BQ2003S-N

Overview

The BQ2003S-N is a switch-mode NiCd/NiMH battery charger IC from Texas Instruments. It features negative dV and dT/dt termination for precise charge control. The device integrates closed-loop current control circuitry, enabling cost-effective solutions for standalone or system-integrated applications. It supports fast-charge and conditioning of nickel-based batteries using hysteretic PWM switch-mode current regulation or gated conduction modes.

Feature Summary

• Supports fast-charge and conditioning for nickel cadmium or nickel-metal hydride batteries
• Integrates closed-loop current control circuitry for efficient power management
• Utilizes hysteretic PWM switch-mode current regulation or gated conduction modes
• Incorporates negative dV and dT/dt termination mechanisms

Applications

• Standalone battery charging systems
• System-integrated battery management solutions
• Portable devices requiring NiCd/NiMH battery support

Procurement Notes

Verify the specific suffix (e.g., -N) against the manufacturer's official datasheet to confirm package type and temperature range specifications. Ensure compatibility with existing PCB footprints for the SOIC (DW) package. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference ordering information directly with Texas Instruments documentation to avoid discrepancies in part identification.

Selection Notes

Select this component when designing chargers for NiCd or NiMH chemistries requiring switch-mode efficiency. The integrated current control simplifies design complexity compared to discrete solutions. Consider the hysteretic PWM operation for stable regulation without external compensation networks. Evaluate the negative dV and dT/dt termination requirements against the target battery profile to ensure optimal charge safety and accuracy.

Part Context

The BQ2003 series represents Texas Instruments' approach to efficient nickel-based battery charging. The BQ2003S-N specifically denotes the SOIC package variant. This family focuses on reducing component count through integration of control loops and termination logic, targeting both consumer electronics and industrial portable equipment markets.

Replacement Considerations

Consult Texas Instruments documentation for direct pin-compatible substitutes within the BQ2003 family. Verify functional equivalence regarding termination methods and current regulation topology before substitution.