L9907TR

Overview

The L9907TR is a highly integrated three-phase gate driver unit designed for brushless DC (BLDC) motors in automotive applications. It controls six N-channel FETs and operates with a supply voltage range from 4.2 V to 54 V, supporting systems up to 54 V. The device features an integrated boost regulator for full Rds(on) down to 6 V battery voltage. It includes two programmable differential current sense amplifiers and an 8 MHz, 16-bit SPI interface for configuration and diagnostics. Key electrical parameters include a PWM operation frequency up to 20 kHz and adjustable gate driver controlled current up to 600 mA.

Feature Summary

• Integrated boost regulator ensures sufficient gate charge for power MOSFETs even at low battery voltages down to 6 V.
• Dual programmable differential current sense amplifiers allow flexible phase or ground current sensing strategies via SPI.
• Comprehensive diagnostic capabilities accessible through the SPI interface, including over-temperature and short-circuit detection.
• Independent control of six pre-driver channels supports various electric motor control strategies.

Applications

• Electric power steering systems
• Electric brake booster applications
• Generic brushless DC motor driving

Procurement Notes

Verify the specific suffix 'TR' indicates the reel packaging format when ordering. Confirm that the component meets AEC-Q100 qualification requirements for your automotive application. Ensure the design accommodates the VFQFN-48 package dimensions and thermal characteristics. Check for any recent product change notices regarding pinout or electrical specifications before finalizing the bill of materials.

Selection Notes

Select this component for automotive BLDC motor applications requiring high integration and robust protection. It is suitable for 48V NET Active systems and double battery environments. Consider the SPI interface complexity if microcontroller resources are limited. Evaluate the need for external current sense resistors based on the amplifier gain settings. Verify compatibility with 3.3 V and 5 V logic levels for control signals.

Part Context

The L9907 is part of STMicroelectronics' portfolio of motor drivers specifically engineered for automotive safety and performance. It replaces discrete solutions by integrating gate drivers, current sensing, and protection circuits into a single chip. This integration reduces board space and simplifies the design process for complex motor control algorithms in demanding automotive environments.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. Designers should evaluate other STMicroelectronics motor bridge drivers or pre-drivers based on channel count and voltage ratings. Cross-referencing pinouts and electrical characteristics is essential when considering alternative components.

FAQ

What is the maximum operating temperature for the L9907?

The maximum operating temperature is +150 C.

Can the gate output current be adjusted during operation?

Yes, four gate output current levels can be selected via the SPI interface even while the application is running.

Is the L9907 qualified for automotive use?

Yes, the device is AEC-Q100 qualified.