STR-W605xS Series: Current Mode Control PWM Regulator IC For Switching Power Supplies

The STR-W605xS series are power ICs for switching power supplies, incorporating a power MOSFET and a current mode PWM controller IC. Including a startup circuit and a standby function in the controller, the product achieves low power consumption, low standby power, and high cost-effectiveness power supply systems with few external components.

The STR-W605xS internal MOSFET has a VDSS of 650 V (min), and an RDS(on) of 1.9 Ω (max) to 3.95 Ω (max) with a frequency of 67 kHz. Power output is rated at 45 to 90 W at 230 VAC input and 30 to 60 W at wide input range (85 to 265 VAC).

The device is provided in an industry-standard TO-220 package, with heatsink mounting flange and pin 2 removed for increased supply isolation.

Applications

For switching power supplies used in:

  • White goods
  • Consumer electronics
  • Office automation
  • Industrial equipment
  • Communication equipment
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  • Features and BenefitsFeatures and Benefits
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  • Technical DocsTechnical Docs
  • NewsNews
  • TO-220F power package with 30 to 90 W power output
  • Current Mode PWM control
  • Built-in Random Switching function, reducing EMI noise, and simplifying EMI filters, and therefore reducing cost
  • Built-in Slope Compensation function, avoiding subharmonic oscillation
  • Built-in Auto Standby function (Input Power, PIN < 30 mW at no load)
    • Normal operation: PWM mode
    • Light load operation: Standby mode (burst oscillation)
  • Built-in Audible Noise Suppression function during Standby mode
  • Built-in Startup Circuit, reducing power consumption in standby operation, and eliminating external components.
  • Bias-Assist function, improving startup operation, suppressing VCC voltage drop in operation, and allowing use of smaller VCC capacitor
  • Built-in Leading Edge Blanking function
  • Built-in High Speed Latch Release function, releasing the latch shutdown immediately at turning off AC supply
  • Two-chip structure, with a controller and a power MOSFET with guaranteed avalanche energy available to simplify surge absorber circuits
  • Protection functions:
    • Brown-In and Brown-Out Protection function: auto-restart, prevention of excess input current and heat rise at low input voltage
    • Overcurrent Protection function (OCP): pulse-by-pulse built-in compensation circuit to minimize OCP point variation on AC input voltage
    • Overload Protection function (OLP): auto-restart, built-in timer, reduces heat during overload condition, and no external components required
    • Overvoltage Protection function (OVP): latched shutdown
    • Thermal Shutdown Protection function (TSD): shutdown latches device off to prevent continuous oscillation

The device is provided in an industry-standard TO-220 package, with heatsink mounting flange and pin 2 removed for increased supply isolation.

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Functional Block Diagram Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
STR-W6051S 6-lead TO-220 -20°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
STR-W6052S 6-lead TO-220 -20°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
STR-W6053S 6-lead TO-220 -20°C to 125°C Yes View Data Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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