描述 Description

The NCP1030 and NCP1031 are a family of miniature high-voltage monolithic dc-dc converters with on-chip power switch and start-up circuits. The NCP103x family incorporates in a single IC all the active power, control logic and protection circuitry required to implement, with minimal external components, several switching regulator applications, such as a secondary side bias supply or a low power dc-dc converter.This controller family is ideally suited for 48 V telecom, 42 V automotive, 12 V input and Power Over Ethernet (PoE) applications. The NCP103x can be configured in any single-ended topology such as forward or flyback. The NCP1030 is targeted for applications requiring up to 3 W, and the NCP1031 is targeted for applications requiring up to 6 W.The internal error amplifier allows the NCP103x family to be easily configured for secondary or primary side regulation operation in isolated and non-isolated configurations. The fixed frequency oscillator is optimized for operation up to 1 MHz and is capable of external frequency synchronization, providing additional design flexibility. In addition, the NCP103x incorporates individual line undervoltage and overvoltage detectors, cycle by cycle current limit and thermal shutdown to protect the controller under fault conditions. The preset current limit thresholds eliminate the need for external sensing components.

特性 Features

? On Chip High 200 V Power Switch Circuit and Startup Circuit
? No external circuitry needed for high voltage start up
? External Frequency Synchronization up to 1 MHz
? Optimization of switching frequency for size and efficiency
? Internal Startup Regulator with Auxiliary Winding Override
? Smaller PCB footprint
? Trimmed 2% Internal Reference
? Accurate output voltage
? Line Under/Over Voltage Lockout
? System level protection
? Internal Error Amplifier
? Smaller PCB footprint
? Primary or Secondary Regulation
? Flexibility in implementation
? Cycle by Cycle Current Limit
? Over Temperature Protection
? Excel Based Design Tool Available

應(yīng)用 Application

? Stand Alone Low Power dc−dc Converter
? Low Power Bias Supply
? Low Power Boost Converter
? POE (Power Over Ethernet)/PD. Refer to Application Note AND8247.
? Secondary Side Bias Supply for Isolated dc-dc Converters

簡介

NCP1030屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由制造生產(chǎn)的NCP1030AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來實現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。