STR2W100D Series: Current Mode Control PWM Regulator ICs For Switching Power Supplies

The STR2W152D and STR2W153D are power ICs for switching power supplies, incorporating a power MOSFET and a current mode PWM controller IC in one package.

Including a startup circuit and a standby function in the controller, the products achieve low power consumption, low standby power, and high cost-effectiveness in power supply systems, while reducing external components.

The products are provided in fully molded TO-220 package types. Pin 2 is deleted for greater isolation.

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  • Current mode PWM control
  • Built-in Random Switching function: reduces EMI noise, simplifies EMI filters, and cuts cost by external part reduction
  • Built-in Slope Compensation function: avoids subharmonic oscillation
  • Built-in Leading Edge Blanking (LEB) function
  • Auto Standby function:
    • Input power, PIN <25 mW at no load
    • Normal load operation: PWM switching
    • Light load operation: Standby mode (Burst oscillation)
  • Soft Start function: reduces stress on internal power
  • MOSFET and output rectifier diode
  • Protection Functions:
    • 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); Auto restart
    • Thermal Shutdown function (TSD); Auto restart

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Product Image Functional Block Diagram Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
STR2W152D 6-lead TO-220 -20°C to 85°C Yes View Data New Contact your
local sales rep
Check Stock
STR2W153D 6-lead TO-220 -20°C to 85°C Yes View Data New 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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