STMicroelectronics LED1202 12-channel LED driver

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With features to prevent distracting artefacts in ‘colour chasing’ or ‘deep breathing’ LED animation effects, the STMicroelectronics LED1202 12-channel LED driver enables smooth and more natural interactions with smart home devices, wearable electronics and small appliances.

The driver 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 analog dimming via the driver’s I²C interface. Minimal external components are required to complete the driver circuit.

With 12 output channels, a single device can drive four RGB LEDs at up to 20 mA per channel. An innovative synchronisation feature allows connecting up to eight drivers to control larger LED arrays. In addition, low-current channel matching, within 2% (typical) at 2.5 mA, 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.

For more information: www.st.com/led1202-pr.