BQ2003SG4

Battery Chargers Overview

The BQ2003SG4 is a switch-mode battery charger controller designed for nickel-cadmium (NiCd) and nickel-metal hydride (NiMH) batteries. It integrates hysteretic PWM current regulation and negative delta-voltage (dV) plus temperature rate-of-change (dT/dt) termination logic. The device operates from a 5.0 V supply with ±10% tolerance and utilizes a push-pull output to drive an external discharge transistor. Packaged in a 16-pin SOIC format, it supports fast-charge and conditioning cycles while maintaining precise control over charging parameters.

Battery Chargers Feature Summary

• Supports fast charge and conditioning for NiCd and NiMH battery chemistries
• Integrates hysteretic PWM switch-mode current regulation
• Provides negative dV and dT/dt termination detection
• Includes push-pull output for pre-charge battery discharge

Battery Chargers Applications

• Portable electronic devices requiring NiCd or NiMH power sources
• Battery management systems utilizing switch-mode charging topologies
• Equipment requiring automated battery discharge prior to charging

Battery Chargers Procurement Notes

Verify the specific suffix 'G4' confirms RoHS compliance and lead-free status as per Texas Instruments documentation. Ensure the 16-SOIC package variant matches your PCB footprint requirements. Confirm that the 5.0 V supply input specification aligns with your system's voltage rails before procurement.

Battery Chargers Selection Notes

Select this component when designing switch-mode chargers for nickel-based batteries requiring integrated termination logic. It is suitable for applications needing hysteretic PWM regulation rather than linear control. Consider the external transistor requirement for the discharge function and ensure the SOIC package fits the thermal and spatial constraints of the design.

Battery Chargers Part Context

This part belongs to the BQ2003 series of battery chargers. It is specifically engineered for nickel-cadmium and nickel-metal hydride technologies, distinguishing it from lithium-ion controllers. The SG4 designation indicates a specific package and compliance configuration within the broader TI battery management portfolio.

Battery Chargers Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pinout compatibility and electrical specifications against potential replacements to ensure functional equivalence in switch-mode nickel battery charging applications.