AL58263 Grayscale PWM Dimming LED Driver Diodes Incorporated AL58263 Grayscale PWM Dimming LED Driver offers a 16-channel, constant-current, grayscale Adaptive Pulse Density Modulation (APDM). The APDM technology abates the non-ideal IOUT distortion due to non-symmetric transient responses and enhances the refresh rate by efficiently separating the frame waveform. The AL58263 supports error diagnostics, current gain control, and power-saving functionality.