STP1612PW05MTR Integrated Circuits (ICs)

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The STP1612PW05MTR is a part of a range of LED Drivers that are part of PMIC (Power Management Integrated Circuits) designed by STMicroelectronics. The LED driver operates in DC-DC buck mode and is designed for automotive interior and exterior lighting systems. It features a wide input voltage range from 4.5V to 55V with a wide output voltage range from 0V to 18V. The high efficiency and powerfactor correction capabilities of the STP 1612PW05MTR makes it an ideal choice for automotive lighting applications.

The design of the STP 1612PW05MTR is optimized for low-side resistor current-sensing in automotive applications. The device provides a 0.5A maximized current, up to 1.5A output current (depending on thermal constraints). It also offers high efficiency, fast load transients, power factor correction and precise current regulation.

The application field of the STP 1612PW05MTR ranges from providing automotive interior and exterior lighting such as position lights, headlights, fog lights, brake lights, tail lights, etc. Also, it can be used in automotive batteries, automotive power strips, decorative lighting and other automotive applications.

The working principle of the STP 1612PW05MTR is based on a buck DC-DC converter architecture. The converter uses its duty cycle to regulate the output voltage and current. When the voltage drop across the resistor is below the reference voltage, the duty cycle is increased in order to get the desired output voltage. The average current (ILED) regulated by the device is equal to the DC output current.

The STP 1612PW05MTR also features an integrated current-sense amplifier, which is used to measure the voltage drop across the output current-sensing resistor. The current sense control comparator sets the duty cycle of the PWM controller to the minimum (off) on a negative current-sense signal. The PWM controller senses the input voltage, output voltage and the current-sense resistor and controls the output voltage and current to the set levels. The integrated voltage regulator controls the output voltage. When the output voltage exceeds the upper clamp level, the device switches off the external MOSFET switch.

Additionally, the STP 1612PW05MTR incorporates various self-protection features such as overvoltage protection, under-voltage protection, over-temperature protection, over-current protection and thermal shutdown.

In conclusion, the STP 1612PW05MTR is a high-quality and high-performance LED driver that is part of the PMIC (Power Management Integrated Circuits) family and is ideally suited for automotive interior and exterior lighting applications. It utilizes current-sensing technology, wide input and output voltage ranges, precisely regulated output current, high efficiency and power factor correction, as well as a range of self-protection features making it an ideal choice for automotive lighting applications.

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