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NCP1055 Datasheet PDF

Part Series:NCP1055 Series
Description:Monolithic High Voltage Gated Oscillator Power Switching Regulator
Document:NCP1055P44 Datasheet PDF (32 Pages)

NCP1055 Datasheet PDF

NCP1055 Datasheet PDF

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NCP1055 - ON Semiconductor Function Overview

The NCP1050 through NCP1055 are monolithic high voltage regulators that enable end product equipment to be compliant with low standby power requirements. This device series combines the required converter functions allowing a simple and economical power system solution for office automation, consumer, and industrial products. These devices are designed to operate directly from a rectified AC line source. In flyback converter applications they are capable of providing an output power that ranges from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V, and 3.0 W to 20 W with a variable AC input that ranges from 85 V to 265 V. This device series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer, fault logic with a programmable timer for converter overload protection, unique gated oscillator configuration for extremely fast loop response with double pulse suppression, power switch current limiting, input undervoltage lockout with hysteresis, thermal shutdown, and auto restart fault detection. These devices are available in an economical 8-pin dual-in-line package.
Features
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Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding
Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications
Converter Output Overload and Open Loop Protection
Auto Restart Fault Protection
IC Thermal Fault Protection
Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response
Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI
Low Power Consumption Allowing European Blue Angel Compliance
On–Chip 700 V Power Switch Circuit and Active Startup Circuit
Rectified AC Line Source Operation from 85 V to 265 V
Input Undervoltage Lockout with Hysteresis
Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz
Pb-Free Packages are Available
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