The DLED-B step-up driver is designed to power LEDs with a power of 20 to 50 watts, with a nominal supply voltage of 28 ... 34 volts and a current of 300 to 1500 milliamperes. For boards with an output current from 300 to 900 mA (for example, LEDs with a power of 20 or 30 watts, with a nominal forward voltage drop of 32 ... 34 volts and a nominal current of 600 and 900 mA, respectively), the nominal input voltage range is from 10 to 24 volts (for example, from on-board network of the car, or industrial power supplies with an output voltage of +12 volts). For boards with an output current of 1200 or 1500 milliamps (40 or 50 watts) - from 20 to 30 volts (24 volts nominal). In addition to single high-power LEDs, the driver allows you to supply serial strings of LEDs of lower power. For example, a modification for a current of 700 mA can be used to power 10 ... 12 series-connected 3-watt LEDs with a nominal forward voltage drop of 3.5 ... 3.8 volts. Or to power 3 series-connected 10-watt LEDs with a nominal drop of 10 ... 10.5 volts at a current of 900mA.
Dimensions of the driver board - 50 x 24 mm.
Board equipped with protection against polarity reversal of the input power, as well as protection against overvoltage at the output in case of breakage (failure) of the load, limiting the output voltage to 38 ... 47 volts, depending on the ordered modification. The board is equipped with an input for dimming by applying a PWM (pulse-width modulated) signal to the DIM input from an open collector output with a frequency of 100 Hz to 1 kHz.
The boards are schematically identical except for the ratings of the current sensor and the power choke in the converter.
Closing the load outputs is unacceptable, as it leads to the failure of the device.
One or more LEDs can be connected to the output in series, with a rated current equal to the rated current of a specific driver modification and direct voltage drop no more than 42 ... 45 volts.
It is also permissible to connect LEDs with a higher rated current, but you must be aware that they will not be used at full power.
For example: one 20-watt LED (for 600 mA current and 32 .. .34 volts), or 10 ... 12 LEDs with a power of 3 watts (for a current of 750 mA and a voltage of 3.4 volts), or 3 ... 4 LEDs with a power of 10 watts (for a current of 0.95 ... 1.05 amperes and voltage 9.5 ... 10.5 volts). It must be understood that in the last two cases the power in the load will be less than the sum of the rated powers of the connected LEDs, since they will be supplied with a current less than the rated one. Moreover, the power will decrease not in proportion to the decrease in the current, but somewhat more, since with a decrease in the current, the direct voltage drop across the LEDs also decreases.
The DIM input can be used to disable the driver: when connected to the minus of the input power, the driver is disabled, and the output voltage becomes equal to the input minus 0.4 ... 0.6 volts. As a result, the current stops flowing to the load and the power consumption from the input source drops to several milliwatts.
The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
