Posts Tagged ‘12 volt converter’

3V to 12V Step-Up DC Converter by IC LT1073-12

My cousin want buy IC dc converter,I like IC from www.linear.com because good ic,low cost and easy to used.
He are want 3V to 12V DC converter or switching power supply(switching-regulator).
Here is a DC converter Input 3V to output 12V,for electronics circuit.
The important part of the circuit is IC LT1073-12 again.
12V OUTPUT
35mA AT
VBATTERY = 2V
Detail more, Please read in this image circuit.

Read More Source: http://www.linear.com/
Thank you.

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5VDC to +12V and -12V Isolated dual power supply

This is circuit Isolated dual power supply OR DC to DC Converter Circuit. Input Voltage 5V,Output Voltage +12V and -12V.

Detail:
diode should be fast recovery type, for less than 100mA use 1N4148. transformer, pri-20-20, sec-60-60, a SWG-AWG to suit the current you design for.

Any fast switching transistor would work, no regulation, use regulators like 78L12 if you want, circuit like multivibrator used for flashing LED lights.
Dell GX620 Power supply
Source:http://www.electronics-circuits.com/schematics/arc20050724.html
Thank you.

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12V to 16V DC/DC Converter with LM2577

The circuit is a boost step-up regulator based around an LM2577-ADJ voltage regulator chip and a few other discrete components. Resistors R1 and R2 set the regulated output voltage.

A switch inside the voltage regulator closes between pins 4 and 3, causing current to flow through the inductor to ground. When the switch is released a few microseconds later, a back-EMF ‘kick’ is produced by the inductor, resulting in a positive pulse with respect to the input voltage. This pulse charges the output capacitor via the schottky diode, which tends towards an equilibrium voltage.

The switch continues to oscillate, the diode preventing the switch from shorting the output capacitor during the ‘on’ phase. The output voltage is monitored via the voltage divider R1/R2, causing the duty cycle of the switch oscillator to be continuously regulated in order to maintain a constant output voltage under varying loads.
The output voltage defined by R1/R2, if you want to take a 12 volt to 15 volt dc booster is easily.

Source: http://www.mcrent.com/workbench/dcdc1216/

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