LP8867-Q1中文资料具有电力线 FET 保护的高集成度 4 通道 120mA 汽车类 LED 驱动器数据手册TI规格书

描述 Description

The LP8867-Q1, LP8869-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 LP886x-Q1 to avoid disturbance for sensitive frequency band.

The input voltage range for the LP886x-Q1 is from 4.5 V to 40 V to support automotive start-stop and load dump condition. The LP886x-Q1 integrates extensive fault detection features.

特性 Features

• AEC-Q100 Qualified for automotive applications:
• Functional safety capable
• 3-, 4-Channel 120-mA current sinks
• Current matching 1% (typical)
• Outputs can be combined externally for higher current per string
• Integrated boost and SEPIC converter for LED string power
• Output voltage up to 45 V
• Switching frequency 300 kHz to 2.2 MHz
• Spread spectrum for lower EMI
• Fault detection and protection
• Input voltage OVP, UVLO and OCP
• LED open and short fault detection
• Automatic LED current reduction with external temperature sensor
• Thermal shutdown