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DC Dimmer power supply shuts down when initially powers up

By |2019-07-10T12:23:27+01:00July 10th, 2019|Categories: |

When a DC dimmer is wired directly to an electronic transformer, some transformers enter protection mode during the initial power up. Generally, the cable length is < 100mm.  You can extend the cable length between the power supply and DC dimmer by 100mm should this occur

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Dimmable MR16LED’s flick or flash when turned on at low light level

By |2017-07-17T11:20:47+01:00July 17th, 2017|Categories: |

This is a function of the transformer/MR16 LED interaction. Since the transformer must first turn on using the LED lamp current feedback, the lamp and transformer reacts to the dimmer bus voltage once the lamp is stable. A flash or flick can sometimes be observed if the lamp is turned on below approximately 50% intensity. [...]

Dimmable MR16’s do not turn on

By |2017-07-17T11:18:52+01:00July 17th, 2017|Categories: |

Most electronic transformers employ self oscillating methods which rely on the load current for oscillation, hence the characteristic minimum load requirements. Since LED lamps consumes much less power (current) than it's halogen counterparts, it could be that the lamp current is too little to initiate the transformer oscillation and hence turn on. This is especially [...]

When dimming down, the LED’s turn off

By |2017-07-17T11:17:56+01:00July 17th, 2017|Categories: |

Although the dimmer did not turn off while dimming down, the LED's, especially some MR16's with electronic transformers, do turn off. This is once again a function of the control circuit electronics as above and/or the interaction and characteristics of the MR16/transformer combination. It was found that if the dimmer's lowest light output level is [...]

Dimmable flicker at low light output

By |2017-07-17T11:16:41+01:00July 17th, 2017|Categories: |

There are many different types of control circuits employed in dimmable LED's. Some of the circuits or control IC's might not be able stabilise the LED at very low light output, especially in areas of low supply voltage. This however usually only occur at fairly low light output Dim to the lowest light level and [...]

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