White-LED charge pumps are industry’s smallest
Parts integrate camera support, reducing total solution size by 40%
Integrating backlight drivers, camera-flash drivers, and camera power supplies, the MAX8654X/MAX8645Y white-LED drivers are offered as the industry’s smallest of their kindreducing total required area by 40%. These devices drive both six white LEDs at up to 30 mA/LED, with 5-bit dimming resolution and 0.2% typ current matching, as well as two flash LEDs, at up to 200 mA/LED with 5-bit resolution.
Features include two programmable 200-mA LDOs with a noise figure of 40 µVrms typ, adaptive 1X/1.5X/2X charge pump mode, and an efficiency of 85%. Dimming control can be accomplished using either a simple 2-bit logic interface or, for finer resolution, the logic pins can be connected together and used as a serial-pulse interface.
Other features include soft-start to reduce in-rush current and a proprietary thermal-derating function, which protects the LEDs by scaling back the drive current at high operating temperatures. The MAX8645X/MAX8645Y provide 1-MHz fixed-frequency switching and are available in TDFN packages. (From $2.81 ea/1,000—available now.)
Maxim Integrated Products , Sunnyvale , CA
Customer Service 800-998-8800
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