RT7320GSP Integrated Circuits (ICs)

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The RT7320GSP is a highly integrated, multi-channel, PWM-controlled LED driver conforming to the PMIC - LED Drivers category. It can support up to 4 independent channels/strings of LEDs. With dedicated output enable, dimming control and current mode control functions, the RT7320GSP supports up to 350mA per channel, providing an overall combined current of up to 1.4A.

The RT7320GSP can be programmed to drive each output at specific levels, and is designed to work over a wide input voltage range from 1.6V to 17V. It supports boost and buck modes, as well as forward, reverse and open drain configurations. The device is designed to offer an optimal current linearity up to 17V, and also supports a wide open drain voltage range up to 24V.

The RT7320GSP benefits from a wide range of features that make it suitable for a variety of applications, including LED lighting, LED video displays, LED backlighting and LED matrix panel. Thanks to the integrated high-efficiency LED driver IC, the RT7320GSP is ideal for efficient and cost-effective LED design. Internal current sensing and open-loop voltage mode control ensure excellent light uniformity, and the integrated PWM dimming and pulse width modulation mode allows for flexibility in the design. The device can further be protected by an adjustable current limit, overvoltage protection, soft start and thermal shutdown. The RT7320GSP is in a tiny, surface mount TSOT-23-6L package and is halogen free and RoHS compliant.

Working Principle

The working principle of RT7320GSP is fairly straightforward. It consists of four high-voltage current-sense PWM control channels that provide a fixed-peak current output to the LED strings. Each channel can be independently programmed and configured, making it simple to control the outputs. An external feedback voltage input is used to maintain the output current. Also, the device integrates a power feedback pin to monitor the load current of each LED string.

The RT7320GSP also has a Boost+ power stage, which is a synchronous buck-boost regulator and allows for LED driving at any voltage. The Boost+ power stage supports up to 500mA of limited current from an input voltage ranging from 2V to 17V. The PWM control allows for constant current regulation, enabling accurate adjustment of output levels for each LED string. Moreover, the RT7320GSP benefits from a wide input voltage range, a wide PWM dimming range and low ripple current on the output.

The RT7320GSP is a reliable and efficient LED driver, offering flexibility, accuracy and reliability in LED driving. With its features, it is suitable for a wide range of LED-based applications, and its easy-to-use design provides a lightweight and cost-effective solution.

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