LM3406HVQMHQ1

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The LM3406HVQMHQ1 is an integrated power management integrated circuit (PMIC) that is specifically integrated to provide efficient power conversion, enabling it to be utilized in a wide range of applications, including LED drivers. The device includes a high voltage Wide Input Voltage Range (VIN) of up to 36V and relatively low current (Ohms) of up to 2.6A.

The device’s output voltage can be adjusted with a 0.1V increment, enabling it to be set between 4V and 6V. The dual-mode current sense amplifier allows the current limit to be set at 0.1A up to the maximum power limit of the device, which is 26W. Additionally, the device provides soft-start, thermal protection, under-voltage lockout, and over-voltage protection.

The LM3406HVQMHQ1 is particularly robust, featuring an Underwriters Laboratories (UL) Recognition for ‘‘Recognized Component for Use in Supply Circuits Incorporating Dedicated Function Overcurrent Protection’’. Moreover, the device is compliant with both RoHS and WEEE directives and supports wet slumping designed for lead-free solder reflow.

Working Principle of LM3406HVQMHQ1

The working principle of the LM3406HVQMHQ1 is based on the linear switching regulator, which offers flexible control of the output voltage. The device includes an internal high power, high voltage, adjustable controller that is capable of providing a maximum output current up to 2.6A. The device is based on the Buck and Boost topology, which can be utilized to step down or step up the output voltage, based on the current requirement.

The device includes a power MOSFET with a low Rds(on) and a high PWM frequency. The power MOSFET is controlled by a current based Control Gate drive, which is based on the two-level control architecture. The high frequency PWM switching reduces the switching losses from the device, enabling the device to provide high efficiency. Additionally, the device includes a current sense circuit which monitors the current level and provides feedback to the base and the inhibit control, which is utilized to limit the supply current and provides a smooth start-up.

The device also includes a temperature compensation circuit, which detects the temperature of the power MOSFET and maintains the device’s performance and reliability. The low ESR capacitor, which is integrated into the device, helps to reduce the output ripple and prevents the output voltage from oscillating. Additionally, the device includes an input voltage feed-forward that is responsible for maintaining a stable output voltage despite sudden changes in the input voltage.

Applications of LM3406HVQMHQ1

The LM3406HVQMHQ1 integrates the functionality of a high power, high voltage, current adjustable switching regulator, making it suitable for a wide range of applications, including:

• Automotive Electronics
• LED Drivers
• Power Supplies
• Portable Electronics
• Solar and Wind Power Systems
• Adaptive Front Lighting Systems (AFS)

The device’s high output current allows it to drive LEDs at a high brightness, up to 50mA. The device includes an Initiation Pin (INTR), which enables the device to be initialized via an external signal. This makes the device suitable for remotely monitoring and controlling the voltage output. The device is capable of soft-starting and restarting, which reduces the inrush current, thereby protecting the system from the undesirable effects of sudden current surges. Additionally, the device is designed for easy implementation and does not require any external components for implementation.

The device is designed to be used in automotive electronic applications, where it can be utilized to control the voltage output. The device is also designed to ensure compliance with the stringent requirements of the international standards, including car crash test and environmental regulations, such as the International Standards (ISO) specification and the European CO2 regulations. The device is also certified to meet the automotive requirements specified in AEC-Q100.

The LM3406HVQMHQ1 is an integrated PMIC which offers a wide input voltage range, current adjustable output voltage, and robust protection features. Its integrated features make it suitable for a wide range of applications, including LED drivers and automotive electronics.

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