LTC1321ISW#TRPBF

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The LTC1321ISW#TRPBF is an 8-pin integrated circuit designed for driving high-back EMF LEDs. It belongs to the interface drivers, receivers, and transceivers classification which are indispensable for digital communication and power transmission.

The LTC1321ISW#TRPBF is a highly efficient driver with 1SC forward voltage drop. It integrates a low-voltage P-channel MOSFET that helps minimize power consumption when driving a string of LEDs and a bias current source that maintains the average forward voltage drop. It can provide a constant current to the LEDs while maintaining a low forward voltage drop. Moreover, it provides a high output current up to 500 mA. It also has a shutdown feature that can be activated by an external step-down regulator or a logic control.

The operating range of the LTC1321ISW#TRPBF is between 4 and 36 V which makes it ideal for driving multiple LEDs in different voltage supply environments. The quiescent current of the driver is only 20 μA which allows for a very low power consumption, making the circuit ideal for applications where power consumption needs to be kept to a minimum. It also has an input current limit of 8 mA and its quiescent current changes from 20 μA (default) to 5 μA depending on the output current limit. This means that this driver can operate in multiple supply voltage scenarios with no additional design or power management features.

The LTC1321ISW#TRPBF has a wide range of applications, including backlighting for LCD displays, flash illumination, and system status indication. The driver also can be used for lighting applications in areas where bright light is required, such as car dashboards, residential and commercial spaces.

The LTC1321ISW#TRPBF is composed of a low voltage P-channel MOSFET, a bias current source, and a controlling logic. It operates in an open-drain configuration. When the output is high, a voltage is applied to the gate of the P-channel MOSFET and the path is entitled to current flow. When the output is low, the gate-source voltage of the P-channel MOSFET is disabled, and the current is stopped. A feedback terminal monitors the output voltage of the LED string and maintains the LED string\'s forward voltage drop constant to regulate the LED current.

The LTC1321ISW#TRPBF driver is available in a 5-pin SOT23 or an 8-pin MSOP package that is suitable for a wide range of applications with a fast switching time and a low quiescent current of only microamps. It offers a wide supply range of 4-36V and allows for a high input voltage range, allowing users to minimize the number of components and cost associated with the power stage. It is RoHS compliant, meets the demand of AEC-Q100 grade 1 requirements, and has been tested to more than 3000 hours at a temperature above 100°C.

The LTC1321ISW#TRPBF is a high-efficiency and low-power driver that can be used in a wide range of applications where fast switching, high current, and low forward voltage drop are desired. It is ideal for driving multiple LEDs in different voltage supply environments and offers a wide range of features, such as a low quiescent current, a shutdown feature, and wide range of applications.

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