Digital Lite (d PWMTM ) Hybrid Mode PSR Controller


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RT7713 is a Digital Lite (d PWMTM) PWM controller, making a low-cost analog controller embedded with benefits of a digital controller. The controller with an innovated process technology enables system designers to select among a preprogrammed set of critical parameters, delay times, and protection features of the controller to optimize system performance, which significantly shortens project development cycle and improves component selection flexibility.

In addition to the feature of programmability, the RT7713 further improves efficiency with hybrid-mode control. It can automatically switch among continuous-conduction mode (CCM), valley -switching mode (VSM), and green mode (GM) for optimal efficiency operation. The hybrid-mode control can effectively improve efficiency, compared with conventional primary-side regulation (PSR), which operates only in discontinuous-conduction mode (DCM).

The RT7713 includes comprehensive protection features, such as accurate output over-voltage (Output OVP), output under-voltage protections (Output UVP), CS pin open-circuit protection, DMAG pin open-circuit and short-circuit protections, secondary rectifier short-circuit protection (SRSP), and external over-temperature protection (External OTP).


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Key Spec.
RT7713G RT7713GC
Status Active Active
Feedback Regulation Mode PSR PSR
Switching Frequency_Normal (kHz) 80 80
Peak load Application No No
HV Start-up No No
CCM/Valley Multi-mode CCM/Hard Switching Multi-mode CCM/Hard Switching Multi-mode
Programmable Burst/Green-mode No No
Brown-in/out Yes (Buck cap.Side) Yes (Buck cap.Side)
External OTP Yes Yes
UVLO ON (V) 17.5 17.5
UVLO OFF (V) 6.5 6.5
VDD OVP (V) 28 28
Features Current Mode Control;OVP;SCP;UVP Current Mode Control;OVP;OVP;SCP
Package Type SOT-26 SOT-26
  • Programmable Feature with User-Programmable Parameters, Delay Times
  • CC or CV Regulation in CCM and DCM
    ► Primary-Side Constant Voltage Regulation in CCM/DCM
    ► Primary-Side Constant Current Regulation in CCM/DCM
    ► Integrated Cable Drop Compensation
    ► Integrated Line Compensation
  • High Efficiency
    ► Hybrid-Mode Control (CCM/VSM/GM)
    ► Ultra-Low Start-Up Current (< 3μA)
    ► Driver Capability : 100mA/-200mA
  • Proprietary SmartJitterTM Technology
    ► Reducing EMI Emission of SMPS
    ► Reducing Output Ripple from Frequency Jittering
  • Comprehensive Protection Functions
    ► Programmable Bulk-Capacitor Brown-In/Brown- Out Protection
    ► Programmable Output Over-Voltage and Under-Voltage Protections (Output OVP/UVP)
    ► Programmable External Over-Temperature Protection (External OTP)
    ► VDD Over-Voltage Protection, Secondary Rectifier Short-Circuit Protection (SRSP), DMAG Pin Open- and Short-Circuit protections, and CS Pin Open-Circuit Protection
  • Others
    ► RoHS Compliant and Halogen Free
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30