GAPTEC-Electronic GmbH & Co. KG

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LEDT16_24 – Rev. 2018-1.1

Specifications subject to change without notice.

LEDT16_24 Series

Constant current power LED Driver - Wide Input - Non-Isolated & Regulated

Digital dimming control

Analogue dimming control and application sample

Io_set refers to the expected output current value.

Io_norm refers to the rated output current

D refers to the pulse width of the PWM signal

T refers to the cycle of the PWM signal

Note: The formula only supplies as a reference, and the output current

may be a little deviation with different load. The Ton(min) of PWM signal

must be greater than 0.7ms, or the driver can’t be operated normally.

It is natural for the driver to generate an audibly noise in dimming pro-

cess, because the frequency of the control circuit is within human au-

dibly range (20Hz~20KHz). In order to avoid the human eye can observe

the LED flashes, the PWM dimming frequency is recommended to set

above 100Hz.

Analogue dimming circuit

Analogue input voltage vs. output