Free electronic circuit design and schematic diagram
This is a electronic ballast circuit using L6569. This circuit uses The L6569 because it can control a low voltage halogen lamp transformer or a symmetric half bridge inverter of a fluorescent lamp ballast directly. The prevention of cross conduction is done by Two 270mA buffers drive the inverter MOSFETs with a 1.25ms built-in dead time. This circuit need only […]
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A circuit that can drive three to four high power LEDs is shown on figure below. The ADP 1610 is an adjustable boost regulator. The voltage headroom and current for the LEDs is provided by this device. An average gain of 12 feedback network that servos the Rset voltage and the ADP1610 FB pin 1.2 V band gap reference voltage […]
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The MAX931 series has capability to produce high output source which is useful for driving LEDs. The circuit below shows an example of simple four-stage level detector. Vin=(R1R2)/R1 volts gives the full-scale threshold (all LEDs on). The other thresholds are at 1/4 full scale, 1/2 full scale, and 3/4 full scale. The current into the LEDs is limited by the […]
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This is a circuit of light ignition circuit. This circuit uses the LIC01 which is designed for high voltage pulse generation circuits. This circuit can be used in many application such as lamp flashing, metal halid lamp and high pressure sodium lamp. When this circuit is used in high surge current operation in rugged environmental conditions, the high performance planar […]
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We can use SSL3250A (an asynchronous boost photo flash dual LED driver) for mobile application. This device ensure a lot of implementation possibilities because it has wide input voltage range and the large maximum output current at a wide output voltage range. It has long battery life and low power strain because of it’s high efficiency and soft-start. This device […]
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This is a Light position controller circuit. Light position controller is a monolithic integrated circuit which is used in passenger cars. Potentiometer on the dashboard is used to define the light beam’s elevation of the head light of the car to a state by the car driver. Here is the circuit: This circuit has some features, they are Thermally protected, […]
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The TPS61160/1 is a boost converter that drives up to 10 LEDs in series with a 40-V rated integrated switch FET. To reduce output ripple, improve convertion efficiency, and allows for the use of small external component, the boost converter is very usefull. The default white LED current is set with the external sensor resistor Rset, and the feedback voltage […]
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