Intersil Announces New Series of 6-Channel LED Drivers to Extend Battery Life in Portable Devices
ISL97671, ISL97672, ISL97673 and ISL97674 are new family of innovative multi-channel LED drivers from Intersil that provides an ultra-low dimming capability that can significantly extend battery life in notebook, netbook and tablet computers.
The new series of 6-channel LED Drivers reduces undesirable backlight-induced visual artifacts such as flickering, shimmering and banding that are observed when using conventional LED drivers. The drivers minimize power loss by using a proprietary dynamic headroom control circuit to detect the highest voltage LED string, and then regulate the boost output to the minimum required voltage. The devices drive up to six 40mA strings of LEDs from a 4.5V to 26V input. A highly accurate LED current matching circuit achieves an industry-best ±0.7% current matching between LED strings. The ISL97671/2/3/4 series also includes an integrated boost converter to step-up the input voltage to support LED stack voltages up to 45V.
The new series of 6-channel LED Drivers responds to very low PWM duty cycles and provides dimming down to just 0.007% of full brightness with a 200Hz PWM frequency. Dimming may be controlled by direct PWM dimming or by using 8-bit digital dimming via an I2C/SMBus interface.
The ISL97671/2/3/4 series is available in a compact 20-lead 4mm x 3mm QFN package. Price begins at $1.80 each in 1,000-piece quantities
The new series of 6-channel LED Drivers
(Photo from Intersil Website)
More information about 6-channel LED Drivers can be found at Intersil website