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Inolux PI RGBW (single-trace IC, 32 bit)

1-wire RGBW · Inolux Corporation · inolux

Channels
RGBW
Bits / channel
8
Supply
3.7–5.5 V
PWM
1.2 kHz
Backup data
no
Packages
2

The RGBW sibling of inolux-pi in the 5050 (PI55QA) and 3537 (PI33QB) packages. The part-number suffix ‘PW-XX’ (-30 / -40 / -60) is not explained in words; the sheet’s colour table lists cool white 6000 K, neutral white 4000 K and warm white 3000 K at 12 mA, which is the likely meaning, but it is never stated.

Refresh & flicker

Same cell as inolux-pi with a fourth (white) channel: 32 bit per pixel sent G, R, B, W with the MSB first (sheet figure ‘The data structure of 32bit’). PWM 1.2 kHz, static current 1 mA, DIN thresholds 0.7 / 0.3 VDD. R/G/B channels 12 mA (8-9 mA on the Iout test line), white 16.5-18 mA.

Timing

Inolux PI RGBW (single-trace IC, 32 bit) bit timingInolux PI RGBW (single-trace IC, 32 bit) bit timing: a zero bit is 300 nanoseconds high then 800 low; a one bit is 750 high then 200 low; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1100 nsbit 1 period 950 nsT0H 300 nsT1H 750 nsT0L 800 nsT1L 200 ns"0" bit"1" bit0200400600800100012001400160018002000time, nsDatasheet lists unequal bit periods (1100 vs 950 ns); each bit is drawn with its own.2 · One frame: 32 bits, most-significant bit firstDIN1701100100071001101017001011001711000010bitch 1 · 8 bitsch 2 · 8 bitsch 3 · 8 bitsch 4 · 8 bitsChannel order not recorded for this protocol · frame = 32 × ~1100 ns ≈ 35.2 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 32 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 32, and so on. The last LED's DOUT is left unconnected.
T0H 300 / T0L 800 · T1H 750 / T1L 200 ns · reset 80 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 800 ns 750 ns 200 ns 1200 ns 833 kHz 80 µs —
Window table: T min 1.20 us; T0H 0.2 / 0.3 / 0.4 us; T0L min 0.8 us; T1H 0.62 / 0.75 / 1.0 us; T1L min 0.2 us; reset >80 us. T0L and T1L are minimums. The PI33QB sheets (C22148673, 2020-08-10) print T0H 0.2 / 0.32 / 0.4 and T1H 0.58 / 0.64 / 1.0 us instead.

Clones & compatibility

“Compatible” is never stated bare here — each relationship carries how strong the claim is, and what bites if you assume too much.

  • protocol compatible SK6812 RGBW

    Frame layout only: 32 bit, G R B W, MSB first, one wire, which is the layout the sk6812-rgbw protocol records. The typical T1H here is 750 ns (640 on the PI33QB sheet), not the 600 ns of the SK6812 rev. 02 table. The Inolux sheets never name SK6812. source ↗

Library support

Not checked against FastLED, Adafruit or WLED source.

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.

  • 2018-05-31 datasheet revision Inolux IN-PI55QATPRPGPBPW-XX revision table: 'Initial Release 1.0 05-31-2018' ↗ day