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HV9910B LED DRIVER

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Component Identification Started by frisky2good Yesterday at 6: I can easily be wrong also. Welcome to our site! You must log in or register to reply here. The HVB requires only three external components apart from the power stage to produce a controlled LED current making it an ideal solution for low cost LED drivers. Have you added the input bulk capacitor? IoT – Internet of Things.

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The power conversion stage of the HVBDB2 consists of a diode bridge rectifier, followed by a current-controlled buck Have you added the input bulk capacitor?

PWM dimming response is limited only by the rate of rise and fall of the inductor current, enabling very fast rise and fall times. You have no bulk capacitor; see section “Input Bulk Capacitor” in the datasheet for details. The circuit is very simple. The HVB requires only three external components apart from the power stage to produce a controlled LED current making it an ideal solution for low cost LED drivers.

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Component Identification Started by frisky2good Yesterday at 6: Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Thread starter aminbehravan Start date Jul 9, Click here to register now. Sampling Options Lled Now.

Welcome to our site! The HVBDB3 can be configured to hhv9910b in either a constant frequency mode for driving a single LED or in a constant off-time mode for driving two IoT – Internet of Things. First I thought that the FET is connected wrong, but the schematics were kind of “upside-down”.

Off-Line, High Brightness, LED Driver Demo Board

The diode connected to the mosfet and inductor should be fast. It also includes a 0 – mV linear dimming input which can be used for linear dimming of the LED current. Can you show a photo of your circuit?

Application Notes Download All. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Analog Simulation – HVB. It includes an 8. By continuing to use this site, you are consenting to our use lec cookies.

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For pricing and availability, contact Microchip Local Sales.

In Production View Datasheet Features: I can easily be wrong also. The most obvious problems will be due to incorrect hv991b and defective or missing parts.

Also, double check your connections. The HVB can be programmed to operate in either a constant frequency or constant off-time mode.

Off-Line, High Brightness, LED Driver Demo Board

My quess is that the circuit hf9910b the Vin above the maximum limit the IC can handle. The board features a low component count and long life operation due to the absence Buy from the Microchip Store. What is connected to the LED connection. Please contact sales office if device weight is not available. Media New media New comments Search media. For a better experience, please enable JavaScript in your browser before proceeding.