NCP5890: Light Management IC (LMIC) for LCD Backlight and Multi-LED Keypad Backlight/ Fun lighting Applications

Datasheet: NCP5890/D Rev. 1 (373.0kB)

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NCP5890 drives LEDs for LCD backlighting & multiple LEDs for keypad backlight or funlight. Unique structure that allows all LEDs to be connected in series, while offering 3 independent PWM controls on LED sets. Inductive step-down converter structure offers high efficiency up to 90%. Integrated ambient light sensing adjusts backlight brightness to optimize power consumption and user comfort. Built-in gradual dimming can be called up upon a simple I2C command, thus will not require any external processor resources or software programming. The device is available in the ultra thin QFN-16 package with a 0.5 mm profile.

特長		利点
2.7 to 5.5V Input voltage range		Operates over the full standard Li-Ion battery voltage.
90% Peak efficiency with 4.7H/ 150m inductor		Save energy, extends battery operating time.
Built-in Gradual Dimming (Fade-in/ -out effect)		Elimnate need of software programing and processor resources
Ambient light sensor adjusts backlight current		Elimnate need of software programing and processor resources
3 independent PWM control LED segments		Provides RGB or White LEDs Fun Light control
Support the I2C Protocol with address extension		The extended address is usefull to avoid I2C conflict when several chips share the same bus.
Tight 1% I-LED tolerance		The tight tolerance yields an accurate rendering color of the associated LED
Ultra Thin 0.5mm QFN16 package		The package is small enough to fit into any thin application
True cut-off elminate leakage current in shutdown mode		Extend battery standby time
34 V / 25 mA output capability through the whole string of LEDs		Can drive high number of LEDs with good efficiency

アプリケーション
LCD and Keypad Backlighting Fun light with RGB or White LED

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