ST Microelectronics has launched LED1202, a 12-Channel LED Driver. The driver comes with patented features such as smoother and more natural interactions with smart-home devices, wearable electronics, and small appliances in order to prevent distracting artifacts in “colour-chasing” or “deep breathing” LED animation.
The LED1202 can store eight programmable patterns and sequences and operate independently of the main controller, enabling the host system to save power while sophisticated lighting effects run continuously. 12-bit internal PWM dimming enables precision control of programmed sequences and the main controller can set 8-bit values for analogue dimming via the driver’s I2C interface. Minimal external components are required to complete the driver circuit.
With 12 output channels, a single LED1202 can drive four RGB LEDs at up to 20mA per channel. An innovative synchronisation feature allows connecting up to eight LED1202 drivers to control larger LED arrays. In addition, superior low-current channel matching, within 2% (typical) at 2.5mA, enhances colour consistency. Phase shifting between channels minimises current ripple and prevents excessive peak demand. Built-in safety features include open-LED detection, over-temperature protection, and a fault-flag pin.
