The L99LDLH32 linear current stabilizer of STMicroelectronics provides a simple integrated solution for controlling dynamic vehicle lighting using lightweight CAN FD Light protocol. The OLED lamp can emit bright, uniform and high contrast light from a small surface. The new driver is perfectly matched with the OLED, allowing designers to create complex patterns and light effects, and enhancing the safety and visual effect of the car's appearance design
L99LDLH32 has 32 stable current power supplies that can be independently programmed within the range of 1mA to 15mA, which can drive each pixel of the interior and exterior lamps independently, and also provides the overall dimming function with 8-bit resolution. When the vehicle battery voltage is used for power supply, the maximum output voltage of the driver is 35 V, covering a wide range of emitter forward voltage.
The on-chip integrated CAN FD Light protocol processor and transceiver simplify the connection between the current stabilizer chip and the vehicle communication infrastructure and the control domain electronic control unit ECU. The controller/transponder synchronous communication of CAN FD Light is based on mature industry standards and is used to control simple devices such as lamps and sensors, which can save expensive external components, such as timing crystals. On the other hand, the 1Mbit/s data bandwidth allows designers to create complex animation patterns to achieve smooth modulation of light and dark transitions and dimming effects.
In addition, the on-chip storage unit allows to set the current intensity and PWM dimming parameters for independent operation, providing failure protection for the system in case of functional failure of the communication bus or controller. The target applications of L99LDLH32 include tail lights, brake lights, turn signals and other safety critical lighting, which provide the functions required to achieve high functional safety, including fault status pins, voltage monitors, temperature monitors, programmable timeout watchdog, and short circuit and open circuit load detection. In addition, frequency jitter technology can minimize electromagnetic radiation.
L99LDLH32 adopts BCD9sL process of STC, which is a monolithic integrated solution and conforms to AEC-Q100 vehicle specification standard. Users can order at the ST eStore online mall. 7mm x 7mm QFN48 is adopted for package, with wettable side and exposed heat dissipation pad for auxiliary heat dissipation
