The TS pin on devices like the BQ24090DGQR, a single-cell Li-Ion and Li-Pol battery charger IC from Texas Instruments, is typically used for temperature sensing. This pin allows the charger to monitor the temperature of the battery being charged to ensure it remains within safe operating conditions. It's commonly connected to a thermistor placed in close proximity to or in thermal contact with the battery. The thermistor's resistance varies with temperature, and the charger IC uses this information to regulate the charging current or voltage, or to suspend charging if the battery temperature goes outside of predetermined safe bounds.

This safety feature is critical in preventing over-temperature conditions which could lead to battery damage or failure, potentially resulting in safety hazards. Therefore, connecting the TS pin properly is crucial for the safe operation of the battery charging process.

To determine whether the reset/enable pins in your project need external pull-up or pull-down resistors, I'll need to identify which pins these are and the recommended configuration from the component documentation. Let's check the available pins and decide if any action is required:

Based on a typical application of the BQ24090DGQR, the following are relevant pins that could require pull-up or pull-down resistors:

Review the component's datasheet and your application requirements to confirm these assumptions and adjust accordingly. If you need further clarification on any specific pin usage, feel free to ask!

The pin labeled "TS" on a device like the BQ24090DGQR, which is a single-cell Li-Ion and Li-Polymer battery charger from Texas Instruments, is typically used for temperature sensing. Here's a more detailed look at its function:

This functionality is crucial in preventing thermal runaway and extending the battery's life by ensuring that charging only occurs within safe temperature ranges. Let me know if you need guidance on how to connect this or any other component within your project!

how can i connect this Pin

To connect the TS (temperature sensing) pin properly in your project, which involves the BQ24090DGQR Li-Ion and Li-Polymer battery charger, follow these steps. I'm going to assume you want to set up temperature monitoring for the battery charging process using a Negative Temperature Coefficient (NTC) thermistor, which is a common approach.

Here's a summary of the connections:

By properly connecting the TS pin, you enable the BQ24090DGQR to monitor the battery temperature during the charging process, preventing charging when the battery is outside the safe temperature range. This is a crucial safety feature that helps prevent battery damage and prolong its lifespan.

how must i connect this Pin if not used

If you choose not to use the temperature sensing (TS) function of the BQ24090DGQR, typically, for the TS pin to be considered inactive or to ensure it does not interfere with normal operation, you have a couple of common options, depending on the specific recommendations in the device datasheet. Since we are discussing in general terms without specific reference to the datasheet at the moment, I'll offer standard practices:

Given the above options, the preferable method for the BQ24090DGQR would be to:

Important: Always refer to the BQ24090DGQR datasheet or Texas Instruments' guidelines for handling unused pins, as improper handling could lead to unintended circuit behavior. The datasheet will provide the most accurate guidance tailored to ensuring the IC operates correctly even when certain functions, like temperature sensing, are not utilized.

Would you like assistance with any other aspects of your project?