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Xinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table)

1-wire W · Xinglight · xinglight

Channels
W
Bits / channel
8
Supply
3.5–7.5 V
PWM
4 kHz
Backup data
no
Packages
2

No datasheet names the driver IC or its maker: the sheets are Xinglight letterhead documents titled with the SKU only, so this protocol is defined by the figures the sheets print (supply, per-channel current, timing table, pin set), not by a known die.

Channels: the sheets describe three dies of one colour family (3535UWC: “WWW” white; 5050WYWWC: yellow, white and warm-white, “W Y WW” order) driven by the same 24-bit frame, one 8-bit value per die. The catalogue has no three-channel white option, so channels: W is the closest value; it does not mean a single dimmable channel.

Datasheets disagree: the 3535UWC sheet prints “WWW” as the transmit order on p6 but its note ends “in the order of GrB”; the 5050YWWWC-12V sheet prints “YWWW” (four letters) for a 24-bit frame. Colour order is recorded as sheet-stated, not resolved.

Refresh & flicker

FPWM 4 kHz, FOSC 800 kHz (max 1100 kHz), static current 0.3 mA, propagation delay 500 ns max (3535UWC sheet C51900947).

Timing

Xinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table) bit timingXinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table) bit timing: a zero bit is 295 nanoseconds high then 595 low; a one bit is 595 high then 295 low; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 890 nsbit 1 period 890 nsT0H 295 nsT1H 595 nsT0L 595 nsT1L 295 ns"0" bit"1" bit02004006008001000120014001600time, ns2 · One frame: 8 bits, most-significant bit firstDIN1701100100bitch 1 · 8 bitsChannel order not recorded for this protocol · frame = 8 × ~890 ns ≈ 7.1 µs · example data, first bits 1 0 1 …3 · RESET / latchlast bits of frame 1first bits of frame 2LEDs latch the data they receivedRESET: DIN low ≥ 80 µs (not to scale)4 · Cascade: each DOUT feeds the next DINMCULED 1DINDOUTLED 2DINDOUTLED NDINDOUTLED 1 keeps the first 8 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 8, and so on. The last LED's DOUT is left unconnected.
T0H 295 / T0L 595 · T1H 595 / T1L 295 ns · period 890 ns · reset 80 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 295 ns 595 ns 595 ns 295 ns 890 ns 1124 kHz 80 µs —
Only a typical column is printed: Tin0h 0.295, Tin1h 0.595, T0L 0.595, T1L 0.295 us, cycle min 0.89 us, reset min 80 us; low time of a bit must stay under 15 us. Same figures as xl-2812b-sk5v, but the sheets give a 3.5-7.5 V supply range where the 5050 RGB sheets give 3.5-5.5 V.

Library support

Not checked against any library. The sheets state a 24-bit (32-bit for IC-01W) frame sent high bit first at 800 kbps.

Parts using this protocol

Dating evidence

Evidence, not a release date. A library commit proves the part existed by that date and says nothing about how long before.

  • 2025-10-15 estimate PDF CreationDate metadata of Xinglight sheet XL-3535UWC-2812B (LCSC C51900947); the sheet has no revision table, so this is only the date the PDF file was produced ↗ day