Pin Function Grouping

flux

Done — I grouped the AL8866QSP-13 SO-8EP pins by their primary datasheet function, with no physical pin assigned to more than one group.
Assigned groups:
  • Power: VIN pin 1
  • Ground: GND / exposed pad pin 9
  • Current Sense: CSP pin 2, CS pin 7
  • Protection: OVP pin 4
  • Control: DIM pin 5
  • Compensation: COMP pin 6
  • Gate Drive: DRV pin 8
  • Fault: FLT pin 3
I also added concise datasheet-based pin descriptions for each terminal.
adrian95

adrian95

Make the functional group more general.

flux

I’ll simplify the functional group labels to broader categories while keeping each pin assigned only once.

flux

Done — I generalized the functional groups and verified each pin still appears in only one group.
Updated grouping:
  • Power: VIN
  • Ground: GND / EP
  • Analog: CSP, CS, OVP, COMP
  • Control: DIM, DRV, FLT
Run part review
Adjust pin types
Create application schematic
Add recommended passives
Prepare PCB footprint
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COMP
Pin Number
6
CS
Pin Number
7
GND
Pin Number
9
OVP
Pin Number
4
DRV
Pin Number
8
VIN
Pin Number
1
FLT
Pin Number
3
DIM
Pin Number
5
CSP
Pin Number
2
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AL8866QSP-13

AL8866QSP-13 thumbnail
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
#AL8866QSP13 #AL8866Q #DiodesIncorporated #LEDDriver #AutomotiveLED #AutomotiveElectronics #BuckConverter #BoostConverter #BuckBoostConverter #SEPICConverter #PowerElectronics #LEDLighting #ElectronicComponents #EngineeringSpecifications

Properties

AL8866QSP-13

Diodes

Integrated Circuit

diodes.com/datasheet/download/AL8866Q.pdf

U

parametric-v1

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