IS32BL3554-ZLA3-TR

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The IS32BL3554-ZLA3-TR is an off-line, synchronous step-down LED driver. It reduces board space by integrating a controller, current sources, and low-side switches for multiple strings of LEDs onto a single chip. This device is suitable for use in a variety of lighting and home or building automation systems with multiple LED channels.

The Unique Feature of the IS32BL3554-ZLA3-TR is its high power density and high efficiency. The device can operate up to 3 W per channel and provides up to 94.5% efficiency. The IS32BL3554-ZLA3-TR supports constant current, Pulse-Width-Modulation (PWM), and 1-10 V dimming protocols and is able to regulate output voltage and current to keep LEDs in their optimal operating range. It also features a universal input range of 90 to 305 VAC, allowing it to be used in multiple applications and regions, as well as a variety of thermal protection functions.

The device is capable of providing dimming levels from 100% to 0.3% of the LED total power with a 1 - 10VDC dimming waveform. It is also adjusted to the LED current, with bridge-type LED current sources that are adjustable with resistors. The IS32BL3554-ZLA3-TR has a drain-source on resistance (RDSON) of 35m Ohms, making it an ideal choice for LED applications that require high power density, such as streets and residential/commercial/industrial lighting.

The working principle of this device is based on the synchronous rectification and the use of low-side switches to minimize the conduction and switching losses. The IS32BL3554-ZLA3-TR applies a fixed frequency peak current control method to regulate the LED current, making it programmable with a resistor and supports constant current-multiplier topology. It also features an internal start-up circuit and protects against a wide array of abnormal conditions, such as overvoltage and overtemperature, making it reliable and durable.

The IS32BL3554-ZLA3-TR is well suited for use in a variety of applications, such asresidential and commercial lighting, automotive lighting,street and exterior lighting,and industrial automation. Its high efficiency, reliable operation, and programmable current level make it an ideal choice for powering LEDs for these applications.

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