IS31FL3195 CHARGE PUMP RGBW LED DRIVER WITH PROGRAMMABLE SELF-RUNNING PATTERNS May 2019 GENERAL DESCRIPTION FEATURES The IS31FL3195 is a compact and efficient 4-channel 2.7V to 5.5V supply voltage charge pump LED driver with programmable sequence Charge pump operation for automated RGBW lighting effects. It is - 1x, 1.5x operating modes capable of driving 1 to 4 LEDs with a low drop-out and - Highly efficient across battery state of charge current matching so all 4 LEDs maintain consistent - 1MHz constant frequency brightness. Each channel can support up to 20mA of - Enter 1.5x mode if any of the four OUTx pins < current. 150mV (50mV~300mV selectable) The builtin charge pump (CP) structure will Power saving operating automatically toggle between 1x, 1.5x operation - 1A Shutdown current depending on the batterys state of charge. This - 640A Quiescent operating current (CP1x DC/DC converter operates at a high switching mode)-Two selectable sleep modes frequency which enables the use of small external - Sleep 1 Mode: 38A capacitors and achieves 92% peak total efficiency. The IS31FL3195 is optimized for battery applications. To - Sleep 2 Mode: 1A conserve battery life, the charge pump goes into high - Auto sleep mode if all OUTx outputs are off for impedance mode whenever the IS31FL3195 is >30s. shutdown consuming less than 1A. Support four LEDs - RGBW The IS31FL3195 can operate in either Current Level - Resistor sets LED current up to 20mA or Programmable Sequence mode. In Current Level - 8-bit dot correction mode, the average output current of each output is LEDs can operate with pre-established lighting independently programmed and controlled in 256 patterns PWM steps to simplify color mixing. In programmable - Run without a micro sequence mode, the timing characteristics for each - Fixed number of iterations or non-stop operation output can be individually adjusted to maintain a - Each channel has its own fade registers (TS-T4) pre-established pattern sequence without requiring with independent start/stop any additional MCU interaction, thus saving valuable 1MHz I2C bus interface system resources. - Automatic address increment function The IS31FL3195 is available in a small QFN-16 (4mm - 4 selectable I2C address locations 4mm) and WLCSP-16 (1.88mm2.08mm, 0.45mm ball pitch, 0.2mm ball diameter) packages. It operates Over-temperature protection from 2.7V to 5.5V over the temperature range of -40C QFN-16 (4mm4mm) and WLCSP-16 to +85C. (1.88mm2.08mm, 0.45mm ball pitch, 0.2mm ball With automated lighting effects and a DC/DC charge diameter) packages pump, the small package IS31FL3195 is ideal for low Operating temperature range is -40C ~ +85C power battery applications. APPLICATIONS Internet-of-Things (IOT) Low-power battery applications Wearable applications Hand-held devices requiring visual notifications Lumissil Microsystems www.lumissil.com 1 Rev. A, 04/18/2019 IS31FL3195 TYPICAL APPLICATION CIRCUIT 3.3V~5.5V VCC C1P 1 F 1 F 0.1 F C1N C2P 1 F 3.3V C2N 4.7k 4.7k 3.3V VOUT SDA 1 F Micro IS31FL3195 SCL Controller SDB OUT1 100k OUT2 ISET OUT3 RISET IGMAX=20mA AD 12k GND OUT4 Figure 1 Typical Application Circuit Lumissil Microsystems www.lumissil.com 2 Rev. A, 04/18/2019