MAX16833AUE/V+TQA

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MAX16833AUE/V+TQA is a PMIC - LED Driver that offers a wide variety of features and benefits handled through a simple input and output interface. By closely scrutinizing the individual functions the device provides, it is easy to understand the specific applications and the principles it functions on.

MAX16833AUE/V+TQA is a highly efficient LED driver featuring a dual-channel LED controller and programmable LED brightness control. The device has a wide range of input/output features and an integrated 6-channel LED backlight control for LED displays and anti-glare/diffuse backlighting. The MAX16833AUE/V+TQA delivers high performance and high efficiency in a compact package, reducing total solution size and allowing for increased system cost savings. This IC is designed for driving single and dual channel LED strings for applications such as LCD TVs, LCD monitors, and LCD touch screens.

The MAX16833AUE/V+TQA provides high output current and has integrated Boost, Boost+Dimm and LED dimming functionality. LED dimming is provided loosely, which improves the overall lifetime of LED strings by not exceeding the LED junction temperature (JT) limit and accurately controlling the individual LED current levels. The resistor RI service current maximum load is 200mA, and the output current can be adjusted through the Iout pin. It supports adjustable current levels, up to 3A peak. The device also supports a wide input voltage range of 5V to 24V and is rated for both 2.7V and 5V Low Voltage Logic.

The detailed working principle of this MAX16833AUE/V+TQA PMIC – LED Driver is based on the Pulse Width Modulation (PWM) method. When the input signal is applied to the control pins (D1CTL and D2CTL), the Pulse Width Modulation uses an oscillator frequency to function its On and Off cycles. In this way, it switches the current in a cyclical way resulting in an average current that is proportional to Pulse Width Modulation duty cycle. The MAX16833AUE/V+TQA then provides the desired output current for the LED strings, based on the Iout adjustment in the internal resistor.

The MAX16833AUE/V+TQA has a variety of features such as over-temperature protection, auto-dim brightness control, in-rush current limit and short-circuit protection. The control signals are gradually pulled from the pins as the temperature increases to prevent over-heating. This device also features a novel fuzzy-logic auto-dim brightness control algorithm for implementing user-level brightness setting in addition to the PWM backlight control. This adds more user-friendliness to the overall operation and handling of the LEDs.

The power stage of the MAX16833AUE/V+TQA consists of an N-type MOSFET to monitor and control the current flow to the LEDs and a P-Type MOSFET to provide a balanced charging time for both the Floating and Cycling Modes. In the Floating Mode, the N and P MOSFETs are ON and in the Cycling Mode, only the N-MOSFET is ON, as the string current is drawn from the N-MOSFET. This acts as a Smart Current Loop and is suitable for driving multiple LEDs or driving a single high-current string. The output of the device is adjustable between 2.1A and 3A for 12V step-up supplies.

MAX16833AUE/V+TQA PMIC – LED Driver offers customers a lot of features for their LED projects. It is a robust and efficient solution that can be easily adapted and applied to a wide array of applications including LCD televisions, LCD monitors, and LCD touch screens. The advanced circuit design of MAX16833AUE/V+TQA comprises of multiple protection and wide input/output features that make it a safe solution, while maintaining high LED performance at the same time. The device functions based on the Pulse Width Modulation principle, using an oscillator frequency to switch currents, resulting in the desired output current.

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