BQ24072RGTR Detai LED explanation of pin function specifications and circuit principle instructions
The model "BQ24072RGTR" belongs to Texas Instruments (TI), specifically to their series of battery management ICs. The "BQ24072" is designed to manage the charging and protection of a single-cell lithium-ion or lithium-polymer battery in portable devices. Below is a detai LED explanation of the pin function specifications, circuit principle, and frequently asked questions (FAQs) regarding the BQ24072RGTR.
Package and Pin Function Overview:
The BQ24072RGTR comes in a QFN-20 (20-pin) package. Below is a detailed pin description for all the 20 pins.
Pin Description for BQ24072RGTR (QFN-20 Package): Pin Number Pin Name Pin Type Function Description 1 ISET Input This pin is used to set the charge current. An external resistor is used to configure the charging current according to the formula provided in the datasheet. 2 STAT1 Output This pin indicates the charging status through an LED or other indicator. It provides a signal that can show whether the battery is charging, fully charged, or faulted. 3 STAT2 Output This pin provides additional charge status information, often used for another LED or signaling device. 4 NTC Input This pin is connected to an external thermistor (NTC) to monitor the temperature of the battery for protection against over-temperature conditions. 5 GND Ground This pin is the ground reference for the entire device and should be connected to the system ground. 6 VSTOR Power Input This pin is connected to the battery pack or a voltage storage element. It provides the power to the battery and is responsible for charging the battery. 7 VOUT Power Output This pin supplies the output voltage to the system or load. It is the voltage after regulation and provides power to the connected system. 8 BAT Battery Input This pin is connected to the positive terminal of the battery pack. It monitors the battery voltage and helps the IC manage charging and discharging. 9 I2C SCL Input This is the I2C clock pin used to synchronize data communication between the BQ24072 and a microcontroller or other system. 10 I2C SDA Input/Output This is the I2C data pin used for data transfer to and from the BQ24072. It carries the information for control and status updates. 11 CE Input The chip enable pin that enables or disables the device. When pulled low, the chip is disabled, and no operations occur. 12 PGOOD Output This pin indicates the health of the power supply by providing a signal when the power rails are within acceptable limits. 13 ACDET Input The AC detection pin that monitors whether the AC adapter is connected and supplies power to the system. 14 SYS System Output This pin is connected to the system power rail. It provides a regulated voltage to the system. 15 CHGIN Input The input for the charging current that comes from the external adapter or USB port. 16 ACOK Output The AC OK pin provides an indication of the status of the AC power input. 17 INTVCC Power Output This pin provides a 5V reference voltage generated by the BQ24072 for powering the internal logic and circuits. 18 D+/D- Input/Output These are the data lines for USB communication, used in USB charging systems. 19 TERM Input Termination input that detects the presence of the battery pack and ensures proper connection. 20 SYS_RESET Output A reset pin that signals the microcontroller or system to reset when there are power-related issues, such as low battery or charger failure.FAQs for BQ24072RGTR:
What is the primary function of the BQ24072RGTR? The primary function of the BQ24072RGTR is to manage the charging and protection of a single-cell lithium-ion or lithium-polymer battery. What does the STAT1 pin do? The STAT1 pin provides the charging status, signaling whether the battery is charging, fully charged, or in fault condition. What is the purpose of the NTC pin? The NTC pin connects to a thermistor to monitor the temperature of the battery, ensuring protection against over-temperature situations. What is the I2C interface used for in the BQ24072? The I2C interface (SCL and SDA pins) is used for communication with a microcontroller or system to control and monitor charging parameters. What is the maximum output current of the BQ24072RGTR? The maximum output current depends on the set value of the external current-setting resistor. Typically, it supports up to 2A of charge current. What is the function of the PGOOD pin? The PGOOD pin indicates whether the power supply voltage is within the acceptable range. How is the charge current determined for the BQ24072RGTR? The charge current is set by an external resistor at the ISET pin, which configures the charging current. How do I monitor the battery voltage with the BQ24072? The battery voltage can be monitored through the BAT pin, which is connected directly to the battery pack. What is the role of the SYS pin? The SYS pin provides a regulated output voltage to the system or load.What happens when the ACOK pin goes low?
If the ACOK pin goes low, it indicates that the AC power input is not present or is out of range.Can the BQ24072 handle USB charging?
Yes, the BQ24072 supports USB charging, including communication via D+ and D- lines for USB charging protocols.What does the TERM pin do?
The TERM pin detects the presence of the battery pack and ensures that it is properly connected for charging.What is the function of the ISET pin?
The ISET pin is used to configure the charging current by selecting the appropriate external resistor.Is it possible to disable the BQ24072?
Yes, the device can be disabled by pulling the CE (chip enable) pin low.What is the maximum battery voltage supported by the BQ24072?
The BQ24072 supports a maximum battery voltage of up to 4.5V.How do I know if the charger is working properly?
The charging status can be monitored through the STAT1 and STAT2 pins, which show the charging and error conditions.How do I know when the battery is fully charged?
When the battery reaches full charge, the STAT1 and STAT2 pins will indicate that charging is complete (typically by changing LED color or signal state).What protection features are integrated into the BQ24072?
The BQ24072 has over-voltage, over-current, and thermal protection to prevent damage to the battery and system.What is the role of the SYS_RESET pin?
The SYS_RESET pin is used to signal a reset condition when there are issues such as low battery or charging errors.What external components are needed to use the BQ24072?
You will need an external thermistor (for NTC pin), resistors (for setting charge current), and possibly an external capacitor for stability.This explanation provides a complete overview of the BQ24072RGTR’s pin functions and frequently asked questions. If you need further details or have additional questions, feel free to ask!
