AW9523B is a 16 multi-function LED driver and GPIO controller. Any of the 16 I/O ports can be configured as LED drive mode or GPIO mode. Furthermore, any GPIO can be configured as an input or an output independently. After power on, all the 16 I/O ports are configured as GPIO output as default, which default states are set according to the I 2 C device address selection inputs, AD0 and AD1. All I/O ports configured as inputs are continuously monitored for state changes. State changes are indicated by the INTN output. When AW9523B reads GPIO state through the I 2 C interface, the interrupt is cleared. Interrupt has 8μs deglitch. When the I/O ports are configured as LED drive mode, AW9523B can set the current of LED drive between 0~IMAX by I 2 C interface, which is divided by 256 steps linear dimming. The default maximum current (IMAX) is 37mA, and IMAX can be changed in GCR register.


l  16 multi-function I/O, each for LED drive (current-source dimming) or GPIO mode

l  256 steps linear dimming in LED drive mode

l  Any GPIO can be configured as an input or an output independently

l  Support interrupt, 8μs deglitch, low-level active

l  Standard I2C interface, AD1/AD0 select I2C device address

l  SDA, SCL, RSTN, and all GPIO can accept in 1.8V logic input

l  Supply shutdown function, low-level active

l  2.5V~5.5V power supply

lQFN 4mmX4mm-24L package


Application note

Title Type Size Date Download
DS_AW9523B_EN_Multi-Function LED Driver And GPIO Controller With IIC Interface_V1.5.pdf PDF 1.4MB 2019-07-31
  • LED Channel
    Charging Indicator
    Auto Breath
    Global Max Current(mA)
    Global Current Level
    Individual Current Level
    PWM Level
    Power Supply (V)
Package form Number of pins Long(mm) Width(mm) Thick(mm) Pin spacing(mm) Heat sink Package drawing
QFN 4.0×4.0×0.75 -24L(2.70) 24 4.0 4.0 0.75 0.5 Y
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