NCP1360集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

NCP1360属于集成电路（IC）的ACDC转换器离线开关。由安森美半导体公司制造生产的NCP1360AC 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。

The NCP1360/65 offers a new solution targeting output power

levels from a few watts up to 20 W in a universal−mains flyback

application. Thanks to a novel method this new controller saves the

secondary feedback circuitry (opto−coupler and TL431 reference)

while achieving excellent line and load regulation.

The NCP1360/65 operates in valley−lockout quasi−resonant peak

current mode control mode at nominal load to provide high efficiency.

When the secondary−side power starts diminishing, the switching

frequency naturally increases until a voltage−controlled oscillator

(VCO) takes the lead, synchronizing the MOSFET turn−on in

a drain−source voltage valley. The frequency is thus reduced by

stepping into successive valleys until the number 4 is reached. Beyond

this point, the frequency is linearly decreased in valley−switching

mode until a minimum is hit. This technique keeps the output in

regulation with the tiniest dummy load. Valley lockout during the first

four drain−source valleys prevents erratic discrete jumps and provides

good efficiency in lighter load situations.

特性 Features

• Primary−Side Feedback Eliminates Opto−coupler and TL431

Reference

• ±5 Voltage Regulation

• ±10 Current Regulation

• 560 V Startup Current Source

• No Frequency Clamp, 80 or 110 kHz Maximum Switching

Frequency Options

• Quasi−Resonant Operation with Valley Switching Operation

• Fixed Peak Current & Deep Frequency Foldback @ Light Load

Operation

• External Constant Voltage Feedback Adjustment

• Cycle by Cycle Peak Current Limit

• Build−In Soft−Start

• Over & Under Output Voltage Protection

• Cable Drop Compensation (None, 150 mV, 300 mV or 450 mV

Option)

• Wide Operation VCC Range (up to 28 V)

• Low Start−up Current (2.5 A typ.) with

NCP1360

• Clamped Gate−drive Output for MOSFET

• CS & Vs/ZCD pin Short and Open

Protection

• Internal Temperature Shutdown

• Less than 10 mW No−Load Performance

at High Line with NCP1365 Version

• Less than 30 mW No−Load Performance

at High Line with NCP1360 Version

• These are Pb−Free Devices

Typical Applications

• Low Power ac−dc Adapters for Chargers.

• Ac−dc USB chargers for Cell Phones,

Tablets and Cameras