External‑IC strips are commonly used in 12 V / 24 V systems and typically follow a 1 IC : 3 LED, 1 IC : 6 LED, or 1 IC : 12 LED grouping ratio.
The most common type. Only 3 wires are required: VCC, DIN, GND.
The IC receives a serial data stream and forwards it to the next pixel.
|
IC Model |
Voltage |
Typical Grouping |
Notes |
|---|---|---|---|
|
WS2811 |
5 V / 12 V / 24 V |
1 IC : 3 LED (12 V) |
Most popular, cost‑effective |
|
UCS1903 / UCS1903B |
12 V / 24 V |
1 IC : 3 LED or 1 IC : 6 LED |
WS2811‑compatible protocol |
|
SM16703 / SM16704 |
12 V / 24 V |
1 IC : 3 LED |
Stable, widely used in engineering |
|
TM1809 / TM1812 |
12 V / 24 V |
1 IC : 3–12 LED |
Supports multi‑channel grouping |
|
TM1803 / TM1804 |
5 V / 12 V |
1 IC : 3 LED |
Early single‑wire ICs |
|
WS2814A (external) |
12 V / 24 V |
1 IC : 3 LED |
RGBW 4‑channel, single‑wire |
|
UCS2904B / SM16714 / TM1824 |
12 V / 24 V |
1 IC : 3 LED |
RGBW external single‑wire ICs |
Characteristics: Simple wiring, but if one IC fails, downstream pixels may lose signal.
Based on single‑wire protocol but adds a BI / Backup line. If a pixel is damaged, the signal can bypass it and continue to the next pixel.
|
IC Model |
Voltage |
Notes |
|---|---|---|
|
WS2818 / WS2818B |
12 V / 24 V |
Industry standard for breakpoint continuation |
|
TM1934 / TM1936 |
12 V / 24 V |
High refresh, breakpoint support |
|
TM1914A |
12 V / 24 V |
RGBW version with backup line |
|
GS8208 / GS8206 |
12 V / 24 V |
High‑performance breakpoint ICs |
|
FW1934 / FW1935 |
12 V / 24 V |
Fuman micro‑series |
|
SK9813 external |
5 V / 12 V |
Less common, dual‑data variant |
Application: Building outlines, long‑term outdoor lighting, reduced maintenance.
Uses DATA + CLK lines (true SPI). Offers high refresh rates and no camera flicker, ideal for LED screens, stage lighting, and video synchronization.
|
IC Model |
Voltage |
Grouping |
Notes |
|---|---|---|---|
|
APA102 |
5 V |
1 IC : 1 LED |
High‑speed SPI, global brightness control |
|
LPD8806 |
5 V / 12 V |
1 IC : 2 RGB |
Classic SPI driver |
|
LPD6803 |
5 V |
1 IC : 1 LED |
Early SPI IC |
|
WS2801 |
5 V |
1 IC : 1 LED |
Widely used in early LED strips |
|
SK9822 / HD107S |
5 V |
1 IC : 1 LED |
Improved APA102‑compatible ICs |
Note: Controllers must support CLK+DATA output; not compatible with standard WS2811 ports.
Directly supports DMX512 protocol for professional lighting consoles.
|
IC Model |
Voltage |
Notes |
|---|---|---|
|
TM512 series |
12 V / 24 V |
DMX512 pixel driver |
|
UCS512 series |
12 V / 24 V |
DMX512 decoder IC |
|
DMX external decoder + RGB strip |
12 V / 24 V |
Uses a separate DMX decoder board |
Application: Stage lighting, landmarks, professional DMX control systems.
|
Voltage |
Typical ICs |
Common Grouping |
|---|---|---|
|
5 V |
TM1809, TM1812, APA102 |
1 IC : 1 LED |
|
12 V |
WS2811, UCS1903, SM16703, TM1814, WS2818 |
1 IC : 3 LED |
|
24 V |
UCS1903B, SM16703P, TM1814, TM1934, FW1934 |
1 IC : 6 LED or 1 IC : 12 LED |
Pixel granularity:
1 IC : 1 LED — Rare for external IC (built‑in IC preferred)
1 IC : 3 LED — Most common for 12 V strips
1 IC : 6 LED — Common for 24 V strips
1 IC : 12 LED — Used in large‑group TM1812 systems
|
Application |
Recommended IC |
|---|---|
|
Home / DIY short runs |
WS2812B / SK6812 (built‑in IC) |
|
12 V long runs, cost‑sensitive |
WS2811 |
|
Pure white requirement |
TM1814 / WS2814A / UCS2904B |
|
Engineering, fault tolerance |
WS2818 / TM1934 / GS8208 |
|
LED screens, high‑speed video |
APA102 / SK9822 / LPD8806 |
|
Stage, professional console |
DMX512 + TM512 / UCS512 |
