STR-Y6700 Series: Quasi-Resonant Off-Line Switching Regulators

The STR-Y6700 series products comprise a power MOSFET and a multifunctional monolithic integrated circuit (MIC) controller designed for controlling switch mode power supplies. The quasi-resonant mode of operation, coupled with the bottom-skip function, allows high efficiency and low noise at low to high operational levels, while burst oscillation mode ensures minimum power consumption at standby. In order to sustain low power consumption under low load and in standby mode, the controller has built-in startup and standby circuits. The compact 7-pin full mold package (TO-220F-7L) reduces board space by requiring a minimum of external components, thus simplifying circuit design. This IC, including various protection functions, is an excellent choice for standardized, compact power supplies.

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  • Features and BenefitsFeatures and Benefits
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  • TO–220F–7L package
  • Lead (Pb) free compliance
  • The built-in startup circuit reduces the number of external components and lowers standby power consumption
  • Multi-mode control allows high efficiency operation across the full range of loads
  • Auto burst oscillation mode for standby mode, for improving low standby power at no load: input power <30 mW at 100 VAC and <50 mW at 230 VAC
  • Bottom-skip mode minimizes switching loss at medium to low loads
  • Built-in soft start function reduces stress applied to the incorporated power MOSFET and peripheral components
  • Step-on burst oscillation minimizes transformer audible noise
  • Built-in leading edge blanking (LEB) function eliminates external filter components
  • Built-in Bias Assist function enables stable startup operation
  • VCC operational range expanded
  • Internal power MOSFET is avalanche energy guaranteed; two-chip structure
  • Protection functions
    • Overcurrent protection (OCP): pulse by pulse basis, low dependence on input voltage
    • Overload protection (OLP): latched shutoff*
    • Overvoltage protection (OVP): latched shutoff*
    • Maximum on-time limitation
    • Thermal shutdown protection (TSD): latched shutoff*

* Latched shutoff means the output is kept in a shutoff mode for protection, until reset.

Package

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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
STR-Y6735 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR-Y6753 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR-Y6754 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR-Y6763 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR-Y6765 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR-Y6766 7-lead TO-3P -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock

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