How to Build an XR1151 IC Power Bank | XR1151 IC Circuit Diagram

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XR1151 IC is a dc to dc step up voltage booster ic (integrated circuit). It is generally used in torches, small circuits where less amperes are required, power banks etc. We will make a power bank with this ic which will step up 3v and boost it to 5v dc, its output ampere is not that high, like a it gives output upto 500mA. There might be a little delay in charging the phone due to its low ampere. This is a SMD type 6 pin ic, soldering in it is a little difficult, so first make the tip of the soldering iron a little thin from the. We have shared two circuit diagrams. You can use 15k resistor in place of 20k resistor, but try to use 20k resistor only. You can use 100k resistor in place of 150k resistor. Two capacitors are used in this circuit, 22uf and 10uf. The voltage value of both is same, 16v or more, but use 47uf or 100uf in place of 22uf and 22uf or 47uf, upto 100uf in place of 10uf. See Making Process Guide to complete this circuit.This circuit also works like a voltage booster with the only difference being that the voltage booster made from XR1151 ic has feedback feature and it provides fixed 5v dc output. (Make voltage booster). The output voltage of both simple and advanced remains the same, just to make the advanced circuit, a few more components will be required like: 5v dc female usb jack (5c dc mobile charging usb jack) and a switch. front. To make this we will need some components.

Required Components

Qty	Name
1	XR1151 IC
1	Schottky diode or 1N4007 diode
1	20k resistor
1	150k resistor
1	10uF 16V capacitor
1	22uF 16V capacitor
1	3.3uH inductor
1	3.7V battery

Making Process Guide

1. First of all we have to paste the IC on a cardboard or PCB board. Then we have to connect pins 4, 5 and 6 of the XR1151 IC together.

2. Now take a 1n4007 diode and connect its anode to pin 1 of the IC. Connect the first pin of the 3.3uH inductor to pin 1 of the IC. Then connect the second pin of the 3.3uH inductor to pin 6 of the IC. Now connect the cathode of that diode to the positive pin of the 22uF 16V capacitor.

3. Now connect pin 2 of the IC to the negative pin of both the 22uF 16V and 10uF 16V capacitors. Then connect the positive pin of the 10uF 16V capacitor to pin 6 of the IC.

4. Connect the first pin of the 20k resistor to pin 3 of the IC. Connect the second pin of the 20k resistor to pin 2 of the IC. Then connect the first pin of the 150k resistor to the positive pin of the 22uF 16V capacitor. Connect the second pin of the 150k resistor to pin 3 of the IC.

5. Connect the positive terminal of the 3.7V battery to pin 6 of the IC. Connect negative terminal of battery to pin 2 of the IC.

6. The positive output pin of this circuit is the positive pin of the 22uF 16V capacitor. And the negative output pin of the circuit is the negative pin of the 22uF 16V capacitor.

Final Steps and Usage

• Make sure the 3.7V battery is properly connected to the input.
• This circuit will provide 5V dc output, which is suitable for charging mobile phones and other small devices.
• Refer to the given circuit diagrams to ensure the connections.

Circuit Diagram 

Circuit Diagram 1

Advance circuit diagram 

The advantage of making the advanced circuit is that the battery connected in it can also be charged from the 5v usb jack in the same circuit, you do not need to remove the battery and charge it again and again, we can charge the battery directly with this circuit and when the battery is charged, we can use the power bank

Circuit Diagram 2

Important Tips

Double check the connections to avoid short circuit. Make sure no wire is broken or the IC is not installed in wrong way.

Do not connect its output wires with each other otherwise the IC may get damaged. It does not have auto cut feature so use it carefully.

If you face any problem, leave a comment for further help.

Working Principle 

When 3 volts are given to the circuit, then XR1151 works like a switch, it turns ON and OFF rapidly, and it remains connected to the inductor and gives voltage to the inductor, the voltage is stored in the inductor for some time and then the voltage comes out of the inductor and is stored in the capacitor, and this whole process happens continuously and we get more voltage at the output, but if this voltage goes directly to any of your devices, then your device will get damaged, that is, switching is happening continuously and voltage is also coming out of the inductor and is stored on the capacitor, so the capacitor is not so smart that it can store only 5 volts, voltage keeps getting stored in the capacitor continuously and when the load is connected, that is, any of your devices is connected to this circuit, then all its voltage comes out immediately and goes to that device and it can be 50 volts or 12v or 20v. In such a situation, when a phone is connected which is charged at 5 volts or Connecting any other 5 volt or 6 volt device to it can cause huge damage. To avoid this, an inbuilt load is connected to it which boosts 3 volts and keeps it fixed at 5 volts. This IC also has the facility of feedback which monitors the output voltage.

Circuit & IC Specifications

Input Voltage Range	2.2V to 6V
Output Voltage	1.6V to 6V
Output Current	500mA to 1A max
Package	SOT-23-6
Circuit type	dc to dc converter
Input Current	2A max
Price	₹50 to ₹100 max
Total pin	6 pin ic
External Components	7 to 9
Applications	Emergency Torch light, Power Bank

XR1151 Power Bank Circuit Video tutorial

XR1151 IC Applications and Features

Applications

• White LED Driver Supply: Efficiently drives white LEDs, providing the necessary voltage and current.
• Local 3.3V or 5V Supply: Can be used to supply local power to circuits requiring 3.3V or 5V.
• Battery Back-up: Ideal for battery back-up systems, ensuring stable power supply during primary power loss.

Features

• Internal 2A MOSFET Switch: Integrated high-current switch capable of delivering up to 2A.
• 1.2MHz Switching Frequency: High switching frequency allows the use of smaller external components.
• Integrated Soft-Start: Smooth startup to prevent inrush current, protecting the components.
• Low 1.6V Vin Operation: Operates efficiently with input voltages as low as 1.6V.
• Low Rds(on) Switch: 100mΩ at 5V output, ensuring minimal power loss.
• Delivers 5V at 800mA from a 3.3V input: Efficiently boosts 3.3V input to 5V output.
• Delivers 3V at 800mA from a 2.5V input: Efficiently boosts 2.5V input to 3V output.
• Uses Small, Low Profile External Components: Facilitates compact and space-saving designs.
• Low Profile (1mm) SOT-23 Package: Compact packaging suitable for space-constrained applications.

People also ask

Can I use other types of capacitors and resistors?

While you can use components with similar values, it's recommended to use the specified components to ensure optimal performance and stability.

How can I ensure the safety of my power bank circuit?

Always use quality components, double-check all connections, and avoid operating the circuit in damp or high-temperature environments. Additionally, ensure that the battery is properly insulated and secured.

What should I do if my power bank circuit is not providing the correct output voltage?

Recheck all connections and component values. Ensure that the battery is fully charged and functioning correctly. If the problem persists, consider replacing the IC or other components to diagnose the issue.