NCP12510BSN65T1G

The NCP12510 is a highly integrated PwM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP - 6 package. With a voltage supply range up to 35 V, the controller hosts a jittered 65 - kHz or 100 - kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts decreasing, the controller automatically folds back its switching frequency down to a minimum level of 26kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. Over Power Protection (OPP) is a difficult exercise especially when no - load standby requirements drive the converter specifications. The proprietary integrated OPP allows harness the maximum delivered power without affecting the standby performance simply via two external resistors. An Over Voltage Protection (OVP) input is also combined on the same pin and protects the whole circuitry in case of optocoupler destruction or adverse open loop operation. Finally, a timer - based short - circuit protection offers the best protection scheme, allowing precisely select the protection trip point without caring of a loose coupling between the auxiliary and the power windings. NCP12510 is improved and pin compatible controller based on very popular flyback controller NCP1250.

Applications

• Ac - dc Converters for TVs, Set - top Boxes and DVD Players
• Offline Adapters for Notebooks and Netbooks

Key features

• Fixed - Frequency 65 kHz or 100kHz Current - Mode Control
• Operation Frequency Foldback Down to 26kHz and Skip - Cycle in Light Load Conditions
• Frequency Jittering in Normal and Frequency Foldback Modes
• Internal and Adjustable Over Power Protection (OPP) Circuit
• Auto - Recovery Over Voltage Protection (OVP) on the VCC Pin
• Internal and Adjustable Slope Compensation
• Internal Fixed 4 ms Soft - Start
• Auto - Recovery or Latched Short - Circuit Protection
• Pre - Short Ready for Latched OCP Version
• OVP/OTP Latch Input for Improved Robustness
• +300mA / - 500mA Source/Sink Drive Capability
• Improved Consumption
• Improved Reset Time in Latch State
• High Robustness and High ESD Capabilities