MSL4164BT-R

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The MSL4164BT-R is a single-channel linear constant current LED driver, providing a straightforward way of achieving a constant LED current with excellent regulation, even at very low output currents. This PMIC is specifically designed to drive LEDs and other similar types of loads in a number of different applications. MSL4164BT-R has a wide input voltage range and a low output capacitance which make it suitable for LED lighting applications that require a wide input voltage range and fast response.

The main purpose of the MSL4164BT-R is to drive LEDs, such as backlight LEDs in LCD displays, indicators, and decorative lighting. It supports various types of LEDs, including those with a wide forward voltage range and with up to 50V high voltage input. Thanks to its internal linear current regulator and current source, it provides a perfectly stable output current for high-brightness LEDs, even at very low output currents. The chip eliminates the need for optocouplers, voltage regulators, and other components needed for linear LED control.

MSL4164BT-R features an adjustable 0.1%\~2.5% accurate current regulation, very low current ripple, low output capacitance and high efficiency. Its wide input voltage range, low standby current and programmable current range make it the perfect solution for LED driving. Due to its low output capacitance, the device can provide a very fast response with a good dynamic range.

The working principle of MSL4164BT-R is straightforward: The current through the LED is regulated by the internal linear regulator. The LED current is set by an external current sense resistor. When the output voltage of the LED is less than the reference voltage, the transistor is off and the LED current is reduced. When the output voltage of the LED is more than the reference voltage, the transistor switches on and the LED current is increased. This process is repeated continuously to ensure that the LED current remains constant and at the desired level.

In summary, the MSL4164BT-R provides an ideal solution for linear control of LEDs, supporting a wide range of input voltages and current levels. Its adjustable current regulation and low output capacitance allow for fast dynamic response and controlled brightness. The chip eliminates the need for external components and is thus a suitable and cost-effective choice for LED lighting applications.

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