NCP1216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

Housed in an SOIC-8 or DIP-7 package, the NCP1216 represents an enhanced version of NCP1200-based controllers. Due to its high drive capability, NCP1216 drives large gate-charge MOSFETs, which together with internal ramp compensation and built-in frequency jittering, ease the design of modern AC/DC adapters.With an internal structure operating at different fixed frequencies, the controller supplies itself from the high-voltage rail, avoiding the need of an auxiliary winding. This feature naturally eases the designer task in some particular applications, e.g. battery chargers or TV sets. Current-mode control also provides an excellent input audio-susceptibility and inherent pulse-by-pulse control. Internal ramp compensation easily prevents sub-harmonic oscillations from taking place in continuous conduction mode designs.When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at a user adjustable low peak current, no acoustic noise takes place.The NCP1216 features an efficient protective circuitry, which in presence of an overcurrent condition disables the output pulses while the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto-recovers.

特性 Features

No auxiliary winding operation
Current-mode control with adjustable skip-cycle capability
Internal ramp compensation
Built-in frequency jittering for better EMI signature
Auto-recovery internal output short circuit protection
Extremely low no-load standby power
500mA peak current capability
Fixed frequency versions at 65 kHz, 100 kHz, 133 kHz
Internal temperature shutdown
Direct optocoupler connection
SPICE models available for TRANsient and AC analysis
Pin-to-pin compatible with NCP1200 series
Internal 1ms Soft Start (A version Only)
Limited Duty Cycle to 50% (A Version Only)
Pb-Free packages are available

应用 Application

High power AC/DC converters for TVs, set-top boxes etc.Offline adapters for notebooksTelecom DC-DC convertersAll power supplies

简介

NCP1216属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP1216AC 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。