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The operating voltage of this particular circuit is 9 to 12 volts. There is a chart given above from which you can select the resistor (Rx) according to the LED you’ll use. When the voltage is applied to this circuit the IC’s output voltage and current can be altered and the desired current for turning the LED on is produced. Applications and Uses. An LED typically needs about 15mA. With the NPN transistor in the circuit, amplification is usually to the degree of about to Therefore, the current will be amplified by , which is mA * = 50mA. 50mA is now sufficient to drive and light the LED. So you see how the transistor allows a circuit to be an LED driver. You need an LED driver that will function at say V DC and output your required current (mA) at greater than 30V, say 35V. BTW: If your 9V battery is your typical transistor radio battery, do not expect it to last long.
27 thg 8, We were recently contacted by a customer, who has been using MEAN WELL LED drivers for years without experiencing any problems. Find here LED Bulb Driver, Light Emitting Diode Bulb Driver manufacturers, suppliers exporters in India. 9w Led Bulb Ic Driver ₹ 19/Piece. Get Quote. 29 thg 1, becomes most obvious in tunable white and multichannel drivers. Intended audience. LED driver design engineers, field application engineers.
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