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.
A

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
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Files

Pins

Symbol

Layout

3D View

Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
Pin Description
VIN
1
Power In
Power
Power
Top
1
Input voltage; decouple to ground with 1µF or higher X7R ceramic capacitor close to device.
CSP
2
Input
Analog
Analog
Left
2
Current sense amplifier positive input; connect current sense resistor from CSP to VIN for current sense control.
FLT
3
Output
Control
Control Bus
Left
4
Fault report output; asserted low and requires an external pull-up resistor.
OVP
4
Input
Analog
Analog
Right
2
Output overvoltage and undervoltage protection input; connect to resistive divider or LED voltage sense circuit.
DIM
5
Input
Control
Control Bus
Left
4
Multifunction on/off and brightness control input for DC/PWM dimming or soft-start capacitor connection.
COMP
6
Output
Analog
Analog
Right
2
Compensation output; connect compensation network for desired closed-loop response.
CS
7
Input
Analog
Analog
Right
2
Switch current sense input; connect to switch sense resistor to set switch current limit and support slope compensation programming.
DRV
8
Output
Control
Control Bus
Left
4
N-channel MOSFET gate driver output; connect to external main switching MOSFET gate.
GND
9
Power In
Ground
Ground
Bottom
5
Exposed pad ground for SO-8EP; must connect to GND.

AL8866QSP-13