q1 device is an easy-to-useLED driver with integrated DC-DC converter. The device also has four/three 120-mA (...)
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