The RT7055 is one of Richtek's sIPM® series, which are designed for advanced motor drive applications. This ASIC consists of a PMSM/BLDC controller, LDOs, the gate driver, bootstrap diodes and IGBTs. It optimizes these devices specifically designed for PMSM/BLDC motor applications so as to provide great benefits to users with cost-effectiveness, easy design, board space saving and high reliability.

The RT7055 is available in a VQFN13x13 package.


  • PMSM/BLDC Motor
  • Air Conditioner Indoor Fan
  • Pedestal Fan
Key Spec.
Status Active
Drain to Source Breakdown Voltage, BVDSS (V) 450
Driver Supply Voltage, Min (V) 13.5
Driver Supply Voltage, Max (V) 16.5
Max On-Voltage Vce (V) 3
Features Built-in Bootstrap Switch;I2C;OCP;OVP;SCP;UVP
Package Type VQFN13x13-38
  • Integrated 3-Phase PMSM/BLDC Controller, LDOs, Gate Driver, Bootstrap Diodes and IGBTs
  • Sensorless and Sinewave Field Oriented Control
  • Optimized Switching Loss and EMI Trade-Offs
  • Built-In Short Circuit, Under-Voltage Lockout (UVLO) and Locked-Rotor Protection
  • Temperature Sensor Embedded
  • Motor Controller
    ► ARM 32-bit Cortex-M0 CPU
    ► Memory Size 16KB MTP, Internal ROM with Embedded Motor Control Library and 4KB SRAM
    ► Normal or Deep Sleep Mode for Power Saving
    ► I2C and UART Communication Interface
    ► 7-Channel 10-bit ADC 
        ♦ AD0 to AD5 for Differential Mode Current Sense
        ♦ AD6 to AD9 for System Application
    ► 1-Channel 8-bit DAC
  • Gate Driver
    ► Built-In UVLO Function
    ► Shoot through Prevention
    ► Matched Propagation Delay
  • IGBTs
    ► Conduction Voltage VCE(ON) = 2.5V (Typ.)
    ► Low Reverse Recovery Charge
  • RT7055GQV with Firmware Code UXYY1 Certified by UL for IEC 60730-1 Class B Compliance with Recognized Marking :
  • UL Certified No. E478780 (UL 60730-1)
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Selection Guide [Oct., 2022] Selection Guide2022/10/01