Thursday, February 11, 2016

Circuit Schematic Solar Powered Cell Phone Charger using Reg113-5 Voltage Regulator

Eltronicschool. - This is circuit schematic Solar Powered Cell Phone Charger using Reg113-5 Voltage Regulator like in Figure 1 below. Beside using Reg113-5 Voltage Regulator in this circuit schematic also using additional components like capacitors and diode. And the main component material that used is solar panel 6V, 170mA like in Figure 2 below. You also can read: Circuit Schematic 12V LDO Solar Charge Controller using MOSFET)

Circuit schematic

Component Parts
  1. Diode D1 = 5819
  2. Capacitors C1=C2=4.7uF
  3. IC REG113-5

Circuit schematic like in Figure 1 above is Circuit Schematic Solar Powered Cell Phone Charger using Reg113-5 Voltage Regulator. According dicovercircuits site that published this circuit describe that this is the simple circuit below regulates the voltage from a 6v solar panel to a fixed +5v.  That voltage can be fed to any cell phone or USB connected portable device, to charge its battery.  The circuit uses a Reg113-5 voltage regulator from Texas Instruments. The tiny device can handle up to 400ma of charging current.  I would suggest using a solar panel rated for less than 2 watts and one which contains 12 solar cells.

Figure 2. 6v 170ma Solar Panel
(Source: Screenshot of Discovercircuits)
The main active component in this circuit is Reg113-5 Voltage RegulatorThe REG113 is a family of low-noise, low-dropout linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 250mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional lowdropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 850µA (at IOUT = 400mA) and drops to 10nA when not enabled. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions.

The REG113 has very low output noise (typically 28µVrms for V OUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The REG113 is well protected—internal circuitry provides a current limit which protects the load from damage, furthermore, thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG113 is available in SOT23-5 and MSOP-8 packages.

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