Wednesday, August 26, 2015

Circuit Diagram 5V Power Bank with 3.7V Input using MC34063 DC to DC Converter

Robotronicdiagram. - Here is circuit Circuit Diagram 5V Power Bank with 3.7V Input using MC34063 DC to DC Converter like in Figure 1 below. The main component in this DC to DC converter is MC34063 IC. With this circuit schematic we can charge easily our microcontroller using 3.7V battery. In here we will show you also the component part ans simple description of this circuit diagram. 

Circuit Diagram 

Component Part
  1. MC34063A IC
  2. Resistors
  3. Capacitors
  4. Inductor L1 = 100uH
  5. Zener diode IN5819

Circuit diagram like in figure 1 above is Circuit Diagram 5V Power Bank with 3.7V Input using MC34063 DC to DC Converter. According Electroschematics site describe that mentioned idea seems good for any 3.3V microcontrollers, but if you want to operate some 5V devices within the 3.3V circuit (or you are using a 5V microcontroller), powering the system from the 3.7V lithium-ion battery pack demands a suitable dc-dc voltage booster circuit to convert the existing 3.3V to 5V dc level. Described here is an economical yet efficient solution for this problem. The circuit in picture is nothing but an ultra-simple boost converter realized using the popular 8-pin chip MC34063A.

The MC34063 is a monolithic control circuit containing the primary functions required for DC to DC converters, consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC was specifically designed to be incorporated in Step-Down (buck) and Step-Up (boost) voltage converting applications with a minimum number of external components. MC34063 is quite flexible, but picking the right component values can be tricky, especially if the output current can vary across a wide range. However, we want a cheap switching regulator for a circuit draws roughly a fixed amount of current well below 100mA, the MC34063 is a great choice to consider here. Author’s prototype was tested with a 100µH/1A inductor (L1), and 1% tolerance resistors as R3-R4.

Please read more this article from original source about Circuit Diagram 5V Power Bank with 3.7V Input using MC34063 DC to DC Converter using link Here.

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