L9856-TR

Overview

The L9856-TR is a high-voltage high-side driver manufactured using BCD OFF-LINE technology, designed to drive N-Channel Power MOS transistors. It features a floating upper section supporting voltage rails up to 160V and includes integrated reset circuitry with under-voltage lockout. The device utilizes CMOS/TTL Schmitt trigger inputs for direct interfacing with control logic. Key electrical characteristics include a driver current capability of 500mA source and 500mA sink, switching times of 100ns rise/fall with a 2.5nF load, and dV/dt immunity of ±50V/nsec across the full temperature range.

Feature Summary

• Supports high-voltage floating sections up to 160V for driving external power MOSFETs
• Provides robust dV/dt immunity of ±50V/nsec across the complete operating temperature range
• Integrates internal clamping on VCC and under-voltage lockout protection mechanisms

Applications

• High-side switching applications in automotive environments
• Driving N-Channel Power MOS transistors in industrial power systems
• Interfaces requiring CMOS or TTL compatible logic input levels

Procurement Notes

Verify the specific suffix against official STMicroelectronics documentation to confirm package type and tape/reel specifications. Ensure the component meets required AEC-Q100 or other relevant automotive qualification standards if deployed in vehicle systems. Confirm that the 160V rail rating aligns with the target application's maximum voltage requirements and thermal dissipation capabilities.

Selection Notes

Select this component when a single-channel high-side driver capable of handling 160V floating potentials is required. It is suitable for designs needing strong dV/dt immunity and direct CMOS/TTL interface compatibility without additional level shifting. Consider the 500mA peak drive current for sizing external bootstrap capacitors and ensuring adequate gate charge delivery for the connected MOSFET.

Part Context

The L9856 belongs to STMicroelectronics' portfolio of high-voltage drivers utilizing BCD OFF-LINE technology. This family focuses on robust solutions for controlling power stages in demanding environments. The device integrates essential protection features like under-voltage lockout and reset circuitry, simplifying system design for high-side switching applications compared to discrete implementations.

Replacement Considerations

Consult official STMicroelectronics substitution guides for verified alternatives. Generic high-side drivers may lack the specific 160V floating capability or dV/dt immunity characteristics.