Overview
The BQ2000SN-B5TRG4, produced by Texas Instruments, is a programmable, monolithic IC designed for the fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) battery packs. This IC is particularly useful in single- or multi-chemistry applications, ensuring safe and efficient charging processes. It automatically selects the proper battery chemistry and applies the optimal charging and termination algorithms, thereby preventing undercharged or overcharged conditions.
The BQ2000SN-B5TRG4 integrates various features such as peak voltage detection, minimum charge current, maximum temperature, and maximum charge time to ensure accurate and safe termination of the fast charge cycle. It also includes pre-charge qualification, trickle-charge mode, and built-in battery removal and insertion detection, making it a comprehensive solution for battery charging needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -20 to 70 | °C |
| Supply Voltage | 4 to 6 | V |
| Supply Current (Exclusive of External Loads) | 0.5 to 1 | mA |
| Sleep Current | 5 | µA |
| Battery Input Impedance | 10 | MΩ |
| TS Input Impedance | 10 | MΩ |
| SNS Input Impedance | 10 | MΩ |
Key Features
- Safe Management of Fast Charge: For NiCd, NiMH, or Li-Ion battery packs.
- High-Frequency Switching Controller: For efficient and simple charger design.
- Pre-Charge Qualification: Detects shorted, damaged, or overheated cells.
- Charge Termination Criteria: Peak voltage (PVD) for nickel chemistries, minimum charge current for Li-Ion, maximum temperature, and maximum charge time.
- Selectable Top-Off Mode: Achieves maximum capacity in NiMH batteries.
- Programmable Trickle-Charge Mode: For reviving deeply discharged batteries and postcharge maintenance.
- Built-in Battery Removal and Insertion Detection: Enhances user convenience and safety.
- Sleep Mode: For low power consumption.
- Integrated High-Speed Comparator: Allows for a complete, high-efficiency battery charger circuit.
Applications
- Multi-Chemistry Charger: Supports NiCd, NiMH, and Li-Ion batteries.
- Nickel Charger: Specifically designed for NiCd and NiMH batteries.
- High-Power, Multi-Cell Charger: Suitable for high-power and multi-cell battery applications.
Q & A
- What types of batteries does the BQ2000SN-B5TRG4 support?
The BQ2000SN-B5TRG4 supports nickel cadmium (NiCd), nickel metal-hydride (NiMH), and lithium-ion (Li-Ion) battery packs.
- What are the charge termination criteria for the BQ2000SN-B5TRG4?
The charge termination criteria include peak voltage (PVD) for nickel chemistries, minimum charge current for Li-Ion, maximum temperature, and maximum charge time.
- Does the BQ2000SN-B5TRG4 have a trickle-charge mode?
- How does the BQ2000SN-B5TRG4 detect battery removal and insertion?
The BQ2000SN-B5TRG4 has built-in battery removal and insertion detection.
- What is the operating temperature range of the BQ2000SN-B5TRG4?
The operating temperature range is -20 to 70°C.
- What is the supply voltage range for the BQ2000SN-B5TRG4?
The supply voltage range is 4 to 6 V.
- Does the BQ2000SN-B5TRG4 have a sleep mode?
- What is the purpose of the integrated high-speed comparator in the BQ2000SN-B5TRG4?
The integrated high-speed comparator allows the BQ2000SN-B5TRG4 to be the basis for a complete, high-efficiency battery charger circuit.
- How does the BQ2000SN-B5TRG4 manage pre-charge qualification?
The BQ2000SN-B5TRG4 detects shorted, damaged, or overheated cells during pre-charge qualification.
- Can the BQ2000SN-B5TRG4 be used in high-power, multi-cell applications?
