LED Driver IC 1 Output DC DC Controller SEPIC, Step-Down (Buck), Step-Up (Boost) Analog, PWM Dimming 8-SO-EP
AL8866QSP-13 Engineering Specifications
General Description
The AL8866QSP-13 is an automotive-qualified, multi-topology DC-switching LED controller manufactured by Diodes Incorporated. It is designed to control an external power MOSFET for high-power automotive LED lighting systems.
The device supports buck, boost, buck-boost and single-ended primary-inductance converter configurations. Its wide input-voltage range makes it suitable for automotive power systems and various high-voltage LED applications.
The controller uses fixed-frequency peak current-mode regulation with spread-spectrum frequency modulation to reduce electromagnetic interference. It supports both analog and pulse-width-modulation dimming through the DIM input.
An integrated programmable soft-start function gradually increases the inductor and switching currents during startup to reduce output-voltage and current stress. The open-drain fault output provides system-level fault reporting for abnormal operating conditions.
Engineering Specifications
Manufacturer: Diodes Incorporated
Manufacturer Part Number: AL8866QSP-13
Component Type: Automotive LED driver controller
Converter Topologies: Buck, boost, buck-boost and SEPIC
Control Architecture: Fixed-frequency peak current-mode control
External Switching Device: External power MOSFET
Minimum Input Voltage: Four point seven volts
Maximum Input Voltage: Eighty-five volts
Maximum Output Voltage: Eighty-five volts
Switching Frequency: Four hundred kilohertz
Frequency Modulation: Spread-spectrum modulation for reduced electromagnetic interference
LED Current Control: External current-sense resistor and external MOSFET configuration
Feedback Voltage: Two hundred millivolts
Typical Quiescent Current: One point eight milliamperes
Typical Efficiency: Up to approximately ninety-three percent, depending on the application circuit and external components
Dimming Methods: Analog dimming and pulse-width-modulation dimming
Analog Dimming Range: One percent to one hundred percent
Analog Dimming Dynamic Range: Greater than one hundred to one
Pulse-Width-Modulation Dimming Ratio: One hundred to one at a two-hundred-hertz dimming frequency
Pulse-Width-Modulation Frequency Range: Approximately one hundred hertz to one kilohertz
Full-Brightness Current Accuracy: Approximately plus or minus three percent
Low-Level Dimming Current Accuracy: Approximately plus or minus twelve percent at twenty-percent dimming
Soft-Start Function: Externally programmable
Fault Output: Active-low open-drain fault indicator
Protection Features: Output overvoltage protection, LED open-circuit protection, output undervoltage protection, LED short-circuit protection, cycle-by-cycle overcurrent limitation, current-sense resistor short-circuit protection, inductor and diode short-circuit detection, diode open-circuit protection and thermal shutdown
Automotive Qualification: AEC-Q100 Grade One qualified
Automotive Documentation: PPAP capable
Manufacturing Standard: Manufactured in IATF-certified automotive facilities
Operating Temperature Range: Minus forty degrees Celsius to positive one hundred twenty-five degrees Celsius
Package Type: Thermally enhanced SO-8 exposed-pad package
Pin Count: Eight leads with exposed thermal ground pad
Mounting Style: Surface mount
Packing Method: Thirteen-inch tape and reel
Standard Packing Quantity: Two thousand five hundred components per reel
Moisture Sensitivity: Level One
Terminal Finish: Matte-tin-plated leads
Environmental Compliance: Lead-free, RoHS compliant, halogen-free and antimony-free
Typical Applications
Automotive high-beam and low-beam lighting
Automotive daytime running lights
Automotive fog lights
Automotive turn-signal lights
Automotive position lights
Automotive brake and stop lights
High-power exterior LED lighting
Multi-topology automotive LED driver modules
