The RT7083 is an application specific IC designed for PMSM/BLDC motor applications. This two-in-one ASIC integrates several functional circuits, including a 3-phase motor controller, a 3-phase gate driver, three bootstrap diodes, a 5V LDO, and a buck converter.
The RT7083 embeds the ARM 32-bit Cortex-M0 core with peripheral circuits to perform sensorless Field Oriented Control (FOC). In addition, this ASIC provides several system level peripheral functions, in which 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.
Moreover, the RT7083 drives external N-Channel MOSFETs in three half-bridge configuration with built-in bootstrap circuitry up to 58V. A dead time control is designed to prevent shoot-through of the external N-Channel MOSFETs.
The RT7083 is available in a WQFN-48L 6x6 package. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 105°C.


  • Fan Applications: Exhaust Fan, Pedestal Fan, Ventilation Fan, etc.
  • Water Pump
  • Vacuum Cleaner
Key Spec.
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) 6.6
Driver Supply Voltage, Max (V) 12
Driver Break Down Voltage (V) 70
Driver Operation Voltage (V) 58
Driving Capability, IO+ (mA) 200
Driving Capability, IO- (mA) 500
Features Built-in Bootstrap Switch;I2C;OCP;OVP;SCP;UVLO;UVP
Package Type WQFN6x6-48
  • Integrates with 3-Phase PMSM/BLDC Controller, Gate Driver, Bootstrap Diodes, 5V LDO, and Buck Converter
  • Input Voltage Range: 7V to 58V
  • Sensorless Field Oriented Control (FOC) with Optional Hall Sense Startup Strategy
  • Integrates with Filters at ADC Input
  • Protections: SCP, UVLO, Locked-Rotor, and Thermal Detection
  • 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
    - Configurable ADC Gain: x1, x4, x8, x16
    - 7-Channel 10-Bit ADC
      - AD0 to AD5 for Differential Mode Current Sense
      - AD6 to AD9 for System Application
    - 1-Channel Voltage Type 8-bit DAC for Debugging
  • Gate Driver
    - Floating Channel designed for Bootstrap operation
    - Sourcing/Sinking Current: 200mA/500mA
    - Built-In UVLO Functions for All Channels
    - Matched Propagation Delays for all channels
  • RT7083GQW with Firmware Code UXYY1 Certified by UL for IEC 60730-1 Class B Compliance with Recognized Marking:
  • UL Certified No. E478780 (UL 60730-1)
  • WQFN-48L 6x6 Package
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18