STR3A151, STR3A152, STR3A153, STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Features and Benefits
• Current m...
STR3A151, STR3A152, STR3A153, STR3A154, STR3A155
PWM Off-Line Switching
Regulator ICs
Features and Benefits
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 < 10 mW at no load with low power
consumption shunt
regulator ▫ Normal load operation: PWM switching ▫ Light load operation: Standby mode (Burst oscillation)
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Package: DIP8
Not to scale
Description
STR3A100 series 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 product achieves low power consumption, low standby power, and high cost-effectiveness in power supply systems, while reducing external components.
The products are provided in an industry standard DIP8 package.
Applications
Switching power supplies for electronic devices such as: Stand-by power supply for LCD/PDP television,
desktop PC, multi-function printer, audio equipment, and so forth Small switched-mode power supply (SMPS) for printer, BD/DVD player, set-top box, and so forth Auxiliary power supply for air conditioner, refrigerator, washer, dishwasher, and so forth
VAC
D1
C1
Typical Application
CRD Snubber Circu...