STR-A6059H Sanken Power IC for PWM Type Switching Power Supply with Low Noise and Low Standby Power

STR-A6000 Series

Sanken

Power IC for PWM Type Switching Power Supply 

with Low Noise and Low Standby Power

■ General Descriptions 

The STR-A6000 series products are power ICs for switching power supplies, 

incorporating a power MOSFET and a current-mode type 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 

Current-Mode Type PWM Control 

Built-in Random Switching Function 

The function reduces the EMI noise and enables a simplified (low-cost) EMI filter, 

by the slight- random-change of PMW frequency fOSC. 

Auto-Standby Function: The burst-oscillation enables the low standby power. Input Power PIN <25mW at no load 

Built-in Startup Circuit, enabling low power consumption 

Brown-In / Brown-Out Function 

The function enables the oscillation start/stop by externally rated input voltage and makes protections at low input 

voltage. 

Overcurrent Protection (OCP) with Built-in Input Compensation Circuit: 

The protection has less AC input voltage dependency. 

Overload Protection (OLP) with Built-in Delay Timer

High Speed Latch Release Function 

The function releases the latch immediately at AC supply OFF, after the latch protection operation. 

Bias-Assist Function, reducing Operating VCC voltage drop 

The function improves the startup operation and makes a low VCC capacitor applicable. 

Leading Edge Blanking Function 

Slope Compensation Function 

Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET 

Various Protections 

 Overcurrent Protection (OCP)--------------------------------- Pulse-by-Pulse 

 Overload Protection (OLP) ------------------------------------ Auto-Restart 

 Overvoltage Protection (OVP) -------------------------------- Latch Shutdown 

 Thermal Shutdown Protection (TSD) ------------------------ Latch Shutdown 

■ Applications 

Battery Chargers; Mobile Phones, Digital Cameras, Camcorders, Electric Shavers, Emergency/Inducement Lights etc. 

Standby Power Supplies; LCD-TVs, PDP-TVs, Desk-Top PCs, LBPs, Audio Equipment, etc. 

Small SMPSs; Ink Jet Printers, BD/DVD Players, CD Players, Set-Top-Boxes, etc. 

Auxiliary Power Supplies for Controllers; Air Conditioners, Refrigerators, Washing Machines, Dish Washers, etc 

Note 1: The maximum output power is derived from thermal specifications. The actual output power may be 

available around 120 –140% of the above values, respectively, but may be limited by ON duty setting on

transformer design or lower output voltage.