STR5A464S

For Non-Isolated Off-Line PWM Controllers with Integrated Power MOSFET STR5A460 Series Data Sheet Description The STR5A460 Series is power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC for non-isolated Buck converter and Inverting converter topologies. The operation mode is automatically changed, in response to load, to the fixed switching frequency, to the switching frequency control, and to the burst oscillation mode. Thus the power efficiency is improved. The product achieves high cost-performance power supply systems with few external components. Features ● Buck converter ● Inverting converter ● Current mode type PWM control ● Automatically changed operation mode in response to load conditions Fixed switching frequency mode, 60 kHz (typ.) Green mode, 23 kHz (typ.) to 60 kHz (typ.) Burst oscillation mode ● No need for current detection resistor, building in a MOSFET used as current sense resistor ● Built-in Startup Function ,reducing power consumption, and shortening the startup time ● Built-in Error Amplifier ● Random Switching Function ● Leading Edge Blanking Function ● Soft Start Function ● Protections Overload Protection (OLP): Auto-restart Overvoltage Protection (OVP): Auto-restart Thermal Shutdown with hysteresis (TSD): Auto-restart Typical Application (Buck Convertor, DIP8) D1 D2 STR5A460D 1 FB 8 S/GND R2 R3 R1 C4 C3 2 VCC 7 S/GND L1 DR1 VAC C1 4 D/ST 6 S/GND 5 S/GND U1 C2 VOUT (+) L2 D3 C5 R4 DR2...