HV9910BNG-G-M934 Integrated Circuits (ICs)

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The HV9910BNG-G-M934 is a multi-topology constant current controller, specifically designed to drive LEDs in string applications including those in mobile devices, LCD backlights and general lighting. This chip can also be used to drive halogen lamps and provides precise brightness control over a wide range of current. It is designed specifically to provide high current and thermal performance.

The HV9910BNG-G-M934 contains two differential amplifiers, an amplifier feedback network and a ramp generator with the ability to detect changes in the output of the LED string, allowing the current through the LED string to be optimally regulated for stability in brightness and efficiency. It automatically adjusts the current based on the actual loading, providing an excellent solution for applications requiring precise current regulation.

The HV9910BNG-G-M934 is also capable of providing thermal protection of the string. It has an optional internal thermal protection feature which shuts off the current when a temperature threshold is exceeded. This ensures that the LEDs are safe from any thermal damage, while the chip also features a very low thermal resistance of 1 degree Celsius per watt.

The chip is capable of driving up to 3 strings at 12V or 6 strings at 24V, with a maximum current of 1.2A. It is capable of providing a dimming range of up to 1/256 with an effective resolution of 16 bits. It also features an LED open and short circuit detection which can be used to detect faults and help protection against LED failure.

The HV9910BNG-G-M934 is also capable of providing multiple topologies such as buck and boost. This allows for fast and efficient power conversion for multiple LED string applications. It also provides user-selectable output voltage, allowing the user to select the desired level of brightness for their application.

In summary, the HV9910BNG-G-M934 is a high-performance and efficient power conversion chip specially designed to provide brightness control of up to 1/256 of the total output current, with excellent thermal performance. This chip can be used in a variety of constant current LED driving applications, including those in mobile devices, LCD backlights and general lighting.

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