Active lifecycle — BOM-fit for new designs
The PCA9531D,118: ROHS3 compliant — no exemption-based restrictions on the BOM for global markets requiring full RoHS conformance.
8-channel I²C-bus LED driver — 25 mA per channel
This is an I²C-bus 8-bit LED driver with linear constant-current outputs. Each of the eight channels sinks up to 25 mA, set by an external resistor — the total output current is programmable via the I²C interface, allowing per-channel PWM dimming without additional processor overhead. Internal switches are integrated — no external driver FETs needed for the LED current path; the part handles the switching internally.
Suitable for outdoor-rated backlight units, automotive cabin lighting (non-engine bay), and industrial control panels where ambient stays within this band.
16-SOIC surface-mount package
Surface-mount assembly — standard SOIC footprint with 1.27 mm pitch, compatible with reflow soldering. CT works for prototyping or small-batch runs.
Target application: backlight dimming
The PCA9531D,118 is specifically listed for backlight applications — common in LCD panel backlighting, keypad illumination, and indicator arrays where I²C-controlled dimming simplifies the host firmware. Each channel's PWM duty cycle is set via the I²C bus, so a single microcontroller I²C port can manage eight independent LED strings without dedicated PWM timer pins.