Overview
The BQ2014SN-D120, produced by Texas Instruments, is a Gas Gauge IC designed for battery-pack or in-system installation to maintain an accurate record of available battery charge. This IC is specifically tailored for use with NiCd and NiMH rechargeable batteries. It monitors the voltage drop across a sense resistor to determine charge and discharge activity and compensates for battery temperature and rate of charge or discharge. The BQ2014 supports battery capacity recalibration during a discharge cycle from full to empty and includes a charge control output for external Fast Charge ICs like the bq2004.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D) |
| Pins | 16 |
| Operating Temperature Range (°C) | 0 to 70 |
| Package Quantity | 2500 (LARGE T&R) |
| Standby Current | 120µA (typical) |
| Serial Communication | Single-wire serial communication port |
| LED Drivers | 5 LED drivers |
| RoHS Compliance | Compliant |
Key Features
- Conservative and repeatable measurement of available charge in rechargeable batteries
- Charge control output operates an external charge controller such as the bq2004 Fast Charge IC
- Designed for battery pack integration
- Display capacity via single-wire serial communication port or direct drive of LEDs
- Measurements compensated for current and temperature
- Self-discharge compensation using internal temperature sensor
- User-selectable end-of-discharge threshold
- Battery voltage, nominal available charge, temperature, etc. available over serial port
Applications
The BQ2014SN-D120 is suitable for various battery-powered applications, including portable electronics, power tools, and other devices that use NiCd or NiMH rechargeable batteries. It is particularly useful in systems where accurate battery charge monitoring and control are crucial.
Q & A
- What is the primary function of the BQ2014SN-D120?
The primary function of the BQ2014SN-D120 is to maintain an accurate record of available battery charge in NiCd and NiMH rechargeable batteries.
- What type of package does the BQ2014SN-D120 come in?
The BQ2014SN-D120 comes in a 16-pin narrow SOIC (D) package.
- What is the operating temperature range of the BQ2014SN-D120?
The operating temperature range is 0 to 70°C.
- How does the BQ2014SN-D120 compensate for battery temperature and charge/discharge rates?
The BQ2014SN-D120 compensates for battery temperature and charge/discharge rates using an internal temperature sensor and rate compensation algorithms.
- Can the BQ2014SN-D120 be used with other types of batteries?
The BQ2014SN-D120 is specifically designed for use with NiCd and NiMH rechargeable batteries.
- How does the BQ2014SN-D120 communicate with external devices?
The BQ2014SN-D120 supports a simple single-line bidirectional serial link to an external processor.
- What is the purpose of the charge control output in the BQ2014SN-D120?
The charge control output operates an external charge controller such as the bq2004 Fast Charge IC.
- How does the BQ2014SN-D120 handle self-discharge estimation?
The BQ2014SN-D120 estimates self-discharge based on an internal timer and temperature sensor.
- Is the BQ2014SN-D120 RoHS compliant?
Yes, the BQ2014SN-D120 is RoHS compliant.
- What is the typical standby current of the BQ2014SN-D120?
The typical standby current is 120µA.
- Can the BQ2014SN-D120 be used in new designs?
No, the BQ2014SN-D120 is not recommended for new designs (NRND).
