Product Details
●The ADP5520 is a versatile single-chip, white LED backlight driver with a user configurable I/O expander. This device fits handset applications where the flip or slider section of the phone requires backlighting, I/O signaling and detecting, auxiliary LED lighting, and keypad functions. By incorporating an I2C-compatible serial interface and a single line interrupt, the ADP5520 significantly reduces the total number of lines required to interface with the baseband processor across the hinge flex.
●The ADP5520 can detect ambient light levels and adjust the backlight brightness accordingly, resulting in extended battery operation.
●Once configured, the ADP5520 is capable of controlling the flip/slider backlight intensity, on/off timing, dimming, and fading without the intervention of the main processor, which results in valuable battery power saving.
●Applications
● Display backlight driver for phones that require slider or flip keypad functions with single or multiple LED indicators
●### Features and Benefits
● Efficient asynchronous boost converter for driving up to 6 white LEDs
● 2.7 V to 5.5 V input voltage range
● 128 programmable backlight LED current levels (30 mA maximum)
● Ambient light sensing with autonomous backlight adjustment
● Programmable backlight fade-in/fade-out times
● Programmable backlight dim and off times
● 8 configurable GPIO pins (input, output, up to 4 × 4 keypad)
● Up to 3 auxiliary LED current sinks (1 dedicated, 2 configurable)
● 64 programmable auxiliary LED current levels (14 mA maximum)
● Programmable auxiliary LED fade-in/fade-out times
● Programmable auxiliary LED on and off times (allows blinking)
● I2C-compatible serial interface
● Interrupt line for signaling an external processor (INT)
● Hard reset (RST)
● Current limit protection
● Thermal overload protection
● Available in small 4.0 mm × 4.0 mm, 24-lead LFCSP package
