NCP1602AFCSNT1G

Overview

The NCP1602AFCSNT1G is an enhanced, high-efficiency power factor controller manufactured by onsemi. It is designed for continuous conduction mode (CCM) boost power factor correction (PFC) applications. The device integrates a high-voltage current source to eliminate external startup components and features a programmable frequency control pin. It supports critical conduction mode (CrCM) operation for light-load efficiency improvements. The controller includes comprehensive protection mechanisms such as overvoltage, undervoltage, and thermal shutdown.

Feature Summary

• Integrates a high-voltage current source for simplified startup circuitry
• Supports both CCM and CrCM operation modes for optimized efficiency across load ranges
• Features programmable switching frequency via an external resistor
• Includes built-in protection against overvoltage, undervoltage, and thermal events

Applications

• AC-DC adapters for consumer electronics
• Power supplies for computer peripherals
• Chargers for mobile devices and batteries
• General-purpose offline power factor correction stages

Procurement Notes

Verify the complete part number including suffixes such as AFCSNT1G to ensure correct tape-and-reel packaging and temperature grade. Confirm that the ordering part number matches the specific revision required for your design. Cross-reference with official onsemi documentation to validate compliance status and recommended operating conditions before finalizing procurement.

Selection Notes

Select this component for designs requiring high power factor correction in CCM or CrCM topologies. Ensure the input voltage range and output power requirements align with the controller's capabilities. Consider the external component values for frequency setting and compensation network stability. Verify that the package type fits the available PCB space and thermal management strategy.

Part Context

The NCP1602 belongs to onsemi's family of enhanced power factor controllers. It is often used in conjunction with external MOSFETs and diodes to build efficient PFC stages. Similar parts in the series include the NCP1611 and NCP1612, which may offer different feature sets or performance characteristics for varying power levels.

Replacement Considerations

Direct replacements may include other onsemi PFC controllers like the NCP1611 or NCP1612, provided pin compatibility and electrical specifications match. Verify functional equivalence and parameter limits before substitution. Consult official datasheets for detailed comparison of features and operating conditions.