The BQ34Z100PWR-G1 is a part of the Texas Instruments (TI) family of integrated circuits. Specifically, this component is a Fuel Gauge IC that is designed for monitoring the charge status of lithium-ion and lithium-polymer batteries.
Here is a detailed breakdown of the specifications and functionalities for the BQ34Z100PWR-G1:
1. Package Information and Pinout
The BQ34Z100PWR-G1 comes in a 28-pin TSSOP (Thin Shrink Small Outline Package) package.
Total Number of Pins: 28 pins Package Type: TSSOP-28 Pinout: Detailed below2. Pin Function Table (Pinout)
Pin Number Pin Name Function Description 1 VSTOR Supply Voltage Pin – Connect to the battery pack for Power supply. 2 SCL I2C Serial Clock – Connect to I2C clock line. 3 SDA I2C Serial Data – Connect to I2C data line. 4 GND Ground Pin – Connect to system ground. 5 GPIO1 General-purpose I/O pin 1 – Configurable pin for various functions. 6 GPIO2 General-purpose I/O pin 2 – Configurable pin for various functions. 7 ALERT Alert Pin – Active low output when an alert condition is triggered (e.g., low voltage). 8 CHRG Charge Pin – Used to indicate charge status or control the charge process. 9 TS1 Temperature Sensor 1 – Input pin for a temperature sensor (e.g., thermistor). 10 TS2 Temperature Sensor 2 – Input pin for a second temperature sensor (optional). 11 FAULT Fault Pin – Indicates when there is a fault or error condition in the system. 12 VDD Supply Voltage Pin – Connect to the main supply voltage of the system. 13 PGOOD Power Good Pin – Indicates whether the power supply is within operational limits. 14 SDA (2nd) Second Serial Data – Used if needed for multi-master I2C configuration. 15 SCL (2nd) Second Serial Clock – Used if needed for multi-master I2C configuration. 16 RST Reset Pin – Active low, used to reset the IC. 17 VSS Ground Pin – Connect to system ground. 18 CELLS Battery Cell Input – Connection point for the individual battery cell. 19 VBAT Battery Voltage Input – Connect to the battery pack to monitor its voltage. 20 TEMPERATURE Temperature Input – Input for a temperature sensor or external thermistor. 21 PROG Programming Pin – Pin used for programming the internal parameters. 22 TST Test Pin – Used during factory testing for diagnostics. 23 RESET Reset Pin – Can be used to reset the device to its default settings. 24 LDO Low Dropout Regulator – Provides a stable output voltage for external components. 25 VSTBY Standby Supply Pin – Supplies power during the standby mode. 26 INT Interrupt Pin – Trigger an interrupt when a specific condition is met. 27 OUT Output Pin – Used for various output purposes, such as for interfacing with a host. 28 VOUT Output Voltage Pin – Provides the output voltage for the system.3. Frequently Asked Questions (FAQs)
Q1: What is the function of the SCL and SDA pins on the BQ34Z100PWR-G1? A1: The SCL and SDA pins are used for I2C communication. The SCL pin is the clock line, and the SDA pin is the data line for transmitting and receiving data between the fuel gauge and the host processor.
Q2: How do I connect the VSTOR pin? A2: The VSTOR pin should be connected to the battery pack's positive terminal to provide the required power to the IC.
Q3: What is the purpose of the GPIO1 and GPIO2 pins? A3: The GPIO1 and GPIO2 pins are general-purpose input/output pins. They can be configured for various functions, such as sensing external signals or controlling external components.
Q4: How is the ALERT pin used? A4: The ALERT pin is an active low output used to signal when an error or alert condition occurs, such as a low battery voltage.
Q5: Can I connect two temperature sensors to the BQ34Z100PWR-G1? A5: Yes, the device has TS1 and TS2 pins, allowing you to connect two temperature sensors for more accurate thermal monitoring.
Q6: What is the CHRG pin used for? A6: The CHRG pin indicates the charging status or can be used to control the charging process when interfacing with a charger.
Q7: What does the FAULT pin indicate? A7: The FAULT pin will go low when a fault condition is detected, such as a malfunction or error in the system.
Q8: How do I reset the BQ34Z100PWR-G1? A8: You can reset the BQ34Z100PWR-G1 by pulling the RST pin low. This will reset the device to its initial state.
Q9: What is the PGOOD pin used for? A9: The PGOOD pin indicates whether the power supply is within proper operating limits. If the supply voltage is correct, it will go high.
Q10: Is it necessary to connect the TEMPERATURE pin? A10: The TEMPERATURE pin is optional, but it is highly recommended to connect it to a temperature sensor to monitor the battery's thermal conditions.
Q11: What does the VDD pin supply? A11: The VDD pin supplies the main operating voltage for the system and should be connected to the system's primary power source.
Q12: Can I use the RESET pin to reset the IC? A12: Yes, the RESET pin can be pulled low to perform a hardware reset on the BQ34Z100PWR-G1.
Q13: What is the LDO pin used for? A13: The LDO pin provides a low dropout regulator output, used to power other external components with a stable voltage.
Q14: What is the VOUT pin used for? A14: The VOUT pin provides the output voltage that can be used to power other circuits or devices.
Q15: How is the VSTBY pin used in operation? A15: The VSTBY pin supplies power when the device is in standby mode. It is used to maintain basic functionality when the system is not active.
Q16: How do I connect the CELLS pin? A16: The CELLS pin is used to connect the battery pack's cell monitoring circuit for measuring individual cell voltages.
Q17: Can the OUT pin be used for communication? A17: Yes, the OUT pin can be used for communication purposes, including interfacing with external systems.
Q18: What is the role of the SDA (2nd) and SCL (2nd) pins? A18: The SDA (2nd) and SCL (2nd) pins are used in multi-master I2C configurations to facilitate additional communication channels.
Q19: What is the TST pin used for? A19: The TST pin is used during the factory testing phase to perform diagnostics and ensure the functionality of the device.
Q20: How do I use the PROG pin? A20: The PROG pin is used for programming the internal settings of the device, such as calibration values and configuration parameters.
This summary provides a detailed explanation of the BQ34Z100PWR-G1 pin functions and usage, with a clear and complete FAQ section. If you need further clarification on any specific pin function or the application of the device, feel free to ask!