16-channel I²C LED driver for backlight and indicator arrays
The PCA9532PW,112 from NXP Semiconductors is an I²C-bus controlled LED driver with 16 open-drain outputs, each rated for 25 mA continuous current. The Power Switch type means each output acts as a constant-current sink, controlled via the I²C interface for individual on/off and PWM dimming — ideal for backlighting keypads, LCD panels, or status indicator arrays in embedded systems.
The surface-mount package keeps the component height low for tight enclosures. The internal switches (open-drain NMOS) eliminate the need for external driver transistors for most LED loads up to 25 mA per channel — the I²C bus handles the dimming protocol directly, reducing BOM count.
Active production and compliance
No pin-compatible second-source or successor is listed — the NXP PCA9532 family is the primary reference.
