UC2909DWTR

Overview

The UC2909DWTR is a switch-mode lead-acid battery charger integrated circuit manufactured by Texas Instruments. It operates with a maximum supply voltage of 40 V and delivers an output current of 2 A, supporting a maximum output voltage of 20 V. The device is housed in a 20-pin SOIC package designed for surface-mount technology. It functions within an ambient temperature range of -40°C to +85°C. This component belongs to the UC2909 series and is supplied in tape-and-reel packaging.

Feature Summary

• Implements switch-mode charging architecture for lead-acid batteries
• Integrates programmable charge current control
• Includes built-in fault protection mechanisms

Applications

• Lead-acid battery charging systems
• Power management circuits requiring sealed lead-acid support
• Industrial battery maintenance units

Procurement Notes

Verify the specific suffix 'DWTR' confirms the tape-and-reel packaging format and industrial temperature grade. Confirm RoHS compliance status through the official datasheet. Ensure the source document explicitly lists this part number as active or end-of-life to determine availability constraints.

Selection Notes

Select this component when designing for lead-acid chemistries requiring switch-mode efficiency. The 2 A output capability suits moderate capacity battery banks. Verify that the 40 V supply limit and 20 V output ceiling align with the target battery string voltage requirements.

Part Context

This part is a member of the UC2909 family of battery chargers. It shares functional similarities with other Texas Instruments lead-acid controllers but differs in package type and thermal characteristics compared to through-hole variants like the UC2909NG4.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.