The Adafruit BQ25185 6106 is a highly efficient, compact, and versatile power management IC designed for battery charging and regulation. Manufactured by Adafruit, this component is ideal for applications requiring precise battery management, such as wearable devices, IoT gadgets, and portable electronics. It supports single-cell Li-Ion and Li-Polymer batteries and integrates multiple features, including a linear charger, a regulated output, and battery protection.
The Adafruit BQ25185 6106 offers a range of features tailored for efficient battery management. Below are the key technical details:
Parameter | Value |
---|---|
Input Voltage Range | 3.6V to 6.6V |
Battery Charge Voltage | Configurable up to 4.2V |
Charge Current | Programmable up to 500mA |
Quiescent Current | 700nA (typical) |
Output Voltage (LDO Mode) | 1.8V to 3.3V (configurable) |
Battery Protection | Overvoltage, undervoltage, and short-circuit |
Package Type | 12-pin DFN |
The BQ25185 6106 features a 12-pin DFN package. Below is the pinout description:
Pin Number | Pin Name | Description |
---|---|---|
1 | PMID | Input/output for the power path |
2 | SYS | System output voltage |
3 | BAT | Battery connection |
4 | TS | Temperature sense input |
5 | ISET | Charge current programming |
6 | GND | Ground |
7 | ILIM | Input current limit programming |
8 | VIN | Input power supply |
9 | CE | Charge enable (active low) |
10 | STAT | Charge status indicator |
11 | EN_LDO | Enable pin for LDO output |
12 | LDO | Low-dropout regulator output |
The Adafruit BQ25185 6106 is straightforward to use in battery-powered circuits. Below are the steps and considerations for integrating it into your design.
The BQ25185 6106 can be interfaced with an Arduino UNO to monitor the charge status. Below is an example code snippet:
// Example code to monitor the charge status of the BQ25185 6106
// Connect the STAT pin of the BQ25185 to Arduino digital pin 2
const int statPin = 2; // STAT pin connected to digital pin 2
void setup() {
pinMode(statPin, INPUT); // Set STAT pin as input
Serial.begin(9600); // Initialize serial communication
}
void loop() {
int chargeStatus = digitalRead(statPin); // Read the STAT pin state
if (chargeStatus == LOW) {
// STAT pin LOW indicates charging is in progress
Serial.println("Battery is charging...");
} else {
// STAT pin HIGH indicates charging is complete or not active
Serial.println("Battery is not charging.");
}
delay(1000); // Wait for 1 second before checking again
}
Component Overheating
Battery Not Charging
LDO Output Not Enabled
Input Voltage Out of Range
Q: Can I use the BQ25185 6106 with a 3.3V input?
A: No, the minimum input voltage is 3.6V. Using a lower voltage may result in improper operation.
Q: How do I configure the charge termination current?
A: The charge termination current is set using the ISET pin. Refer to the datasheet for the appropriate resistor value.
Q: Is the BQ25185 6106 suitable for multi-cell batteries?
A: No, this component is designed for single-cell Li-Ion or Li-Polymer batteries only.
Q: Can I disable the charging function?
A: Yes, pull the CE pin high to disable charging.
By following this documentation, users can effectively integrate the Adafruit BQ25185 6106 into their projects and troubleshoot common issues.