BT6231x  Triple 150mA Linear LED Driver

BT6231A/1B/1C/1D family devices provide independent triple linear current controller for LED driving (standalone driver or LED cluster). Diagnostic features are provided to meet automotive requirements, together with a communication interface “RUN” to link ICs to generate more than three channels, supporting individual current configuration and independent digital PWM dimming per channel (e.g. for RGB).

Two external configurable operation modes are supported. In the Failure Feedback Mode (FFM), channels are still operating in case of errors with error signalization. And in Single Lamp Mode, all linked BT6231´s channels will be turned off in case of errors.

An intelligent power management system is provided using an external shunt resistor to share power distribution between IC package and external heat sink. Hotspot generation can be avoided by flexible heat spreading on the printed board. Internal derating for reference voltage and over temperature shutdown for extreme temperatures higher than 180°C to protect BT6231 in case of abnormal operation conditions.

A high voltage capable input ENA can be used to either digitally enable or disable BT6231. In addition, this input may be used as analog reference voltage input for thermal derating.