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.
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”.
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?
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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.