LP8864-Q1中文资料具有 4 个 200mA 通道的汽车显示 LED 背光驱动器数据手册TI规格书

描述 Description

The LP8864-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 LP8864-Q1 to avoid disturbance for AM radio band.

The LP8864-Q1 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.

特性 Features

• AEC-Q100 qualified for automotive applications:
• Device HBM ESD classification level 2
• Input voltage operating range 3 V to 48 V
• Up to 200-mA DC current for each current sink
• Dimming ratio 32 000:1 using 152-Hz LED output PWM frequency
• 8 Configurable LED strings configuration
• Auto-phase shift PWM dimming
• Up to 48-V VOUT boost or SEPIC DC/DC controller
• Boost spread spectrum for reduced EMI
• Output voltage automatically discharged when boost is disabled
• Extensive fault diagnostics