Texas Instruments

LM27951SD

LM27951SD Description

The LM27951SD is a high-performance, switched-capacitor LED driver from Texas Instruments, designed for backlight applications. This IC is part of the External/Internal LED Drivers category and is not recommended for new designs. It features an internal switch, four output channels, and supports PWM dimming. The LM27951SD operates with a supply voltage range of 2.8V to 5.5V and provides an output voltage of 2.5V to 3.9V. It has a frequency of 750kHz and can deliver up to 30mA per channel.

LM27951SD Features

• Internal Switch: The LM27951SD features an internal switch, simplifying the design and reducing component count.
• Four Output Channels: With four output channels, the LM27951SD can drive multiple LEDs simultaneously, providing flexibility in LED backlighting applications.
• PWM Dimming: The LM27951SD supports PWM dimming, allowing for precise control of LED brightness and enabling energy-efficient operation.
• Wide Supply Voltage Range: The device operates with a supply voltage range of 2.8V to 5.5V, making it suitable for various power sources.
• Low Output Voltage: The LM27951SD provides an output voltage range of 2.5V to 3.9V, ideal for driving LEDs in backlight applications.
• High Frequency Operation: With a frequency of 750kHz, the LM27951SD offers high efficiency and fast response times.
• Surface Mount Package: The LM27951SD is available in a surface-mount package,PCB。

LM27951SD Applications

The LM27951SD is ideal for backlight applications, such as:

1. LCD Displays: The LM27951SD can be used to drive the backlight LEDs in LCD displays, providing uniform brightness and energy-efficient operation.
2. LED Lighting: The device can be used in LED lighting applications, such as automotive lighting, where precise brightness control and energy efficiency are crucial.
3. Portable Devices: The LM27951SD can be used in portable devices, such as smartphones and tablets, to drive the backlight LEDs, providing a slim form factor and low power consumption.

Conclusion of LM27951SD

The LM27951SD is a versatile, high-performance LED driver from Texas Instruments, designed for backlight applications. Its unique features, such as internal switch, four output channels, and PWM dimming, make it an ideal choice for various backlighting applications. However, it is important to note that the LM27951SD is not recommended for new designs. Despite this, it remains a reliable solution for existing applications that require a high-performance, switched-capacitor LED driver.