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IS31FL3199-QFLS2-TR
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ISSI Integrated Silicon Solution LED Drivers, UQFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownIS31FL3199-QFLS2-TR
ISSI Integrated Silicon Solution · LED Drivers · UQFN-20-EP(3x3)
IS31FL3199-QFLS2-TR from ISSI Integrated Silicon Solution, in a UQFN-20-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Power supply, 2.7V to 5.5V. |
| 2 | C_FILT | passive | Filter capacitor for audio control. |
| 3 | OUT1 | output | Current source output for channel 1, with output current set by the CS bits up to 40mA. |
| 4 | OUT2 | output | Current source output for channel 2, with output current set by the CS bits up to 40mA. |
| 5 | OUT3 | output | Current source output for channel 3, with output current set by the CS bits up to 40mA. |
| 6 | OUT4 | output | Current source output for channel 4, with output current set by the CS bits up to 40mA. |
| 7 | GND | power_in | Ground. |
| 8 | OUT5 | output | Current source output for channel 5, with output current set by the CS bits up to 40mA. |
| 9 | OUT6 | output | Current source output for channel 6, with output current set by the CS bits up to 40mA. |
| 10 | OUT7 | output | Current source output for channel 7, with output current set by the CS bits up to 40mA. |
| 11 | OUT8 | output | Current source output for channel 8, with output current set by the CS bits up to 40mA. |
| 12 | OUT9 | output | Current source output for channel 9, with output current set by the CS bits up to 40mA. |
| 13 | SDB | input | Shuts down the chip when pulled low (hardware shutdown, about 1µA typical). |
| 14 | I_AUD | bidirectional | Audio current input or output used for chip cascade synchronization of the audio current. |
| 15 | R_EXT | passive | Input terminal for an external resistor, which must be about 100kΩ. |
| 16 | AD | input | I2C address setting: connect to GND (00), VCC (11), SCL (01) or SDA (10). |
| 17 | IN | input | Audio input. |
| 18 | SCL | input | I2C serial clock. |
| 19 | SDA | bidirectional | I2C serial data, bidirectional open-collector with an external pull-up resistor (typically 4.7kΩ). |
| 20 | CLK/V_BM | bidirectional | CLK input or output for cascade synchronization of breathing; when the breathing mark function is enabled this pin is the V_BM output. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ISSI Integrated Silicon Solution |
| Package | UQFN-20-EP(3x3) |
| Category | LED Drivers |
| Pins | 21 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.7 | 5.5 | V | 5 | ||
| Quiescent power supply current | ICC | 3 | mA | VSDB = VCC | 5 | ||
| Shutdown current | ISD | 1 | μA | VSDB = 0V | 5 | ||
| Shutdown current (software shutdown) | ISD | 2 | μA | VSDB = VCC, software shutdown | 5 | ||
| Output current | IOUT | 20 | mA | PWM Control Mode, VDS = 0.4V, PWM Register(07h~0Fh) = 0xFF (Note 1) | 5 | ||
| Output current | IOUT | 18 | mA | Audio Mode, Gain = 12dB, VIN = 0.8VP-P, 1kHz square wave (Note 1) | 5 | ||
| Current sink headroom voltage | VHR | 400 | mV | IOUT = 20mA | 5 | ||
| Logic '0' input voltage | VIL | 0.4 | V | VCC = 2.7V | 5 | ||
| Logic '1' input voltage | VIH | 1.4 | V | VCC = 5.5V | 5 | ||
| Logic '0' input current | IIL | 5 | nA | VIN = 0V (Note 2: all LEDs are on) | 5 | ||
| Logic '1' input current | IIH | 5 | nA | VIN = VCC (Note 2: all LEDs are on) | 5 | ||
| Serial-clock frequency | fSCL | 400 | kHz | 6 | |||
| Bus free time between a STOP and a START condition | tBUF | 1.3 | μs | 6 | |||
| Hold time (repeated) START condition | tHD, STA | 0.6 | μs | 6 | |||
| Repeated START condition setup time | tSU, STA | 0.6 | μs | 6 | |||
| STOP condition setup time | tSU, STO | 0.6 | μs | 6 | |||
| Data hold time | tHD, DAT | 0.9 | μs | 6 | |||
| Data setup time | tSU, DAT | 100 | ns | 6 | |||
| SCL clock low period | tLOW | 1.3 | μs | 6 | |||
| SCL clock high period | tHIGH | 0.7 | μs | 6 | |||
| Rise time of both SDA and SCL signals, receiving | tR | 300 | ns | 20+0.1Cb, Cb = total bus line capacitance in pF (Note 4) | 6 | ||
| Fall time of both SDA and SCL signals, receiving | tF | 300 | ns | 20+0.1Cb, Cb = total bus line capacitance in pF (Note 4) | 6 | ||
| Voltage at any input pin | -0.3 | V | Upper limit printed as VCC+0.3V | 5 | |||
| Supply voltage | VCC | -0.3 | 6 | V | 5 | ||
| GND terminal current | 400 | mA | 5 | ||||
| Maximum junction temperature | TJMAX | 150 | °C | 5 | |||
| Storage temperature range | TSTG | -65 | 150 | °C | 5 | ||
| Operating temperature range | TA | -40 | 85 | °C | 5 | ||
| ESD (HBM) | 2 | kV | 5 | ||||
| ESD (CDM) | 1 | kV | 5 | ||||
| External resistor at R_EXT | R_EXT | 100 | kΩ | Must be about 100kΩ | 3 |
CAD (KiCad official)
- Symbol:
IS31FL3199-QFLS2-TR - Footprint:
Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm - 3D model: UQFN-20-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
is31fl3199-qfls2-tr-etched.step/is31fl3199-qfls2-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);is31fl3199-qfls2-tr.step/is31fl3199-qfls2-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ISSI Integrated Silicon Solution datasheet (15 pp, sha256
8fad1229fea67950, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).