L9960T

Full Half-Bridge (H Bridge) Drivers Overview

The L9960T is an automotive-grade dual H-bridge motor driver IC designed for brushed DC motor applications. It operates within a supply voltage range of 4V to 28V and supports output currents up to 9A. The device features a 36-pin PowerSSO-36 package with an exposed pad for thermal management. Key electrical specifications include a typical on-resistance of 400 mΩ (LS + HS) and a maximum operating junction temperature of 170°C. It utilizes SPI for configuration and diagnostics, supporting AEC-Q100 qualification.

Full Half-Bridge (H Bridge) Drivers Feature Summary

• Dual H-bridge architecture with integrated free-wheeling diodes for efficient power dissipation during freewheeling conditions.
• Serial Peripheral Interface (SPI) enables comprehensive parameter adjustment, mode control, and detailed channel-specific diagnostic reporting.
• Advanced protection mechanisms including over-temperature shutdown, short-circuit detection to battery and ground, overload protection, and open-load detection in the ON state.
• Configurable driving strategy via PWM/DIR pins allowing flexible control interfaces compatible with both 5V and 3.3V logic systems.

Full Half-Bridge (H Bridge) Drivers Applications

• Brushed DC motor control in automotive environments
• Evaluation of L9960T functionalities using dedicated development boards
• Integration with SPC5 Discovery+ boards for system-level testing

Full Half-Bridge (H Bridge) Drivers Procurement Notes

Verify component status as the L9960T may be subject to obsolescence notices. Confirm specific ordering suffixes for tape-and-reel packaging requirements. Ensure compatibility with existing PCB footprints for the PowerSSO-36 EPD package. Validate that the selected variant meets current automotive quality standards and RoHS compliance requirements before finalizing procurement decisions.

Full Half-Bridge (H Bridge) Drivers Selection Notes

Select the L9960T for applications requiring robust dual H-bridge control with extensive diagnostic feedback via SPI. Consider its wide voltage range and high thermal tolerance for demanding automotive loads. Evaluate the need for configurable current limiting levels between 2.5A and 8.6A. Ensure the design accommodates the 36-pin surface mount package and provides adequate thermal relief for the exposed pad.

Full Half-Bridge (H Bridge) Drivers Part Context

The L9960T belongs to STMicroelectronics' portfolio of automotive motor drivers, specifically engineered for brushed DC motors. It serves as the advanced counterpart to the L9960, offering enhanced diagnostic capabilities through SPI. The component is integral to evaluation kits like EVAL-L9960T, facilitating rapid prototyping and validation of motor control strategies in automotive electronic control units.

Full Half-Bridge (H Bridge) Drivers Replacement Considerations

Public documentation indicates the L9960T is obsolete. Verify availability of alternative components from STMicroelectronics or other manufacturers that match the 36-pin PowerSSO-36 footprint, 28V rating, and SPI interface. Ensure functional equivalence in terms of current handling and diagnostic features before substitution.

Full Half-Bridge (H Bridge) Drivers FAQ

What diagnostic functions are accessible via the SPI interface?

The SPI interface allows access to detailed failure diagnostics for each channel, including short circuit to battery, short circuit to ground, short circuit overload, over temperature, and open-load detection in the ON condition.

How is the current limitation threshold configured?

The current limitation threshold is set via the SPI interface, offering four configurable levels ranging from 2.5A to 8.6A typically.

Is the L9960T compatible with standard microcontroller logic levels?

Yes, the board and device are compatible with both 5V and 3.3V control systems, allowing connection to various microcontroller boards.