TPS92411PDDA

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The TPS92411PDDA is a high voltage, low current charging pump IC with built-in power FET and 5-LED current mirror output. It is designed to drive up to five LEDs in bright colors and is ideal for applications such as ambient lighting and backlighting. This device supports various logic control functions such as switching of one or two LEDs, PWM dimming, and serial data capability, which makes it suitable for complex display applications. By applying a high voltage to the leftmost diode and a low voltage to the rightmost diode, the external power FET is activated, and the LED current-sharing amplifier is turned on. The center diode and the two LEDs are powered by the internal FET and regulated by the current-sharing oscillator.

The TPS92411PDDA can be used as a boost converter, providing a constant 5V, 2A output and up to 80% efficiency. It can be driven with input voltage of up to 2.5V and, when in power saving mode, can drop down to a supply current of only 3.2μA. The TPS92411PDDA has additional power management functions such as over-temperature protection, over-voltage protection, under-voltage lock-out, reverse current protection and load regulation. In addition, the device can be configured to provide output current or brightness control via an external voltage input or applied PWM signal.

The TPS92411PDDA allows for simple control of the LED current with the use of a single control signal. The signal is used to regulate the output voltage from the internal regulator, allowing for a linear or PWM control scheme. The linear control scheme is useful for controlling the brightness of the LED by controlling the duty cycle. The PWM control scheme allows for smooth and flicker-free dimming of the LED brightness. In addition, the device also offers a mini I2C interface for adjusting the output current and for monitoring the system’s operating conditions.

In summary, the TPS92411PDDA is an ideal solution for applications where multiple LEDs need to be driven with constant current. It offers a high efficiency, low noise design that can be used in a wide range of applications such as mobile phones, LCD displays, laptops, TVs, automotive lighting and more. The device can be driven with a wide input voltage range and offers various features, including adjustable current, PWM dimming control, mini I2C control and protection functions, making it a flexible and reliable solution for LED driver applications.

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