LV5028TT-TLM-H

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LEDs are widely used in many lighting applications, such as automotive headlamps, interior lighting and external lighting signs. Power management integrated circuits (PMICs) play an important role in driving and controlling these LEDs to ensure their performance, reliability, and longer service life. The LV5028TT-TLM-H is a high-performance PWM-type LED driver IC designed to provide superior performance and low power consumption for automotive and industrial lighting applications.

The LV5028TT-TLM-H is a high-efficiency, high-performance PMIC consisting of a dual high-voltage PNP power switch and a 1.5V to 30V adjustable low dropout (LDO) regulator for driving multiple LEDs. It features optimized bilinear dimming which offers up to 10% linear dimming compared to traditional PWM dimming, ultra-fast transient response times of only 500ns, and low quiescent current of only 78µA. The LED driver IC also features a host of protections including over-temperature, over-voltage, and over current/short-circuit protection to ensure the highest reliability in applications.

The LV5028TT-TLM-H is a two-switch, constant current mode LED driver IC, with an adjustable primary side EMI filter. It has a wide operating temperature range and is designed to drive up to two LEDs with a maximum output of 3A. The output voltage range is adjustable to match the LED’s Vf over a 0.9-30V range, making it suitable for a wide range of LED applications. It also features a wide input voltage range of 10-45V and a wide dimming range of 0.5-100%.

The general working principle of the LV5028TT-TLM-H is quite simple. The PNP power switch controls precisely the current output from the IC to the LEDs. The output current is adjusted according to the dimming ratio set by the external resistor. When the input voltage is below the regulation voltage, the IC will cut off the power supply to the LEDs to protect them from over-current or voltage. The LDO regulator also plays an important role in regulating the output voltage, as it is adjustable from 0.9-30V in order to meet the voltage requirements of different LEDs. This ensures that the LED current remains constant, even if the input voltage changes.

The LV5028TT-TLM-H is suitable for a wide range of automotive and industrial lighting applications, such as automotive headlamps, dashboard displays, back-lighting, signage and outdoor lighting. It is highly reliable and energy-efficient and offers superior performance compared to other LED drivers. The wide input voltage and dimming range, together with the adjustable LDO regulator, enable the LED driver IC to be used in a variety of applications in order to drive multiple LEDs with different current and voltage requirements.

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