UC2909N

Overview

The UC2909N is a switchmode lead-acid battery charger controller manufactured by Texas Instruments. It operates within a supply voltage range up to 40 V and delivers an output current of 2 A with a maximum output voltage of 20 V. The component is housed in a PDIP-20 package designed for through-hole mounting. It supports operation across a temperature range from -40 °C to +85 °C, ensuring reliability in various environmental conditions.

Feature Summary

• Integrated control logic for switchmode charging profiles specific to lead-acid batteries
• Built-in protection mechanisms for thermal management and fault detection
• Supports high-current output stages suitable for direct battery charging applications

Applications

• Lead-acid battery charging systems
• Uninterruptible power supply (UPS) maintenance chargers
• Solar-powered battery storage charge controllers

Procurement Notes

Verify the exact ordering suffix against the manufacturer's latest datasheet to ensure correct package type and temperature grade. Confirm RoHS compliance status and availability as product lifecycles may change. Cross-reference the part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when designing dedicated lead-acid battery chargers requiring integrated control features. Ensure the external circuitry supports the required 2 A output capability and 40 V input limits. Consider thermal dissipation requirements given the through-hole packaging and operating temperature range.

Part Context

The UC2909 belongs to the UC series of specialized power management ICs focused on battery management. It complements other family members like the UC2901 and UC3906 by providing complete charging control solutions. This part integrates essential functions into a single controller to simplify system design.

Replacement Considerations

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