6EDL7141XUMA1

The MOTIX 6EDL7141 is a gate driver IC for 3 phase BLDC or PMSM motor drive applications. It provides three half - bridge drivers, each capable of driving a high side and low side N - type MOSFET. The gate driver is also provided with programmable dead time delays for preventing current shootthrough between HS and LS switches in normal operation. Separate charge pumps for low and high side gate drivers support 100% duty cycle and low voltage supply operation. Supplies for the gate drivers are programmable to one of the following levels: 7 V, 10 V, 12 V or 15 V. Additionally, the slew rate of the driving signal can be programmed with fine granularity to reduce EMI emissions. An integrated synchronous buck converter provides an efficient supply of current to the rest of the system. However, power tool systems require high precision current measurements, involving a very precise ADC reference voltage. For that purpose, 6EDL7141 uses a linear voltage regulator (up to 300mA), powered by the buck converter to supply the MCU and other sensitive components in the system. With this advanced power supply architecture, not only the best possible signal quality is achieved, but also the power efficiency is optimized at any input and output condition. 6EDL7141 includes three current sense amplifiers for accurate current measurements that support bidirectional low side current sensing with programmable gain. RDSON sensing is supported through internal connection of the phase nodes to the current sense amplifiers inputs. Temperature compensation if needed shall be provided by the user application. Outputs of current sense amplifiers support both 3.3V and 5V allowing most commercial controllers to be compatible. Low noise, low settling times and high accuracy are the main features of the integrated operational amplifiers. An internal buffer can be used to offset the sense amplifier outputs for optimizing the dynamic range. The device provides numerous protection features for improving application robustness during adverse conditions like monitoring of power supply voltages as well as system parameters. The failure behavior, threshold voltages and filter times of the supervisions of the device are adjustable via SPI. Monitored aspects include inverter currents, gate drive voltages and currents, device temperature, and rotor locked. When a fault occurs, the device stops driving and pulls nFAULT pin low, in order to prevent system damage or other possible malfunction. This signal can be connected to a microcontroller to inform the processor that a fault has happened. The microcontroller can request more information on the fault via SPI commands. The integrated SPI interface can be used to configure 6EDL7141 for the application. The SPI provides both detailed fault reporting and flexible parameter settings such as gain of the current sense amplifiers, slew rate control of the gate drivers, various protection features or gate driver voltage.

Applications

• Power tools
• Gardening tools
• 3 Phase BLDC and PMSM motors
• E - bikes
• Robotics, RC toys, consumer drones and multi - copters
• Pumps and fans

Key features

• 3 phase smart gate driver
• 5.5 V to 60 V operating supply voltage (recommended operating condition)
• 1.5 A sink/ 1.5 A source peak gate driver currents
• Programmable driving voltage (7 V, 10 V, 12 V, 15 V)
• Independently programmable high side/low side slew rate control
• Independently programmable dead time for turn on/off switching
• Control using 3PWM or 6PWM inputs up to 200 kHz
• Built - in commutation tables for using 1PWM with or without Hall sensors
• Integrated power supplies:
• High efficiency synchronous buck converter with programmable switching frequency. Supplies gate driver charge pumps, DVDD linear regulator and both internal and external components
• Linear regulator with 300 mA current capability for MCU and other components supply (DVDD)
• Dual charge pump for supplying gate driver even at low supply voltage
• Three integrated current sense amplifiers:
• Adjustable gain and offset
• Configurable low side RDSON sensing
• Three integrated Hall sensor comparators
• Integrated ADC for signal monitoring
• Locked rotor detection
• 3.3 V/5 V compatible digital interface
• Programmable SPI digital interface
• External brake with programmable braking response
• Over - Current Protection (OCP) on current sense amplifiers (programmable)
• Over - Current Protection (OCP) for buck converter and DVDD linear regulator (programmable)
• Under - Voltage Lockouts (UVLO) for internal and external supplies
• Over - Voltage Fault (OVLO) reporting for buck converter and DVDD linear regulator
• Over - Temperature warning and shutdown (OTW, OTS)
• Programmable watchdog timer
• Reporting through nFAULT and SPI registers
• Thermally enhanced 48pin VQFN package