ISSI launches next generation family of matrix FxLED driver ICs

Integrated Silicon Solution, Inc., a leader in advanced memory and analog IC solutions, today announced a family of high performance LED drivers, IS31FL3741 & IS31FL3742 to support LED matrices consisting of 351 & 180 LEDs respectively. With the introduction of these two devices, ISSI expands its FxLED driver family to offer the widest selection of matrix LED driver solutions for gaming, consumer and white goods applications. ISSI's LED matrix architecture provides designers with flexibility in controlling individual LEDs or an array of LEDs resulting in simplified color & dimming adjustment and lighting zone selection for a large array of LEDs.

The IS31FL374x family of matrix LED drivers integrates many advanced features such as a configurable matrix (row/column) architecture, global dimming, individual LED peak current control registers, individual LED PWM control registers, individual LED open/short fault detection; all accessible via a fast 1MHz I2C compatible bus interface. Each LED has its own corresponding control and fault status register to provide individual LED color and dimming effects, de-ghosting and fault reporting for enhanced overall system performance and reliability. LED matrix architectures typically experience a "ghosting effect" where an LED remains dimly ON due to a residual charge in the LED array matrix. The IS31FL374x family eliminates this residual charge and therefore the ghosting effect. In addition LEDs can fail to turn ON due to an LED open or short condition without the knowledge of the system. The IS31FL374x family detects the failed LED condition, stores this in the open or short registers and generates an interrupt to notify the failure LED within the array.

Compared to the traditional LED dimming control, the IS31FL374x family features individual LED peak current adjust called "Dot Correction" to adjust the brightness of the LED in 256 steps. This feature allows the user to adjust the color of LED to get the pure white color and keep 1.6 million levels of PWM dimming. It also allows the user to set different maximum current levels for different zones to get a better brightness balance.