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PG1288

1-wire RGB · Honglitronic · honglitronic

Channels
RGB
Bits / channel
8
Supply
3–7.5 V
PWM
1.2 kHz
Backup data
no
Packages
1

The only driver IC in this batch whose sheet names a part number for it: PG1288, “a three-channel LED driver IC with a built-in MCU digital interface, data latches and LED drivers”. Its maker is not named. The sheet is an IC datasheet re-badged for the LED: the pin list on page 2 is the 8-pin driver (OUTR, OUTG, OUTB, GND, DOUT, DIN, NC, VDD), the die pad map on page 7 shows the bare chip (577 x 593 um) and the application circuit on page 6 drives separate LEDs from an 8-pin package. Only page 7 carries the LED outline and 4-pin numbering.

Datasheets disagree with themselves: the function description says the output period is 4 ms while the table says 1.2 kHz PWM; the page-2 pinout (8 pins) is the driver, not the 4-pin LED, whose own numbering is given only in the outline drawing.

Refresh & flicker

PWM 1.2 kHz, quiescent 1.0 mA, 800 kbps, DIN to DOUT delay at most 500 ns, 12 mA per channel by default, input thresholds 0.7 / 0.3 x VDD (page 4). The function description on the same page says the PWM signal period is 4 ms, which is not 1.2 kHz; the table figure is recorded.

Timing

PG1288 bit timingPG1288 bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 900 high then 300 low; tolerance plus or minus 50 nanoseconds; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 ±50 nsT1H 900 ±50 nsT0L 900 ±50 nsT1L 300 ±50 ns"0" bit"1" bit020040060080010001200140016001800200022002400time, ns± tolerance on each falling edge2 · One frame: 24 bits, most-significant bit firstDIN170110010007100110101700101100bitch 1 · 8 bitsch 2 · 8 bitsch 3 · 8 bitsChannel order not recorded for this protocol · frame = 24 × ~1200 ns ≈ 28.8 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 24 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 24, and so on. The last LED's DOUT is left unconnected.
T0H 300 / T0L 900 · T1H 900 / T1L 300 ns · ±50 ns · period 1200 ns · reset 80 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 900 ns 900 ns 300 ns 1200 ns 833 kHz 80 µs 50 ns
Typical values with a +/-0.05 us tolerance: T0H 0.3, T1H 0.9, T0L 0.9, T1L 0.3 us; reset at least 80 us. Data is 24 bits, high bit first, in RGB order (page 6) - not the GRB order of the WS2812 family.

Library support

Not checked against library 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.

  • 2020-09-13 datasheet revision Honglitronic HL-5050RGB-IC-S1-HL specification, Rev. 01, date on the cover ↗ day