IS31FL3197
DESCRIPTION
The IS31FL3197 is a charge pump LED driver with programmable sequence operation for automated RGBW lighting effects. It is capable of driving 4 LEDs up to 10m A (adjustable in 256 current levels and 4096 PWM levels) from a small coin size battery supply.
The built- in charge pump structure will automatically toggle between 1x, 1.5x or 2x operation depending on the battery’s state of charge. This DC/DC converter operates at a high switching frequency which enables the use of small external capacitors and achieves a 90% peak efficiency. To conserve battery life, the charge pump goes into high impedance mode whenever the IS31FL3197 is shutdown.
The IS31FL3197 can operate in either “Current Level & PWM mode” or “Pattern” mode. In Current Level & PWM mode, the output current of each output is independently programmed and controlled in 4096 steps to achieve color mixing and the PWM duty cycle of each output is also independently programmed and controlled in 4096 steps to simplify...
