HV9919BK7-G Integrated Circuits (ICs)

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HV9919BK7-G Application Field and Working Principle

The HV9919BK7-G is an LED driver, which is a type of power management integrated circuit (PMIC). It is used to control, monitor, and protect LEDs. The device is designed to be used in a wide range of applications from low-power indicator LEDs to high-power displays and lighting, offering advantages such as high efficiency, low cost, and small size. The HV9919BK7-G is a constant-current LED driver, which means that it is able to ensure that the LED is supplied with a consistent current regardless of the input voltage variations.

Features of the HV9919BK7-G include a wide input voltage range, 2.4V – 5.5V, shut down pin for added security, adjustable frequency, and thermal shutdown protection. The device is capable of driving up to 10 LEDs connected in series at 35V and 500mA. This LED driver also includes a flexible dimming feature, with either PWM or analog dimming interface support. The HV9919BK7-G can also provide over-voltage and over-temperature protection for the LED load, as well as output short-circuit protection for improved safety.

The device operates by using the principle of voltage and current regulation. The voltage is regulated through a voltage reference, while the current is regulated by the internal circuit. The output voltage is monitored by an error amplifier, and if it detects a difference between the actual and set value, it will adjust the current accordingly. The current then flows through the sense resistor to the output, and the current is regulated by adjusting the duty cycle of the internal oscillator.

The HV9919BK7-G is a highly efficient and reliable LED driver, offering a wide range of features and protection. It is ideal for applications where a constant current is needed to power an LED load. The device is compact and cost-effective, making it a great choice for a variety of applications.

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