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PMIC - LED Drivers: ASL2416SHN/LY

The ASL2416SHN/LY series are a family of 6-channel, ultra-precise, ultra-high-efficiency, linear switching regulators designed for easy replacement of linear power supplies for powering small and medium-sized RGB LEDs. They support a wide input voltage range of 4.5 V - 24 V and output currents up to 250mA in Constant Current mode. This allows customers to design multiple LED modules that are easy to supply and control.

The ASL2416SHN/LY series can be used to drive the three primary colors of LEDs, each color having two channels. All channels on the series are internally connected in Parallel, giving higher total current capacity and better reliability compared to a regular IR LED driver. LED brightness control is also implemented in the regulator, which allows for each channel to be adjusted independently of each other.

The typical applications for the ASL2416SHN/LY series include backlighting for LCDs and keypads, touch button indicators,and accent lighting for consumer and industrial products. The operating principle of a linear regulator is to regulate the output voltage by adjusting the supply current, allowing it to provide an even and stable regulation of current (and thus brightness) in the LEDs being driven. The tight regulation of the ASL2416SHN/LY ensures that all LEDs remain active, even if the input voltage varies, and under extreme conditions, the regulators will protect against overload, overcurrent and surge protection.

The ASL2416SHN/LY series also offers many advantages, such as wide efficiency range, low quiescent current, adjustable switching frequency and low EMI. They have been designed to optimize power dissipation, resulting in a high power-conversion efficiency, which reduces total system power consumption. Additionally, the internal ready-to-use thermal protection protects the system from thermal-related events.

The ASL2416SHN/LY series has a built-in UVLO (Under Voltage Lock Out) function, which is designed to prevent startup condition failure which may occur due to low input voltage supply. If a valid voltage is detected across the power supply input, the regulator will start the oscillator, allowing normal operation.

In conclusion, the ASL2416SHN/LY series is an excellent choice for applications that require a reliable, efficient and precise LED light source, offering a cost-effective solution and supporting a wide input voltage range.

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