MAX8830EWE+T

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The MAX8830EWE/+T products represent a family {1} of low-power, low-voltage, step-up DC-DC converters that are specifically designed to drive high-brightness LEDs (HB LEDs). These converters are typically used in battery-powered portable equipment, such as smart phones and digital cameras. The converters of the MAX8830EWE/+T family make these products highly attractive due to their low cost, low profile and easy integration into the existing circuits.

The MAX8830EWE/+T family of step-up converters is operated with a fixed operating frequency. The range of input voltage is from 2.5V up to 5V, while the output voltage can be configured externally. The MAX8830EWE/+T devices can accept an input voltage {2} as low as 2.5V, making them suitable for portable equipment applications. The efficiency of the converter is optimized for light to medium load current {3}.

The MAX8830EWE/+T devices possess a novel architecture that enables high efficiency and adjustable currents. The {4} implement a hysteretic architecture which requires no external inductor. All components are integrated into a small package that simplifies the board layout. The operating current can be adjusted through a single external resistor. Highly stable operation is guaranteed over a wide input voltage range.

The MAX8830EWE/+T family uses a synchronous architecture, which ensures minimum loss and high efficiency. The integrated mechanism of synchronous rectification {5} eliminates the need for external switching transistor, which eliminates the power losses due to parasitic elements. This reduces the losses required to drive one LED, thus increasing the overall efficiency of the device. Maximum LED current control is possible with a single external resistor. The maximum LED current can be optimized to achieve the best efficiency.

The MAX8830EWE/+T family also offers integrated current limit protection {6} to ensure safe and economic operation, as well as thermal protection to ensure safe conditions during operation. The current limit protection can be set at a given level, which protects the device from {7} over-current conditions. The thermal protection shuts down the device if the device temperature rises above a certain level. The devices also feature over-voltage protection, which ensures that the LED current is kept within specified limits.

The MAX8830EWE/+T devices offer a wide operating frequency range, with adjustable output and current levels. The devices can be configured to provide a constant output current {8}. This feature makes the devices ideal for applications such as smart phones, digital cameras, automotive signal processing and miniaturized lighting equipment. The devices are available in a tiny, 4mm x 4mm QFN package, allowing easy integration into system level design.

In conclusion, the MAX8830EWE/+T family is an ideal solution for driving high-brightness LEDs. The family of step-up DC-DC converters offers low power consumption, low voltage and wide operating frequency range. The adjustable output current and voltage allows flexible control of the LED current and ensures maximum efficiency. The devices are easy to integrate, small in size and offers protection features for safe operation.

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