NCP1028数据手册集成电路（IC）的ACDC转换器离线开关规格书PDF

描述 Description

The NCP1028 offers a new solution targeting output power levels from a few watts up to 15W in a universal mains flyback application.Our proprietary high-voltage technology lets us include a power MOSFET together with a startup current source, all directly connected to the bulk capacitor. To prevent lethal runaway in low input voltage conditions, an adjustable brown-out circuitry blocks the activity until sufficient input level is reached.Current-mode operation together with an adjustable ramp compensation offers superior performance in universal mains applications.Protection wise, a timer detects an overload or a short-circuit and stops all operations, ensuring a safe auto-recovery, low duty cycle burst operation. An integrated, auto-recovery.Finally, a great RDS(on) figure makes the circuit anexcellent choice for standby/auxiliary offline power supplies or applications requiring higher output power levels.

特性 Features

Skips cycles on low power demand
Provides improved efficiency at light loadsNo acoustic noise
Short circuit protection independent of the AUX winding
Efficient protective circuitryEase the design
Overpower protection
Effect of the input voltage variation on the max power delivered is compensated
Built-in 700 V MOSFET with Typical RDS(on) of 5.8 , Tj = 25C
Fixed Peak Current of 800 mA
Internal Current Source for Clean and Lossless Startup Sequence
Programmable Brown-Out Input for Low Input Voltage Detection
Input to Permanently Latchoff the Part
Internal Frequency Jittering for Improved EMI Signature
No-Load Input Standby Power of 85 mW @ 265 Vac
500 mW Loaded, Input Power of 715 mW @ 230 Vac
Programmable Over Power Protection
Medium Power AC-DC power supply for CE apparatus

应用 Application

Medium Power AC-DC Adapters for ChargersAuxiliary power supply
Desktop PCFlat TVsDVD, STB

简介

NCP1028属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP1028AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。