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NCP1200D40R2 from ON,ON Semiconductor

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NCP1200D40R2

Manufacturer: ON, MOTOROLA

PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies

Partnumber Manufacturer Quantity Availability
NCP1200D40R2 ON, MOTOROLA 522 In Stock

Description and Introduction

PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies The **NCP1200D40R2** is a high-performance, fixed-frequency current-mode PWM controller designed for offline power supply applications. This integrated circuit (IC) is engineered to deliver efficient and reliable power conversion, making it suitable for a variety of AC-DC power supplies, including adapters, auxiliary power sources, and standby circuits.  

Operating at a fixed frequency of 40 kHz, the NCP1200D40R2 ensures stable switching performance while minimizing electromagnetic interference (EMI). Its current-mode control architecture enhances transient response and simplifies loop compensation, contributing to improved system reliability. The IC features an integrated high-voltage startup circuit, reducing external component count and lowering overall system costs.  

Key attributes include built-in brownout protection, overvoltage protection (OVP), and a latch function for fault conditions, ensuring safe operation under adverse conditions. The device also incorporates a skip-cycle mode at light loads, enhancing efficiency across varying power demands.  

With its compact SOIC-8 package, the NCP1200D40R2 is well-suited for space-constrained designs. Its robust performance, combined with essential protection features, makes it a dependable choice for designers seeking a cost-effective, high-efficiency power management solution.

Application Scenarios & Design Considerations

PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies

Alternative Part Number

  • UC3842BD1R2G --: Industry-standard current-mode PWM controller in SOIC-8, widely used as a functional substitute for offline flyback designs; different series name and well-stocked.
  • SG6848D --: Current-mode PWM controller for offline SMPS with comparable drive and protection features, available in SOIC-8 and commonly used to replace NCP1200-class parts.
  • OB2263MP --: Low-cost current-mode PWM controller for offline flyback converters with similar pin function and power range, a common cross-reference for NCP1200 designs.
  • UC3845BD1R2G --: Widely available current-mode PWM controller in SOIC-8, functionally similar to the NCP1200 for offline flyback designs and easy to source.
  • OB2263AP --: Cost-effective current-mode PWM controller commonly used in low-power flyback supplies, pin-compatible class alternative for NCP1200 applications.

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