BQ2003S-NG4

Overview

The BQ2003S-NG4 is a switch-mode nickel-cadmium and nickel-metal hydride battery charger IC from Texas Instruments. It integrates closed-loop current control circuitry for fast-charge and conditioning applications. The device supports hysteretic PWM switch-mode current regulation or gated conduction modes. It features negative delta-V and dT/dt termination functions to ensure safe charging cycles. The component operates within a supply voltage range up to 5.5V and is designed for surface-mount assembly in an SOIC package.

Feature Summary

• Integrates closed-loop current control circuitry for cost-effective standalone and system-integrated solutions
• Supports fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
• Provides hysteretic PWM switch-mode current regulation or gated conduction modes
• Includes negative delta-V and dT/dt termination functions

Applications

• Fast-charge management for nickel-cadmium batteries
• Conditioning circuits for nickel-metal hydride batteries
• Standalone battery charger systems
• System-integrated power management modules

Procurement Notes

Verify the specific suffix NG4 against the manufacturer's official documentation to confirm RoHS compliance and lead-free status. Ensure the SOIC package variant matches your PCB footprint requirements. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs. Confirm operating temperature ratings align with your environmental specifications before finalizing procurement orders.

Selection Notes

Select this component when designing chargers for NiCd or NiMH chemistries requiring precise current regulation. The integrated hysteretic PWM control reduces external component count compared to linear alternatives. Consider the 5.5V maximum supply limit when choosing input power sources. Evaluate the thermal performance within the specified 0°C to 70°C ambient range for your enclosure design.

Part Context

This part belongs to Texas Instruments' battery management portfolio, specifically targeting rechargeable battery charging applications. It serves as a monolithic CMOS solution combining control logic with high-speed switching power-control circuitry. The BQ2003 series provides a compact alternative to discrete charging implementations, simplifying board layout for portable electronic devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence carefully if considering alternative manufacturers. Check pin-to-pin compatibility and electrical parameter overlaps before substituting.