component
LP55231SQE
Public Made by Adomby adom
Texas Instruments LED Drivers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLP55231SQE
Texas Instruments · LED Drivers · WQFN-24-EP(4x4)
LP55231SQE from Texas Instruments, in a WQFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C2+ | tri_state | Flying capacitor 2 positive terminal; connect to 0.47 µF ceramic capacitor. |
| 2 | C1+ | tri_state | Flying capacitor 1 positive terminal; connect to 0.47 µF ceramic capacitor. |
| 3 | VDD | power_in | Power supply input, 2.7 V to 5.5 V operating range. |
| 4 | GND | power_in | Ground reference pin. |
| 5 | EN | input | Enable input; pull high to enable device operation, low for standby mode. |
| 6 | CLK | input | 32 kHz clock input for program execution; connect to GND if not used. |
| 7 | INT | tri_state | Open-drain interrupt output for microcontroller to signal program completion; can be left unconnected. |
| 8 | SDA | tri_state | I²C serial data line, open-drain with external pullup; 0 V to VEN logic levels. |
| 9 | SCL | input | I²C serial clock line, input only; 0 V to VEN logic levels. |
| 10 | TRIG | tri_state | Open-drain trigger input/output for device synchronization; connect to GND if not used. |
| 11 | D9 | output | Current source output 9 powered from VDD, 0 to 25.5 mA maximum. |
| 12 | D8 | output | Current source output 8 powered from VDD, 0 to 25.5 mA maximum. |
| 13 | D7 | output | Current source output 7 powered from VDD, 0 to 25.5 mA maximum. |
| 14 | D6 | output | Current source output 6 powered from VOUT, 0 to 25.5 mA maximum. |
| 15 | D5 | output | Current source output 5 powered from VOUT, 0 to 25.5 mA maximum. |
| 16 | D4 | output | Current source output 4 powered from VOUT, 0 to 25.5 mA maximum. |
| 17 | D3 | output | Current source output 3 powered from VOUT, 0 to 25.5 mA maximum. |
| 18 | D2 | output | Current source output 2 powered from VOUT, 0 to 25.5 mA maximum. |
| 19 | D1 | output | Current source output 1 powered from VOUT, 0 to 25.5 mA maximum. |
| 20 | ASEL0 | input | Address select input 0; set with ASEL0 and ASEL1 to define I²C slave address (GND/GND = 0x32). |
| 21 | ASEL1 | input | Address select input 1; set with ASEL0 and ASEL1 to define I²C slave address (GND/GND = 0x32). |
| 22 | VOUT | power_out | Charge pump output, regulated to 4.5 V typical in 1.5x mode or VDD in 1x mode. |
| 23 | C2− | tri_state | Flying capacitor 2 negative terminal; connect to 0.47 µF ceramic capacitor. |
| 24 | C1− | tri_state | Flying capacitor 1 negative terminal; connect to 0.47 µF ceramic capacitor. |
| 25 | DAP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-24-EP(4x4) |
| Category | LED Drivers |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
LP55231SQE - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm - 3D model: WQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
lp55231sqe-etched.step/lp55231sqe-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp55231sqe.step/lp55231sqe.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (58 pp, sha256
e7be81a7ed929d56, retrieved 2026-09-27, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).