How to Use IP5306: Examples, Pinouts, and Specs

The IP5306 is a highly integrated power management IC developed by Injoinic Technology Co., Ltd. It is specifically designed for lithium-ion battery charging and protection. This versatile component combines a battery charger, a load switch, and a battery protection circuit into a single package, making it ideal for portable electronic devices.

• Power banks
• Portable speakers
• Wearable devices
• IoT devices
• Handheld gadgets

The IP5306 simplifies the design of battery-powered systems by providing efficient charging, overcurrent protection, and seamless power delivery.

The IP5306 is available in an ESOP-8 package. Below is the pinout and description:

1. Power Input: Connect the VIN pin to a 5V power source, such as a USB port or DC adapter.
2. Battery Connection: Attach the positive terminal of the lithium-ion battery to the BAT pin and the negative terminal to GND.
3. Output Connection: Connect the load to the VOUT pin. Ensure the load does not exceed the maximum output current of 2.1A.
4. Inductor Selection: Use an appropriate inductor (e.g., 2.2µH to 4.7µH) for the boost converter. Connect it between the SW pin and VOUT.
5. Enable Control: Use the EN pin to enable or disable the boost converter. Pull the pin high to enable and low to disable.
6. Status Monitoring: Use the STAT pin to monitor the charging status or detect faults.

• Thermal Management: Ensure proper heat dissipation by using a PCB with adequate thermal vias and copper planes.
• Input Voltage: Do not exceed the maximum input voltage of 6.0V to avoid damaging the IC.
• Battery Protection: The IP5306 includes built-in overcharge and overdischarge protection, but ensure the battery used is compatible with these features.
• Capacitor Selection: Use low-ESR capacitors (e.g., 10µF ceramic capacitors) at the input and output for stable operation.

The IP5306 can be used to power an Arduino UNO via its 5V output. Below is an example of how to monitor the charging status using the STAT pin:

// Arduino code to monitor the IP5306 charging status
const int statPin = 2; // Connect the STAT pin of IP5306 to Arduino pin 2

void setup() {
  pinMode(statPin, INPUT); // Set STAT pin as input
  Serial.begin(9600);      // Initialize serial communication
}

void loop() {
  int stat = digitalRead(statPin); // Read the STAT pin
  if (stat == HIGH) {
    Serial.println("Charging in progress or fault detected.");
  } else {
    Serial.println("Charging complete or no fault.");
  }
  delay(1000); // Wait for 1 second before checking again
}

1. Can the IP5306 charge multiple batteries in series?
   No, the IP5306 is designed for single-cell lithium-ion batteries only.

2. What happens if the input voltage exceeds 6.0V?
   Exceeding 6.0V can damage the IC. Always use a regulated power source within the specified range.

3. Can I use the IP5306 without a battery?
   Yes, but the output may not be stable under varying load conditions. A battery is recommended for optimal performance.

4. How do I know if the battery is fully charged?
   The STAT pin will indicate the charging status. When charging is complete, the pin will typically go low.

By following this documentation, users can effectively integrate the IP5306 into their designs for reliable power management.