Ideal for applications including general lighting, residential and commercial lighting, architectural lighting, and mood lighting, the MSL2021,MSL2023,MSL2024 two-channel solid state lighting (SSL) LED drivers provide accurate color control for two-color LED light engines. The MSL2021 is the first LED driver with integrated temperature compensation for the color LED string, the MSL2023 offers I2C serial port and internal pulse-width modulation (PWM) generators, and the MSL2024 features individual PWM input pins.
They drive one dominant LED string with a linear controller and one color LED string with a low-side buck controller to achieve the target correlated color temperature (CCT) coordinate, and replicate the color spectrum to attain a high CRI value.
The devices have a look-up table in the EEPROM so designers can program accurate profiles to follow the desired CCT compensation curve, lowering the overall bill of materials (BOM) cost. The linear controller for white LEDs in the device family adaptively controls the headroom of any ac/dc or dc/dc, isolated or non-isolated topology, while external MOSFETs give designers the flexibility of choosing LED currents and LED string lengths.
In addition there are several dimming options and I2C interface for additional flexibility and control. all can be accompanied with an Atmel AVR microcontroller (MCU) or ARM processor-based MCU for a complete system solution in a variety of luminaires and lamp configurations. (ea/1,000; MSL2021, from $3.10; MSL2023, from $2.74, MSL2024, $2.52 – available now)
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