U3015

U3015 is a high-performance, low-cost PWM control power device designed for offline low-power buck applications, featuring a simple peripheral circuit with a minimal component count. The built-in high-voltage MOSFET in the startup module enhances the system's surge withstand capability. With no fixed internal clock driving the MOSFET, the system switching frequency automatically adjusts with load variations. Multi-mode PWM control technology effectively simplifies peripheral circuit design, improves line regulation and load regulation, and eliminates audible noise during system operation. The internal peak current detection threshold automatically adjusts according to the actual load condition, effectively reducing standby power consumption under no-load conditions. Comprehensive self-recovering protection features are integrated, including VDD undervoltage protection, cycle-by-cycle current limiting, output overvoltage protection, over-temperature protection, overload protection, and VDD overvoltage protection. The U3015 series is a multi-mode PWM control power switch with integrated high-voltage startup and power supply functions, supporting offline non-isolated buck and buck-boost topologies. It is suitable for small appliance power supplies and linear power supply replacement applications, offering high output accuracy and low peripheral cost.

Applications

• Telecom 90V power systems
• Ethernet PoE
• Industrial control
• Inverter systems

Key features

• VIN: 12~180V (OUT: ADJ)
• Integrated 2.5A 180V MOSFET
• Integrated 200V high-voltage startup circuit
• Multi-mode control, audible noise-free operation
• Supports buck and buck-boost topologies
• Default 14.3V output (FB pin floating)
• Standby power consumption below 50mW
• Excellent line regulation and load regulation
• Integrated soft-start circuit
• Internal protection features: Overload Protection (OLP), cycle-by-cycle current limiting (OCP), output OVP, VDD overvoltage, undervoltage, and voltage clamp protection