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RT7079

Three-Phase PMSM/BLDC Motor Controller with Pre-Driver

RT7079
New

The RT7079 is an application specific IC designed for PMSM/BLDC motor applications. This two-in-one ASIC integrates several functional circuits, namely a 3-phase motor controller, a 3-phase gate driver, three bootstrap diodes, a 5V LDO regulator and a buck converter. The RT7079 embeds the ARM 32-bit Cortex-M0 core with peripheral circuits to perform the sensorless with field oriented control (FOC). In addition, several system level peripheral functions, such as ADC, DAC, communication interface, SVPWM, watchdog timer, current sensing, undervoltage-lockout (UVLO), short circuit protection (SCP) and locked-rotor protection are integrated so as to reduce component count, PCB size and system cost.

Furthermore, the RT7079 drives external N-Channel MOSFETs in three half-bridge configuration with a built-in bootstrap network up to 58V. A dead time control is built-in to prevent shoot-through of the external N-Channel MOSFETs.

The RT7079 is available in WQFN-48L 7x7 package.

Applications

  • Fan Applications : Exhaust Fan, Pedestal Fan, Ventilation Fan etc.
  • Water Pump
  • Vacuum Cleaner

Key Spec.

RT7079
Status Active
Number of Phases 3
System Frequency (MHz) 60
ADC resolution (bits) 10
MCU supply voltage, Min (V) 4.85
MCU supply voltage, Max (V) 5.15
Driver Supply Voltage, Min (V) 7
Driver Supply Voltage, Max (V) 10
Driver Break Down Voltage (V) 70
Driver Operation Voltage (V) 58
Driving Capability, IO+ (mA) 70
Driving Capability, IO- (mA) 500
Features Built-in Bootstrap Switch;I2C;OCP;OVP;SCP;UVLO;UVP
Package Type WQFN7x7-48

Features

  • Integrated 3-Phase PMSM/BLDC Controller, Gate Driver, Bootstrap Diodes, 5V LDO Regulator and Buck Converter

  • Input Voltage Range : 8V to 58V

  • Sensorless, Sine-Wave Field Oriented Control (FOC)

  • Protections : SCP, UVLO and Locked-Rotor Protection

  • PMSM/BLDC Motor Controller
    ► ARM 32-bit Cortex-M0 CPU, Frequency Up to 60MHz
    ► Memories Size : 16kB MTP, Internal ROM with Embedded Motor Control Library and 4kB SRAM
    ► Power Management : Normal or Deep Sleep
    ► Communication Interface : I2C and UART
    ► 10-Channel 10-Bit ADC
    ► 1-Channel Current Type 6-Bit DAC
    ► 1-Channel Voltage Type 8-Bit DAC

  • Gate Driver
    ► Floating Channel Designed for Bootstrap Operation
    ► Sourcing/Sinking Current : 70mA/500mA

  • WQFN-48L 7x7 Package

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