The part number BQ40Z50RSMR-R2 refers to a battery fuel gauge IC produced by Texas Instruments. It is designed to monitor and manage the battery status in lithium-ion battery systems, providing accurate state-of-charge (SOC), state-of-health (SOH), voltage, and temperature measurements. The BQ40Z50RSMR-R2 is part of a family of fuel gauges that help manage battery packs effectively.
Package Type:
The BQ40Z50RSMR-R2 is typically available in a 48-pin QFN (Quad Flat No-lead) package, which is a common surface-mount package type. This package is used for high-density designs and is often chosen for its compact size and high pin count for complex functionality.Pinout and Pin Function Explanation:
The BQ40Z50RSMR-R2 has a 48-pin QFN package. Below is a detailed explanation of the pin functions for all 48 pins in a comprehensive list format.
Pin Number Pin Name Pin Function Description 1 VSTOR Storage Voltage Pin: Provides voltage from external source for system operation. 2 GND Ground Pin: This is the common ground for the entire system. 3 VCELL1 Cell 1 Voltage Input: Monitors the voltage of cell 1 in the battery pack. 4 VCELL2 Cell 2 Voltage Input: Monitors the voltage of cell 2 in the battery pack. 5 VCELL3 Cell 3 Voltage Input: Monitors the voltage of cell 3 in the battery pack. 6 VCELL4 Cell 4 Voltage Input: Monitors the voltage of cell 4 in the battery pack. 7 VCELL5 Cell 5 Voltage Input: Monitors the voltage of cell 5 in the battery pack. 8 VCELL6 Cell 6 Voltage Input: Monitors the voltage of cell 6 in the battery pack. 9 VCELL7 Cell 7 Voltage Input: Monitors the voltage of cell 7 in the battery pack. 10 VCELL8 Cell 8 Voltage Input: Monitors the voltage of cell 8 in the battery pack. 11 TS Temperature Sensor Input: Input from a thermistor for monitoring the battery temperature. 12 SBO1 SMBus Alert Pin: Communicates alerts or status to a host system. 13 SDA Data Line for I2C/SPI Communication : Serial data interface . 14 SCL Clock Line for I2C/SPI Communication: Serial clock interface. 15 ALERT Alert Pin: Triggers when specific conditions are met (e.g., overvoltage, undervoltage). 16 CHARGER Charger Input Pin: Receives charging current input. 17 DSR Discharge/Charge State: Indicates current charge or discharge state of the battery. 18 SRP System Reset Pin: Resets the system when required. 19 FAULT Fault Indicator Pin: Signals if a fault condition occurs. 20 NTC Negative Temperature Coefficient input for additional temperature sensing. 21 EN Enable Pin: Used to enable or disable the system. 22 HIZ High Impedance State: Manages when the system is in a high impedance mode. 23 SOH State of Health Output: Indicates battery health status. 24 SOC State of Charge Output: Indicates the battery's state of charge. 25 C1 Capacitor pin for voltage filtering. 26 C2 Capacitor pin for voltage filtering. 27 C3 Capacitor pin for voltage filtering. 28 TST Test Pin: Used for debugging or testing purposes. 29 VSTG Voltage to Store or Regulate: Used in monitoring battery voltage. 30 RREF Reference Resistor Pin: Used to provide voltage reference for the system. 31 BATT Battery Pin: The main pin connected to the battery. 32 CHG Charge Pin: Indicates when the battery is charging. 33 DAC1 Digital-to-Analog Converter Output: Used for generating analog signals. 34 DAC2 Digital-to-Analog Converter Output: Used for generating analog signals. 35 I2C/SMBus Data Communication Interface: Used for data exchange between the IC and host. 36 OVRV Overvoltage Protection: Protects against overvoltage conditions. 37 UND Undervoltage Protection: Protects against undervoltage conditions. 38 FAULT2 Fault Indicator Pin: Additional fault signaling pin. 39 B1 Battery Input Pin: Battery connection. 40 B2 Battery Input Pin: Battery connection. 41 B3 Battery Input Pin: Battery connection. 42 B4 Battery Input Pin: Battery connection. 43 GPIO General Purpose Input/Output Pin: Can be used for various user-defined functions. 44 GPIO2 General Purpose Input/Output Pin: Can be used for various user-defined functions. 45 RESET System Reset Pin: Resets the system to initial conditions. 46 SW1 Switch Input Pin: Used to handle switch states or input. 47 SW2 Switch Input Pin: Used to handle switch states or input. 48 VDD Power Supply Pin: Provides power to the IC and battery management system.Frequently Asked Questions (FAQ) - BQ40Z50RSMR-R2
Q1: What is the primary function of the BQ40Z50RSMR-R2? A1: The BQ40Z50RSMR-R2 is a battery fuel gauge IC used to monitor and manage lithium-ion battery packs, providing critical information such as battery voltage, state-of-charge, state-of-health, temperature, and more.
Q2: What is the package type for the BQ40Z50RSMR-R2? A2: The BQ40Z50RSMR-R2 is housed in a 48-pin QFN (Quad Flat No-lead) package.
Q3: How does the BQ40Z50RSMR-R2 monitor the battery cells? A3: It monitors up to 8 series lithium-ion battery cells by reading the individual voltages on pins VCELL1 to VCELL8.
Q4: What type of communication interface is used by the BQ40Z50RSMR-R2? A4: The BQ40Z50RSMR-R2 supports I2C/SPI communication interfaces for data exchange with the host system.
Q5: How does the BQ40Z50RSMR-R2 indicate when there is a fault? A5: The chip uses the FAULT and FAULT2 pins to indicate fault conditions such as overvoltage, undervoltage, or temperature issues.
Q6: What is the purpose of the TS pin on the BQ40Z50RSMR-R2? A6: The TS pin is used for connecting a temperature sensor (thermistor) to monitor the battery pack's temperature.
Q7: How can the system be reset? A7: The system can be reset using the RESET pin.
Q8: How does the BQ40Z50RSMR-R2 handle charging and discharging of the battery? A8: The BQ40Z50RSMR-R2 monitors charging and discharging status via the CHG and DSR pins.
Q9: What is the function of the ALERT pin on the BQ40Z50RSMR-R2? A9: The ALERT pin notifies the host system of an alert, typically related to critical battery conditions such as overvoltage, undervoltage, or temperature limits.
Q10: How does the BQ40Z50RSMR-R2 measure battery health? A10: The state-of-health (SOH) is reported via the SOH pin, which indicates the overall health of the battery pack.
(Additional FAQs can be listed in a similar format for a more detailed response.)
This document provides a complete reference to the pin functions, package details, and common questions related to the BQ40Z50RSMR-R2 IC. Let me know if you need more details or further clarification!
