Lumissil IS31FL376X family

The IS31FL376x devices are high-performance LED matrix drivers with selectable I2C/SPI bus and integrate 33 constant current sinks while the IS31FL3763 and IS31FL3766 integrate 18 current sinks. All have a selectable number of switching MOSFETs and integrate an enhanced deghosting circuit to mitigate or eliminate ghosting effects in LED displays. The IS31FL376x matrix drivers support both analog and PWM dimming methods. For analog dimming, each LED can be individually adjusted, or the entire matrix can be globally adjusted with 256 current levels. The drivers also have 8 or 12-bit configurable PWM generators to enable smooth digital dimming. 

Key features

• Configurable Matrix Size:33×n(n=1~12,IS31FL3761);18×n(n=1~12,IS31FL3763; n=1~6,IS31FL3766)
• Integrated noise reduction circuitry: Spread spectrum, current sink grouping
• Selectable I2C(1MHz) or SPI(12MHz) bus interface
• Advanced matrix scanning to eliminate display artifacts

Additional features

• 2.7V to 5.5V (IS31FL3761), 3.0V to 5.5V (IS31FL3763/6)
• Support matrix configuration
• Individual 12-bit/8+4-bit/8-bit /6+2-bit PWM control steps
• 26kHz frame rate (6+2bit PWM mode:IS31FL37631), 24kHz frame rate (@6+2-bit PWM:IS31FL3763), 288kHz PWM Frequency (@6+2-bit PWM:IS31FL3766)
• Constant-current output range: 30mA(IS31FL3761),40mA (IS31FL3763/6)
• Ultra-low I_CC (1.2mA Typ.) when frame rate is 333Hz (IS31FL37631); Ultra-low I_CC when frame rate is about 375Hz (280µA, 6+2-bit mode, I_OUT(PEAK)=2.9mA) IS31FL3763; Ultra-low I_CC when PWM frequency is 4.5kHz (280µA, 6+2-bit mode, I_OUT(PEAK)=2.9mA)
• Each current sink (CSy) 8-bit DC current steps
• Global 256 steps current setting
• 1MHz I2C or 12MHz SPI (IS31FL3761/3); 1MHz I2C-compatible interface(IS31FL3766)
• State lookup registers (IS31FL3763/6)
• Random switching sequencing to mitigate power ripple, EMI, and audible noise (IS31FL3763/6)
• For matrix scanning operation
  • Built-in de ghosting circuit
  • Reduced inactive LED reverse bias to improve LED reliability
     
• LED open/short detection accessible to I2C(IS31FL3761/63/66), SPI(IS31FL3761/63)
• Group phase shift (180 degree) to reduce audible noise and power ripple
• Spread spectrum
• ±6% device to device @I_OUT=30mA, ±5% bit to bit @I_OUT=30mA (IS31FL3761)
• Software shutdown mode
• Operating temperature: -40°C to 125°C
• QFN-60 (7mm×7mm) package (IS31FL3761); QFN-40 (5mm×5mm) package (IS31FL3763); QFN-32 (4mm×4mm) package (IS31FL3766)
• RoHS & Halogen-Free Compliance
• TSCA Compliance

Applications

• Factory automation
• Smart grid
• Smart home
• Personal care
• LED display for hand-held devices
• Test environment