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The STR-X6700 series products are power ICs for quasi-resonant type switching power supplies, incorporating a power MOSFET and a controller IC, The product achieves highefficiency and low noise power supply systems by the quasi-resonant operation and the bottom-skip quasi-resonant operation.
A compact 6 pin full mold package (TO-3P, Sanken Electric designation: 3GR-X), helps realize low component count, and high performance-to-cost power supply.

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    ・Multi-Mode Control
     -In Standby (Under Standby Load Conditions):
      UVLO Intermittent Oscillation by low output voltage --- Switched by Standby Signal, or
      Auto Burst-Oscillation --- Switched Automatically
     -Under Low to Middle Load Conditions: Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR)
     -Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR)
    ・Current-mode control
    ・Built-in PWM Oscillator
    ・Soft-Start Function
    ・Step-Drive Function
    ・Built-in Maximum ON Time Limitation Circuit
    ・Input Compensation at Overcurrent
    ・Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
    ・Protection functions:
     Overcurrent protection (OCP): pulse by pulse
     Overload protection (OLP): latch shutdown
     Overvoltage protection(OVP): latch


    ・Digital appliances
    ・White goods
    ・Office automation (OA) equipment
    ・Industrial equipment
    ・Telecommunication equipment
    ・Other S.M.P.S


Control Method Quasi-Resonant
Type Power IC
Output Current W
RDS(ON) (max.) 0.620 Ω
VDSS (min.) 650 V
VCC (max.) 35 V
Oscillating Frequency(typ.) ― kHz
OLP Latch
OVP Latch
Brown-in / out NO
TSD None
Power Consumption at No Load

Typical Application

Typical Application

Block Diagram

Block Diagram

Selection Guide


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