恩智浦(NXP0带集成电源开关的AC-DC控制器 TEA1721DT,适用于5W且集成高功率MOS,TEA1721是一款小尺寸低成本开关电源（SMPS）控制器IC，适合低功率应用（最高5 W），可直接使用整流后的市电电源工作。该器件集成高压功率开关(700 V)，并针对反激转换器拓扑而优化，可在全负载范围内提高效率，空载功耗极低。该器件内置了启动电路，可直接采用整流后的市电电压启动，无需任何外部泄放电路。1270 Hz的打嗝频率可在高市电输入情况下实现低于22 mW的空载功耗。
NXP's AC-DC controller TEA1721DT with integrated power switch features:
- Low power switching power supply controller, suitable for applications with a maximum power of 5 W
Adopting a 700 V high-voltage power switch, suitable for operation under global mains power
The output voltage is controlled through primary detection, without the need for optocouplers or secondary feedback circuits
Minimize audio noise in various working modes to the greatest extent possible
Compliant with USB battery charging and Energy Star 2.0 standards
Equipped with frequency jitter function and lower EMI
No load power consumption below 22 mW
Provide energy-saving mode with extremely low power supply current consumption under no-load conditions
The current consumption of the built-in high-voltage starting circuit during normal switch operation is zero
Adopting SO7 packaging that is halogen-free and compliant with RoHS standards
The feedback control pin (FB) and power supply pin have overvoltage protection (OVP), which automatically restarts after protection
The IC power pin has undervoltage lockout (UVLO) protection function
Over temperature protection (OTP)
By reducing the peak current at zero and low output voltages, soft start is achieved
The demagnetization protection function ensures operation in discontinuous conduction mode
The feedback control (FB) pin has open circuit and short circuit protection functions - NXP AC-DC controller TEA1721DT with integrated power switch application:
White goods
Industry
smart meter
Mobile USB charger
universal adapter
