onsemi NCL30125B2DR2G

The NCL30125 is a fixed−frequency current−mode controller featuring the Dynamic Self−Supply (DSS). This function greatly simplifies the design of the auxiliary supply and the Vcc capacitor by activating the internal startup current source to supply the controller during start−up, transients, latch, stand−by etc. With a supply range up to 35 V, the controller hosts an adjustable switching frequency with jittering function operated in peak current mode control. When the power on the secondary side drops drastically, the part enters skip cycle while limiting the peak current that insures the output voltage regulation and excellent efficiency in light load condition. It features a timer−based fault detection that ensures the detection of overload and a brown−out protection against low input voltages.

• Integrated High−side Driver
• Adjustable Switching Frequency Up to 300 kHz
• Peak Current−mode Control
• Skip Mode to Maximize Performance in Light Load Conditions
• High−voltage Current Source with DSS
• Brown−out (BO) Detection
• Internal Slope Compensation
• Adjustable Soft−start Duration
• Frequency Jittering
• 15 ms Timer−based Short−circuit Protection with Auto−recovery or Latched Operation
• Auto−recovery or Latched OVP on Vcc
• Latched OVP/OTP Input for Improved Robustness
• 35 - V Vcc Operation
• +0.9 A / −1.2 A Peak Source/Sink Drive Capability
• Internal Thermal Shutdown
• These Devices are Pb−Free and are RoHS Compliant

• Power Supplies for PC Silver Boxes, Games Adapter
• Two−Switch Forward Converter
• Dc−to−Dc Application Capability