Description:

The NCP1271 controller ( NCP1271A , NCP1271B ) allows for excellent stand by power consumption by use of its adjustable Soft-Skip mode and integrated high voltage startup FET. This proprietary Soft-Skip also dramatically reduces the risk of acoustic noise. This allows the use of inexpensive transformers and capacitors in the clamping network. Internal frequency jittering, ramp compensation, timer-based fault detection and a latch input make this controller an excellent candidate for converters where ruggedness and component cost are the key constraints.

ON NCP1271B 1271B NCP1271 Soft-Skip Mode Standby PWM Controller with Adjustable Skip Level and External Latch Features:

Fixed-Frequency Current-Mode Operation with Ramp Compensation and Skip Cycle in Standby Condition
Timer-Based Fault Protection for Improved Overload Detection
Soft-Skip Mode Technique for Optimal Noise Control in Standby
Internal High-Voltage Startup Current Source for Lossless Startup
5% Current Limit Accuracy over the Full Temperature Range
Adjustable Skip Level
Internal Latch for Easy Implementation of Overvoltage and Overtemperature Protection
Frequency Jittering for Softened EMI Signature
+500 mA / -800 mA Peak Current Drive Capability
Sub-100 mW Standby Power can be Achieved
Pin-to-Pin Compatible with the Existing NCP120X Series
This is a Pb-Free Device
Manufacturer : ON
Part Number : 1271A, NCP1271A , NCP1271, NCP1271D65R2G
Package : SOIC-7
For NCP1271 : NCP1271A for 65 KHz, NCP1271B for 100 KHz

Application:

AC-DC Adapters for Notebooks, LCD Monitors
Offline Battery Chargers
Consumer Electronic Appliances STB, DVD, DVDR

Package included:

• 1 X ON NCP1271B 1271B NCP1271 Soft-Skip Mode Standby PWM Controller with Adjustable Skip Level and External Latch