Product Summary

The 2BS01 is a controller. The 2BS01 provides several special enhancements to satisfy the needs for low power standby and protection features. In standby mode frequency reduction is used to lower the power consumption and provide a stable output voltage in this mode. The frequency reduction of the 2BS01 is limited to 20kHz / 21.5 kHz (typ.) to avoid audible noise. In case of failure modes like open loop, overvoltage or overload due to short circuit the 2BS01 switches in Auto Restart Mode which is controlled by the internal protection unit. By means of the internal precise peak current limitation the dimension of the transformer and the secondary diode can be lower which leads to more cost efficiency.

Parametrics

2BS01 absolute maximum ratings: (1)VCC Supply Voltage, VCC: -0.3 to 22 V; (2)FB Voltage, VFB: -0.3 to 6.5 V; (3)SoftS Voltage, VSoftS: -0.3 to 6.5 V; (4)ISense, ISense: -0.3 to 3 V; (5)Junction Temperature, Tj: -40 150℃; (6)Storage Temperature, TS: -50 150℃; (7)Thermal Resistance Junction-Ambient, RthJA: 90 K/W; (8)Thermal Resistance Junction-Ambient, RthJA: 185 K/W; (9)ESD capability, VESD: 2 kV.

Features

2BS01 features: (1)Only few external Components required; (2)Input Undervoltage Lockout; (3)67kHz/100kHz fixed Switching Frequency; (4)Max Duty Cycle 72%; (5)Low Power Standby Mode to support Blue Angle Norm; (6)Latched Thermal Shut Down; (7)Overload and Open Loop Protection; (8)Overvoltage Protection during Auto Restart; (9)Adjustable Peak Current Limitation via External Resistor; (10)Overall Tolerance of Current Limiting <±5%; (11)Internal Leading Edge Blanking; (12)Soft Start; (13)Soft Switching for Low EMI.

Diagrams

2BS01 typical application