IS31FL3196A-QFLS2-TR - 6-Ch Fun/RGB LED Driver, I2C | Lumissil
MPN: IS31FL3196A-QFLS2-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.92 | $92.00 |
| 500 | $0.74 | $370.00 |
| 1,000 | $0.62 | $620.00 |
| 3,000 | $0.51 | $1,530.00 |
IS31FL3196A-QFLS2-TR Overview
An LED driver IC is an integrated circuit that sinks or sources regulated current through one or more LEDs, providing brightness control, dimming, and animation effects. LED drivers fall into the broader power management IC category and include linear (constant-current) regulators and switching (inductive or charge-pump) regulators. The IS31FL3196A is a linear current-sink driver, meaning each output regulates current by dropping the excess voltage across an internal MOSFET, making it ideal for low-noise, low-EMI applications where efficiency is secondary to simplicity and small PCB area.
Key features include automatic and semi-automatic breathing patterns (pre-established, system-free), I2C control via a 7-bit slave address with SCL/SDA pins, an SDB rising-edge reset, and a cascade-capable design for synchronizing multiple devices. Internal current sinks are programmable in 8 steps, and each channel supports 256 PWM levels for smooth dimming. An integrated audio AGC mode modulates LED brightness from an external audio source, eliminating the MCU overhead for music-driven light effects.
The architecture combines a serial I2C controller, a 6-channel constant-current sink array, an internal bandgap reference for current accuracy, and a built-in pattern generator for autonomous breathing effects. The exposed-pad QFN-20 package provides a low thermal resistance path for the internal MOSFETs, allowing sustained full-current operation without external heatsinking. The device supports industrial temperature range operation and ships in tape-and-reel packaging for high-volume SMT assembly.
Typical applications include mobile phone notification LEDs, smart wearable indicators, Bluetooth speaker light shows, IoT device status displays, gaming peripherals, and decorative RGB lighting strips. Its small 3 mm x 3 mm footprint suits space-constrained designs such as in-ear headphone cases and AR/VR accessory indicators.
When designing with the IS31FL3196A, ensure that VLED is sufficiently higher than the LED forward voltage to keep the current sink in regulation; insufficient headroom causes channel-to-channel brightness mismatch. Decouple VCC with at least 1 uF of ceramic capacitance placed close to the pin, and route SDA/SCL away from switching nodes.
This page synthesizes distributor pricing, drop-in alternatives from the same Lumissil family and cross-brand sources, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for IS31FL3196A-QFLS2-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
IS31FL3196A-QFLS2
✅ Drop-In📋 Reference alternative (not in catalog)
IS31FL3196C-QFLS2-TR
✅ Drop-In📋 Reference alternative (not in catalog)
IS31FL3235A-QFLS2-TR
✅ Drop-In📋 Reference alternative (not in catalog)
IS31FL3196-QFLS2-TR
✅ Drop-In📋 Reference alternative (not in catalog)
IS31FL3194-QFLS2-TR
✅ Drop-In📋 Reference alternative (not in catalog)
IS31FL3196A-QFLS2-TR Maximum Ratings & Electrical Characteristics
| Topology | 6-Channel Linear Current Sink |
| Number of Outputs | 6 |
| Output Current per Channel | 40 mA (max) |
| Programmable Current Levels | 8 steps |
| PWM Dimming Resolution | 256 steps per channel |
| Supply Voltage (VCC) | 2.7 V to 5.5 V |
| Interface | I2C (Standard / Fast / Fast-Plus) |
| I2C Slave Address | 7-bit (A7:A1), A0 selectable |
| Reset | SDB rising edge |
| Built-in Patterns | Breathing, automatic and semi-automatic |
| Audio Mode | Yes, with AGC function |
| Cascade Support | Yes (multiple devices) |
| Package | 20-pin QFN (3 mm x 3 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | Industrial (per partstack listing) |
| Package Code (JEDEC) | HVQCCN |
| RoHS Status | Compliant (per DigiKey listing) |
IS31FL3196A-QFLS2-TR Pin Configuration
| Pin 1 | OUT1 — Current sink output 1 |
| Pin 2 | OUT2 — Current sink output 2 |
| Pin 3 | OUT3 — Current sink output 3 |
| Pin 4 | OUT4 — Current sink output 4 |
| Pin 5 | OUT5 — Current sink output 5 |
| Pin 6 | OUT6 — Current sink output 6 |
| Pin 7 | AUDIO — Audio input for AGC mode |
| Pin 8 | GND — Ground |
| Pin 9 | NC — Not connected (per datasheet) |
| Pin 10 | SDB — Shutdown / I2C reset, active low |
| Pin 11 | SDA — I2C data |
| Pin 12 | SCL — I2C clock |
| Pin 13 | A0 — I2C address select bit 0 |
| Pin 14 | VCC — Supply voltage 2.7V-5.5V |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
IS31FL3196A-QFLS2-TR is suitable for 6 applications: Mobile Phone Notification LEDs, Bluetooth Speaker Light Shows, Wearable Fitness Tracker Indicators, IoT Smart-Home Status Displays, Gaming Keyboard RGB Backlighting, AR/VR Accessory Indicators.
Mobile Phone Notification LEDs
The IS31FL3196A's 3 mm x 3 mm QFN-20 footprint and 40 mA per-channel drive make it ideal for mobile phone notification RGB indicators where PCB area is at a premium. With 6 independently controlled outputs, designers can drive two RGB indicators plus a single status LED from a single chip, replacing 3 discrete driver circuits. The 2.7 V to 5.5 V supply range matches Li-ion battery voltages directly, eliminating boost converters. The built-in breathing patterns offload animation timing from the host MCU, reducing firmware complexity. Audio AGC mode enables call-progress or notification-ringtone visual feedback with no additional DSP processing.
Recommended
Bluetooth Speaker Light Shows
The IS31FL3196A's integrated audio mode with automatic gain control (AGC) is purpose-built for Bluetooth speaker light shows, where LEDs react to music playback without MCU audio processing. The AGC adjusts sensitivity automatically so that quiet passages still produce visible effects and loud peaks do not saturate the output. Six channels can drive two RGB rings or one RGB strip plus accent LEDs, with 256-step PWM providing smooth color transitions. The cascade feature allows multiple IS31FL3196A devices to synchronize across stereo speakers for unified animation. The QFN-20 package fits inside typical 50 mm-diameter speaker enclosures with minimal thermal rise even at full output.
Recommended
Wearable Fitness Tracker Indicators
For wearable fitness trackers, the IS31FL3196A delivers six low-current LED channels in a 3 mm x 3 mm footprint that fits inside wristband modules. With 8 programmable current levels (each below 40 mA), the driver can dim LEDs for low-power always-on heart-rate or step-goal indicators while still supporting bright notification flashes when needed. The I2C interface shares the same bus as other sensors, requiring only two GPIO pins. The 2.7 V to 5.5 V supply accommodates single-cell Li-ion or Li-polymer batteries directly. Industrial temperature rating ensures reliable operation against skin-temperature variations during exercise.
Recommended
IoT Smart-Home Status Displays
The IS31FL3196A serves as a compact status-indicator driver for IoT smart-home hubs, sensors, and Wi-Fi repeaters, where its I2C interface integrates with the host MCU over the same bus used for sensor reads. The six channels can separately indicate power, network status, sensor activity, alarm, and two user-programmable events without additional GPIO expanders. Built-in automatic and semi-automatic breathing patterns reduce firmware overhead for slow pulsing indicators. Audio AGC mode enables doorbell or alarm audio-visual feedback from a single chip. The exposed-pad QFN-20 package supports operation in enclosed plastic housings without external heatsinking.
Recommended
Gaming Keyboard RGB Backlighting
For gaming keyboards and mice, the IS31FL3196A drives per-key or per-zone RGB LEDs with 256-step PWM for smooth color transitions and animation effects. The 40 mA per-channel drive supports high-brightness LEDs visible under daylight or strong ambient light. Cascade mode synchronizes multiple IS31FL3196A devices across keyboard regions for unified wave and ripple animations. The 8-level programmable current enables per-LED calibration to compensate for brightness variation across the keyboard. Audio AGC mode supports game-audio-driven reactive lighting that responds to explosions, gunshots, or music without host MCU intervention.
Recommended
AR/VR Accessory Indicators
In AR/VR controller accessories, the IS31FL3196A drives battery-status, tracking-status, and haptic-feedback indicator LEDs in a 3 mm x 3 mm footprint that fits inside slim controller grips. The 2.7 V to 5.5 V supply matches single-cell Li-ion batteries used in wireless controllers. The I2C interface pairs with the controller's BLE SoC over a shared bus, eliminating extra GPIOs. Built-in breathing patterns provide low-power standby indicators that consume minimal MCU cycles. Cascade mode synchronizes multiple drivers across left and right controllers for matched feedback patterns, and the industrial temperature range supports operation across diverse gaming environments.
Recommended
Recommended Products Summary
Engineering reference data for IS31FL3196A-QFLS2-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IS31FL3196A-QFLS2 | IS31FL3196C-QFLS2-TR | IS31FL3235A-QFLS2-TR | IS31FL3196-QFLS2-TR | IS31FL3194-QFLS2-TR |
|---|---|---|---|---|---|---|
| Package | 20-pin QFN (3x3) | 20-pin QFN (3x3) - same | 20-pin QFN (3x3) - same | 20-pin QFN (3x3) - same | 20-pin QFN (3x3) - same | 20-pin QFN (3x3) - same |
| Brand | Lumissil Microsystems | Lumissil Microsystems | Lumissil Microsystems | Lumissil Microsystems | Lumissil Microsystems | Lumissil Microsystems |
| Number of Channels | 6 | 6 | 6 | 12 | 6 | 4 |
| Audio AGC Mode | Yes | Yes | Yes | No | Yes | No |
| Built-in Breathing Patterns | Yes | Yes | Yes | No | Yes | Yes |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Interface | I2C | I2C | I2C | I2C | I2C | I2C |
Key Differentiators
- Integrated audio AGC mode (vs IS31FL3235A-QFLS2-TR)
- Built-in breathing pattern generator (vs IS31FL3194-QFLS2-TR)
- Compact 3 mm x 3 mm QFN with full 6-channel drive (vs IS31FL3196-QFLS2-TR (pre-A revision))
Design Notes
Estimated: At maximum settings (6 channels x 40 mA x 1.0 V dropout across each sink), the IS31FL3196A dissipates approximately 0.24 W internally. The QFN-20 package with a properly soldered exposed thermal pad and 25 mm^2 of copper pour keeps the junction temperature rise well below 30 C above ambient. Without the exposed pad soldered, the same dissipation could push the junction above 100 C rise, risking thermal shutdown. Always solder the thermal pad with multiple thermal vias to the inner ground plane for reliable full-current operation.
Place the VCC decoupling capacitor (1 uF ceramic minimum, X7R recommended) within 2 mm of the VCC pin to suppress switching transients from the I2C bus. Keep SDA and SCL traces short and routed away from switching nodes or LED anode traces that carry pulsed currents. The exposed thermal pad must be soldered to a continuous copper pour with at least 4 thermal vias to the inner ground plane for adequate heat spreading. Avoid routing signal traces beneath the package to prevent coupling into the audio AGC input.
Ensure VLED (LED anode supply) is at least 0.5 V higher than the sum of LED forward voltage plus the current-sink dropout. Insufficient VLED causes current regulation to fail and channels to appear dim or mismatched. The SDB pin must be pulled high for normal operation; leaving it floating will hold the chip in reset. When cascading multiple IS31FL3196A devices, set the A0 pin on each device to assign a unique I2C address before power-up. Finally, do not exceed 5.5 V on VCC, or the internal ESD clamps may activate and waste power.
Compliance Information
RoHS compliance confirmed via DigiKey product listing. REACH compliance assumed by Lumissil standard policy but not explicitly stated in retrieved data. AEC-Q100 not applicable - this is a consumer-grade LED driver. Halogen-free and conflict-mineral status not retrieved - set to unknown pending manufacturer disclosure.
