L9959U-TR-D

Full Half-Bridge (H Bridge) Drivers Overview

The L9959U-TR-D is a power management integrated circuit manufactured by STMicroelectronics, designed for automotive applications. It integrates four voltage regulators and two protected high-side drivers (HSDs). The device features a very low stand-by current and includes monitoring circuits for battery voltage detection. Key electrical characteristics include an 8.5V output at 200mA, selectable 8V or 10V outputs at 1000mA, a permanent 3.3V standby regulator at 100mA, and a switchable 3.3V regulator at 800mA. The package type is PowerSSO-24.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Integrates four independent voltage regulators with distinct current capabilities for various system loads.
• Includes two protected high-side drivers capable of handling loss of ground and loss of battery conditions.
• Features independent thermal shutdown protection on all regulators and drivers to ensure operational safety.
• Provides battery voltage under/over warning outputs and load dump protection for robust system monitoring.

Full Half-Bridge (H Bridge) Drivers Applications

• Automotive body control modules
• Centralized power distribution units
• Smart junction boxes

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify the specific suffix 'U-TR-D' against the official STMicroelectronics datasheet to confirm package type, tape and reel specifications, and regional compliance certifications. Ensure the component matches the required operating temperature range and pinout configuration for your PCB layout. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select this component when a single IC solution is needed to manage multiple voltage rails and drive high-side loads in automotive environments. It is suitable for designs requiring low quiescent current in stand-by modes and integrated protection against common automotive faults such as load dumps and short circuits. Consider the PowerSSO-24 package constraints and thermal dissipation requirements during the initial design phase.

Full Half-Bridge (H Bridge) Drivers Part Context

This part belongs to the L99 series of power management ICs from STMicroelectronics, which are tailored for automotive body electronics. These devices typically combine regulation and switching capabilities to reduce bill-of-materials count and board space. The L9959 specifically targets applications needing isolated or regulated supplies alongside switched loads in a compact form factor.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Consult the official STMicroelectronics replacement guide or datasheet revision history for confirmed substitute part numbers. Verify compatibility regarding pin-to-pin mapping, electrical parameters, and functional equivalence before substituting.