Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - LED Drivers

The LM3553SDX/NOPB is a Power Management Integrated Circuit (PMIC) specifically used to drive LEDs with very high efficiency levels. It is an economical, easy to use, high performance solution that is suitable for a wide range of applications including automotive, medical, industrial sensing and lighting.

Field Applications

The LM3553SDX/NOPB can be used for multiple applications including automotive and outdoor lighting, medical lighting, industrial sensing, and multi-lighting.

• Automotive and Outdoor Lighting: The speed and low power consumption of the LM3553SDX/NOPB make it the ideal choice for automotive lighting. Its use of white LEDs in combination with signal control makes it great for distance, sign and road illumination while ensuring long lasting, low power consumption lighting.
• Medical Lighting: The versatile features of the LM3553SDX/NOPB allows it to be used for a number of medical lighting applications. Its low current consumption mode, capacitor discharge mode, and pulse-width modulation (PWM) makes it suitable for micro-LED and LED backlights.
• Industrial Sensing: The LM3553SDX/NOPB is also perfect for providing lighting for industrial sensing systems. Its low current consumption and fast turn-on allow for a range of sensing capabilities including obstacle detection, stroke detection, and position detection.
• Multi-lighting: The LM3553SDX/NOPB is ideal for multi-lighting applications such as LED controller, LED stage lighting, LED emergency lighting, LED task lighting and LED mood lighting. Its dynamic current regulation offers a range of smooth brightness and color combinations.

Working Principle

The LM3553SDX/NOPB is a monolithic PMIC with an integrated circuit driving up to 16 LEDs in parallel or up to 8 LEDs in series. The LM3553SDX/NOPB includes 5 power management components such as low-voltage (VSSOP-20) oscillator, dual-level voltage switch, MOSFET driver, high-speed current mirrors and voltage- controlled current source. Additionally, the LM3553SDX/NOPB includes features such as soft-start, current-limit and thermal disconnect to improve system reliability.

The operating principle of the LM3553SDX/NOPB is based on current-regulated power management. The regulated output current is regulated by a level-shifter voltage switch which is controlled by the oscillator. The current flows from the voltage source, through the level-shifter and then to the current mirrors which drive the LEDs. The current limit setting can be increased and decreased by adjusting the oscillator frequency. Additionally, the voltage-controlled current source is used to ensure a constant LED current over temperature and voltage variation.

The LM3553SDX/NOPB is a very efficient and reliable LED driver solution. Its power management features keep power consumption low, making it a great power management solution for a range of applications. Its range of features also makes it easy to use, which simplifies the design process for engineers.

The specific data is subject to PDF, and the above content is for reference