IS31FL3199-QFLS2-TR

IS31FL3199-QFLS2-TR is an 8-channel, constant-current LED driver with I2C control (from ISSI). It sinks eight LEDs with independently programmable currents, ideal for LCD backlighting, display lighting, and indicator strips without taxing the microcontroller. Features typically include global dimming (PWM), per-channel dimming registers, open/short LED detection and fault reporting, and protection/thermals. It operates from a wide supply (about 2.7–5.5 V) with low quiescent current. The QFLS2-TR suffix denotes a QFN package variant in Tape & Reel packaging for automated assembly. Applications include backlights, keyboards, wearables, and small displays where compact, multi-channel, programmable LED driving is needed. Connections: connect LED cathodes to OUTx pins, anodes to VCC as per design; use SDA/SCL for register programming, plus VCC and GND.

IS31FL3199-QFLS2-TR features:
- 18-channel constant-current LED driver with I2C-compatible control
- Individual channel current setting via registers for uniform brightness
- Global and per-channel dimming using PWM with high resolution
- Protection: open-load, short-circuit, and thermal shutdown with automatic recovery
- Fault reporting/interrupt capability
- I2C interface with standard addressing and register auto-increment for multi-device topologies
- Low quiescent current and broad operating voltage range
- Small package (QFLS2) with Tape & Reel (-TR) for automated assembly
Typical applications: LED displays/matrices, backlighting, decorative/signage.

- Pin count: 28 pins (QFN/28 package)
- Function: I2C-controlled, multi-channel constant-current LED driver (16-channel sink outputs) for LED matrices/backlight with PWM dimming. The -TR suffix indicates Tape & Reel packaging.

- Manufacturer: Integrated Silicon Solution, Inc. (ISSI).
- What kind of company: A US-based fabless semiconductor company that designs and markets memory and mixed-signal ICs (including LED driver ICs).

Application areas: multi-channel constant-current LED driver for displays and backlighting; LED matrix and dot-matrix panels; signage and indicator lighting (indoor/outdoor); automotive instrument clusters and interior lighting; consumer electronics (keyboard/backlight, remote, wearables); IoT/smart devices needing compact LED drive with I2C control.

Package type: QFN leadless package (QFLS2 variant), supplied in Tape & Reel (TR).