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STR3A255D

Sanken electric

Off-Line PWM Controllers

Off-Line PWM Controllers with Integrated Power MOSFET STR3A200 Series Data Sheet Description The STR3A200 series are p...


Sanken electric

STR3A255D

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Description
Off-Line PWM Controllers with Integrated Power MOSFET STR3A200 Series Data Sheet Description The STR3A200 series are power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC. The low standby power is accomplished by the automatic switching between the PWM operation in normal operation and the burst-oscillation under light load conditions. The product achieves high cost-performance power supply systems with few external components. Features ● Low Thermal Resistance Package ● Current Mode Type PWM Control ● Soft Start Function ● Auto Standby Function No Load Power Consumption < 15mW ● Operation Mode Normal Operation: PWM Mode Standby : Burst Oscillation Mode ● Random Switching Function ● Slope Compensation Function ● Leading Edge Blanking Function ● Bias Assist Function ● Protections − Two Types of Overcurrent Protection (OCP) : Pulse-by-Pulse, built-in compensation circuit to minimize OCP point variation on AC input voltage − Overload Protection (OLP) : Aauto-restart − Overvoltage Protection (OVP) : Latched shutdown or auto-restart − Thermal Shutdown (TSD) : Latched shutdown or auto-restart with hysteresis Typical Application Circuit VAC BR1 C1 C4 T1 D51 C5 R1 P D1 C51 S 8 76 5 D/ST D/ST DN/SCT D/ST U1 STR3A200 S/OCP VCC GND FB/OLP 1234 D2 R2 C2 D L51 R54 PC1 R51 R55 R52 C52 R53 U2 R56 VOUT C53 GND ROCP C3 PC1 CY TC_STR3A200_1_R1 Package DIP8 Not to Scale Lineup ● Electrical Characteristics fOSC(AVG) = 67 kHz VDSS(...




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