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Controladores para LED en automóviles

LP8864S-Q1

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Retroiluminación LED para pantallas de automóviles con cuatro canales de 150 mA

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LP8864S-Q1

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Detalles del producto

Number of channels 4 Topology Boost with Current Sink, SEPIC Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 3 Vin (max) (V) 48 Vout (min) (V) 0 Vout (max) (V) 48 Iout (max) (A) 0.6 Iq (typ) (mA) 20 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Enable/Shutdown, Fault Detection, Fault Diagnostic, Global dimming, Hybrid Dimming/Phase Shift, I2C control, LED Open Detection, LED Short to Ground Detection, LED Shorted Detection, PWM Dimming, Power-Line FET, SEPIC Sync, Soft Start, Spread Spectrum, Thermal shutdown
Number of channels 4 Topology Boost with Current Sink, SEPIC Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 3 Vin (max) (V) 48 Vout (min) (V) 0 Vout (max) (V) 48 Iout (max) (A) 0.6 Iq (typ) (mA) 20 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Enable/Shutdown, Fault Detection, Fault Diagnostic, Global dimming, Hybrid Dimming/Phase Shift, I2C control, LED Open Detection, LED Short to Ground Detection, LED Shorted Detection, PWM Dimming, Power-Line FET, SEPIC Sync, Soft Start, Spread Spectrum, Thermal shutdown
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4 VQFN (RHB) 32 25 mm² 5 x 5
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Input voltage operating range 3V to 48V
  • Four high-precision current sinks
    • Up to 150mA DC current for each current sink
    • Current matching 1% (typical)
    • Dimming ratio 32 000:1 using 152Hz LED output PWM frequency
    • Up to 16-bit LED dimming resolution with I2C, or PWM input
    • 8 Configurable LED strings configuration
  • Auto-phase shift PWM dimming
  • 12-bit analog dimming
  • Up to 48V VOUT boost or SEPIC DC/DC controller
    • Switching frequency 100kHz to 2.2MHz
    • Boost spread spectrum for reduced EMI
    • Boost sync input to set boost switching frequency from an external clock
    • Output voltage automatically discharged when boost is disabled
  • Extensive fault diagnostics
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Input voltage operating range 3V to 48V
  • Four high-precision current sinks
    • Up to 150mA DC current for each current sink
    • Current matching 1% (typical)
    • Dimming ratio 32 000:1 using 152Hz LED output PWM frequency
    • Up to 16-bit LED dimming resolution with I2C, or PWM input
    • 8 Configurable LED strings configuration
  • Auto-phase shift PWM dimming
  • 12-bit analog dimming
  • Up to 48V VOUT boost or SEPIC DC/DC controller
    • Switching frequency 100kHz to 2.2MHz
    • Boost spread spectrum for reduced EMI
    • Boost sync input to set boost switching frequency from an external clock
    • Output voltage automatically discharged when boost is disabled
  • Extensive fault diagnostics

The LP8864S-Q1 is an automotive high-efficiency LED driver with boost controller. The Four high-precision current sinks support phase shifting that is automatically adjusted based on the number of channels in use. LED brightness can be controlled globally through the I²C interface or PWM input.

The boost controller has adaptive output voltage control based on the headroom voltages of the LED current sinks. This feature minimizes the power consumption by adjusting the boost voltage to the lowest sufficient level in all conditions. A wide-range adjustable frequency allows the LP8864S-Q1 to avoid disturbance for AM radio band.

The LP8864S-Q1 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.

The LP8864S-Q1 is an automotive high-efficiency LED driver with boost controller. The Four high-precision current sinks support phase shifting that is automatically adjusted based on the number of channels in use. LED brightness can be controlled globally through the I²C interface or PWM input.

The boost controller has adaptive output voltage control based on the headroom voltages of the LED current sinks. This feature minimizes the power consumption by adjusting the boost voltage to the lowest sufficient level in all conditions. A wide-range adjustable frequency allows the LP8864S-Q1 to avoid disturbance for AM radio band.

The LP8864S-Q1 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.
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* Data sheet LP8864S-Q1 Automotive Display LED-backlight Driver with Four 150 mA Channels datasheet (Rev. B) PDF | HTML 07 may 2024
Application note LP886x-Q1 Feedback Resistor Design Considerations PDF | HTML 12 may 2021
Application note LP8864-Q1, LP8864S-Q1, LP8866-Q1, and LP8866S-Q1 Diagnostic Description and Faul PDF | HTML 16 jul 2020

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Placa de evaluación

LP8864EVM — Módulo de evaluación del controlador LED LP8864-Q1 para pantallas de automóviles de 4 canales

El LP8864EVM ayuda a los diseñadores a evaluar las características, el funcionamiento y el rendimiento del producto LP8864 (S)-Q1, un controlador LED de alta eficiencia de 4 canales para la retroiluminación LED de pantallas automotrices. El producto LP8864 (S)-Q1 integra un controlador elevador o (...)
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