HV9911NG-G-M934

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The HV9911NG-G-M934 is a high-efficiency, low-side, PWM dimming LED driver from the Power Management IC (PMIC) – LED Drivers family. The chip provides 96% efficiency to the programmed current range, and can provide a wide range of current settings and offers multiple brightness, dimming and control options. The chip can operate in a variety of topologies with a wide input voltage range of DC 5V- 36V. Typical applications for the HV9911NG-G-M934 include general lighting, replacement bulbs, automotive lighting and lighting displays.

The HV9911NG-G-M934 offers a variety of options which make it suitable for a wide range of applications. First, its dual-mode dimming feature allows both PWM and analog dimming control. This allows makers to select the best dimming method depending on their project requirements. Second, its wide voltage/current operating range (AC 0V – 36V; DC 0V – 36V, 1A – 3A) provides opens up usage scenarios for a wide stack of current applications. Third, its high efficiency and low supply dissipation makes it an ideal choice for a variety of energy-saving applications. And last, the HV9911NG-G-M934 can be controlled by MCU, which provides unmatched flexibility for various dimming control.

The working principle of HV9911NG-G-M934 is as follows: The chip operates in an asynchronous buck topology, with integral MOSFETs used on the input and output sides. The control loop is closed by a feedback control circuit which monitors the LED voltage and current. Depending on the project requirements, the feedback control can be programmed to maintain fixed output voltage or current. The output voltage (VOUT) is divided down from the input voltage (VIN) by the internal buck converter. The dimming duty cycle is determined by an internal duty control circuit which regulates the duty cycle in order to achieve the desired brightness level.

In conclusion, the HV9911NG-G-M934 IC is a high-efficiency, low-side, PWM dimming LED driver from the family of PMIC – LED drivers. From its wide input voltage range and multiple dimming/control options to its high efficiency and integrated MOSFETs, it offers numerous options for a variety of applications in general lighting, replacement bulbs, automotive lighting and lighting displays. Furthermore, its closed-loop feedback control ensures accurate control over the LED output voltage or current depending on the user-defined settings.

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