Off-Line PWM Controllers with Integrated Power MOSFET STR3A100 Series General Descriptions Package The STR3A100 series are power ICs for switching power supplies, incorporating a MOSFET and a current DIP8 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 Not to Scale cost-performance power supply systems with few external components. Lineup Features Electrical Characteristics Low Thermal Resistance Package : 44 W(max.) in V OVP DSS f Products OSC(AVG) Universal Design (open frame) (min.) /TSD Current Mode Type PWM Control Latched STR3A1 67 kHz 650 V shutdown No Load Power Consumption < 15mW STR3A1D 67 kHz 650 V Auto restart Auto Standby Function Normal Operation ----------------------------- PWM Mode STR3A1HD 100 kHz 700 V Auto restart Standby ---------------------------- Burst Oscillation Mode Soft Start Function MOSFET ON Resistance and Output Power, P * OUT Random Switching Function P P OUT OUT (Adapter) (Open frame) Slope Compensation Function R DS(ON) Products (max.) AC85 AC85 Leading Edge Blanking Function AC230V AC230V ~265V ~265V Bias Assist Function f = 67 kHz OSC(AVG) Protections STR3A151 Two Types of Overcurrent Protection (OCP) 4.0 29.5 W 19.5 W 37 W 23 W Pulse-by-Pulse, built-in compensation circuit to STR3A151D minimize OCP point variation on AC input voltage STR3A152 3.0 33 W 23.5 W 45 W 29 W Overload Protection (OLP) auto-restart STR3A152D Overvoltage Protection (OVP) latched shutdown or STR3A153 auto-restart 1.9 37 W 27.5 W 53 W 35 W Thermal Shutdown (TSD) latched shutdown or STR3A153D auto-restart STR3A154 1.4 41 W 31 W 60 W 40 W STR3A155 1.1 45 W 35 W 65 W 44 W Typical Application Circuit STR3A155D f = 100 kHz OSC(AVG) L51 BR1 D51 VOUT T1 VAC STR3A161HD 4.2 25 W 20 W 36 W 24 W R54 C5 R1 R51 STR3A162HD 3.2 28 W 23 W 40 W 28 W PC1 C1 P R55 C51 D1 STR3A163HD 2.2 32 W 25.5 W 46 W 33.5 W R52 S C53 C52 R53 * The output power is actual continues power that is measured at 50 C ambient. The peak output power can be 120 to 140 % of U2 6 5 8 7 R56 D2 R2 the value stated here. Core size, ON Duty, and thermal design D/ST D/ST D/STNC D/ST C4 U1 affect the output power. It may be less than the value stated here. GND STR3A100 D C2 S/OCP VCC GND FB/OLP 1 2 3 4 Applications Low power AC/DC adapter R C3 OCP C Y White goods PC1 Auxiliary power supply Other SMPS STR3A100 - DS Rev.1.5 SANKEN ELECTRIC CO.,LTD. 1 Nov. 20, 2014 STR3A100 Series CONTENTS General Descriptions ----------------------------------------------------------------------- 1 1. Absolute Maximum Ratings --------------------------------------------------------- 3 2. Electrical Characteristics ------------------------------------------------------------ 4 3. Performance Curves ------------------------------------------------------------------ 6 3.1 Derating Curves --------------------------------------------------------------- 6 3.2 MOSFET Safe Operating Area Curves ---------------------------------- 6 3.3 Ambient Temperature versus Power Dissipation Curves ------------ 8 3.4 Transient Thermal Resistance Curves ----------------------------------- 8 4. Functional Block Diagram ---------------------------------------------------------- 10 5. Pin Configuration Definitions ------------------------------------------------------ 10 6. Typical Application Circuit -------------------------------------------------------- 11 7. Package Outline ----------------------------------------------------------------------- 12 8. Marking Diagram -------------------------------------------------------------------- 12 9. Operational Description ------------------------------------------------------------- 13 9.1 Startup Operation ----------------------------------------------------------- 13 9.2 Undervoltage Lockout (UVLO) ------------------------------------------- 13 9.3 Bias Assist Function --------------------------------------------------------- 13 9.4 Soft Start Function ---------------------------------------------------------- 14 9.5 Constant Output Voltage Control ---------------------------------------- 14 9.6 Leading Edge Blanking Function ---------------------------------------- 15 9.7 Random Switching Function ---------------------------------------------- 15 9.8 Automatic Standby Mode Function-------------------------------------- 15 9.9 Overcurrent Protection (OCP) ------------------------------------------- 16 9.10 Overload Protection (OLP) ------------------------------------------------ 17 9.11 Overvoltage Protection (OVP) -------------------------------------------- 17 9.12 Thermal Shutdown (TSD) ------------------------------------------------- 18 10. Design Notes --------------------------------------------------------------------------- 18 10.1 External Components ------------------------------------------------------- 18 10.2 PCB Trace Layout and Component Placement ----------------------- 20 11. Pattern Layout Example ------------------------------------------------------------ 22 12. Reference Design of Power Supply ----------------------------------------------- 23 OPERATING PRECAUTIONS -------------------------------------------------------- 25 IMPORTANT NOTES ------------------------------------------------------------------- 26 STR3A100 - DS Rev.1.5 SANKEN ELECTRIC CO.,LTD. 2 Nov. 20, 2014 Not Recommended for New Designs