MAX16826BATJ/V+

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PMIC – LED Drivers are integrated circuits manufactured to drive and power light emitting diodes (LEDs). These circuits usually contain a combination of memory and logic functions, an array of external components, and some transistors and MOSFETs to drive the LEDs. The MAX16826BATJ/V+ is designed specifically for driving up to 3 LEDs used in applications like cellular handsets and portable games. It is an integrated step-up DC/DC converter with a low-voltage power supply input and high-current push-pull output.

Features of MAX16826BATJ/V+

The MAX16826BATJ/V+ offers numerous features that are advantageous in driving LEDs. It provides two output current levels for manual or ASYNC programmable dimming control. With its Fast DIM pulse generation capability, it enables fast brightness level changes. Its push-pull output structure eliminates externally added isolation capacitors, resulting in a small footprint. The LED driver operates with a wide input range (2.5V to 4.2V) with only two external components: a resistor and a ceramic output capacitor. The device also includes an internal hysteresis circuit which tracks junction temperatures to maintain a constant LED current. NanoTrack current control technology provides outstanding line and load regulation. With its internal thermal and under voltage protection, the MAX16826BATJ/V+ ensures reliable operation over the complete temperature range.

Application Fields of MAX16826BATJ/V+

The MAX16826BATJ/V+ can be used in a number of applications such as cellular handsets, portable games, projection systems, backlights for LCDs, displays and signs, automotive exterior lighting, architectural lighting, and surveillance systems. It supports up to 3 LEDs and features a wide input voltage range, high power efficiency, and low standby current. It is designed to meet the needs of the ever-tightening requirements of power efficiency and miniaturization in demanding consumer electronics products.

Working Principle of MAX16826BATJ/V+

The MAX16826BATJ/V+ is a step-up DC/DC converter with a low input voltage power supply and high current push-pull output. It consists of several integrated devices including a voltage regulator, MOSFETs, inductor, and a PWM controller. The PWM controller produces the high frequency switching signals that are used to switch the MOSFETs in the converter. The voltage regulator controls the output voltage by controlling the MOSFETs on and off times. The inductor stores energy during the on times of the MOSFETs and delivers it during the off times. The output voltage is determined by the duty cycle of the PWM control signal and is also regulated by the output current monitoring circuit. The output current is monitored through a sense resistor and the voltage across it is amplified to produce a voltage-controlled current-source (VCCS) signal that is used to control the MOSFET on-time.

In summary, the MAX16826BATJ/V+ is an integrated step-up DC/DC converter designed to operate at a wide input voltage range and deliver high current push-pull output current. It features manual or ASYNC programmable dimming control, Fast DIM pulse generation, and excellent line and load regulation. It also offers thermal and under voltage protection to ensure reliable operation over the complete temperature range. This makes it ideal for applications such as cellular handsets, portable games, and projection systems.

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