Data Sheet

GAPTEC-Electronic GmbH & Co. KG
[e-mail] – www.gaptec-electronic.com
Page 4 of 6
LEDW10_24 – Rev. 2016-1.0
Specifications subject to change without notice.
LEDW10_24 Series
Constant current power LED driver - Wide Input - Isolated & Regulated
PWM dimming control
For PWM dimming signals with a certain frequency, the output current of
the driver is related to the duty ratio of PWM signal. Refer to the
formula for the calculation method:
Where, Io_set represents required output current (mA); D represents the
duty ratio (%) of PWM signal; T represents the period (ms) of PWM signal;
and Io_norm represents the rated output value (mA) of the driver.
Note: The formula is for reference only; and deviation of output current
may exist due to various loads. The min. conducted time of PWM signal
shall not be less than 0.8ms, or the product will be in abnormal operation;
in case of low voice from the driver during PWM dimming, it is normal
since the PWM dimming frequency is within the auditory frequency range
of human ears (20Hz-20KHz in general). To prevent seeing flash of the
LED by human eyes, it is suggested to set the PWM dimming frequency
between 100-200Hz.
EMI/RFI conducted EN55022 Class B recommended circuit
Components Specifications
C1 225K/50V 1210 ×7R
(TORCH)
C2, C4 104K/50V 1210 ×7R
(TORCH)
L1 PI043-131MT (SHENZHEN
CEAIYA)
Note:
The voltage drop of all LEDs in the datasheet is 3.3-3.8V（during actual application, the number of
LEDs can be confirmed based on the actual voltage drop and output voltage of LEDs.
This product does not support hot-Plug use.
Analogue dimming control and application sample
Analogue dimming circuit Analogue input voltage and output current
LEDW10_24-xxx
LEDW10_24-xxx
LEDW10_24-xxx