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IS32FL3738-ZLA3 application field and working principle

PMIC - LED Drivers refers to devices that control and manage the power supply to Light Emitting Diodes (LEDs). IS32FL3738-ZLA3 is a state-of-the-art integrated solution for driving Power LEDs from a single supply by utilizing a Half-Bridge MOSFET as the primary switching device.

Application Field

IS32FL3738-ZLA3 is designed for a wide range of LED applications and is suitable for lamps, backlighting, flash, halogen, ultra-violet, and laser equipment, lighting for automotive, industrial, medical, and general applications. The IC can also be implemented in applications such as fax machines, digital cameras, portable devices and other pulse lighting systems.

Working Principle

IS32FL3738-ZLA3 uses an optimized current sensing technique to regulate a constant LED current with a minimum number of components. The voltage at the Sense Pin is compared to a fixed internal reference voltage, which is set to regulate each channel’s current between 500 to 1200 mA. The single-line input for the IC enables it to be used in various applications as it eliminates the need for complex cable and wiring systems.

The IC is based on MOSFET technology and is capable of delivering up to 8 A per channel. The device is also power efficient as it utilizes an advanced burst-mode operation. The internal operation and control of the device is based upon an advanced switching algorithm, which allows it to maintain high-speed operation while keeping the LEDs, current and temperature at an optimal level.

IS32FL3738-ZLA3 is a green device as it can be used in low-power and low-voltage applications. The IC also provides protection features such as under-voltage lockout, cycle-by-cycle current limitation, over-temperature, and over-current protection.

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