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Nationstar FC-RGBC4020 IC (unnamed)

1-wire RGB · Nationstar · nationstar

Channels
RGB
Bits / channel
8
Supply
4–5.5 V
PWM
4 kHz
Backup data
no
Packages
1

The driver in Nationstar’s FC-RGBC4020-A1 (LCSC lists it among plain RGB LEDs). The sheet is a “TOP Light Emitting Diode” sheet - its overview text is the generic indicator-LED paragraph - but its pin table (DI, VDD, DO, GND), its “single-wire return-to-zero” coding description and its 24-bit data structure make it an addressable part. No IC is named.

Datasheets disagree with themselves: the coding paragraph (page 5) says the chip latches data when it sees a low of 80 us or more, while the timing table gives Trst above 200 us; the maximum table says 3.0-7.5 V logic supply and a 9 V output rating while the electrical table says 7.5 V and 9.5 V; the “low-level input” unit in the recommended-conditions table is printed as mA. The coding paragraph’s “4 kHz” PWM agrees with the table.

Refresh & flicker

PWM 3 kHz minimum / 4 kHz typical, idle current 0.4 / 0.65 / 0.9 mA, data rate up to 1100 kHz, DIN to DOUT delay at most 200 ns, output current 9.6 / 12 / 14.4 mA per colour, DOUT drive +15 / -30 mA (page 5). Recommended supply 4-5.5 V (5 V typical); the chip-input row says 5 V typical / 7.5 V maximum, and the absolute maximum is 3.0-7.5 V. RGB output pin withstand 9.5 V (table) or 9 V (maximum).

Timing

Nationstar FC-RGBC4020 IC (unnamed) bit timingNationstar FC-RGBC4020 IC (unnamed) 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 200 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 ≥ 200 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 200 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 900 ns 900 ns 300 ns 1200 ns 833 kHz 200 µs 50 ns
T0H 0.3, T0L 0.9, T1H 0.9, T1L 0.3 us, each +/-0.05 us; symbol period at least 1.2 us; reset above 200 us. The sheet says the RESET code is a low of at least 80 us in the description paragraph and above 200 us in the table - see the notes. 24 bits, high bit first, G, R, B order (page 7).

Clones & compatibility

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

  • electrically similar Meihua MHP1515 IC (unnamed)

    Same typical timing (300 / 900 / 900 / 300 ns +/-50 ns) and reset above 200 us as the Meihua MHP1515 sheet; Nationstar sends GRB where Meihua says RGB. Neither sheet names an IC or says one is derived from the other. source ↗

  • electrically similar SK6805

    Inferred from the numbers only; the Nationstar sheet never names OPSCO. Its typical timing (300 / 900 / 900 / 300 ns) and 200 us reset equal the typical figures printed for SK6805-EC15; the tolerance is +/-50 ns where OPSCO prints a wider window, supply is 4-5.5 V, and the output is 12 mA (SK6805: 5 mA). source ↗

  • electrically similar of this Nationstar FC-RGBC3228 IC (unnamed)

    Same timing table, reset and GRB order in the two Nationstar sheets of the same date; the 3228 sheet's IC table differs (11.5 mA output against 12 mA, 4.5 kHz PWM against 4 kHz, 3.5-5.5 V supply against 4-5.5 V, 80 ns delay against 200 ns maximum). Kept separate because the electrical tables differ.

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.

  • 2023-06-16 datasheet revision Nationstar FC-RGBC4020-A1 specification, release date (发放日期) on the cover; version C0 ↗ day