NCP1217AP100G

AC DC Converters, Offline Switchers Overview

The NCP1217AP100G is an enhanced PWM current-mode controller designed for high-power universal off-line supplies. It operates with a fixed switching frequency of 133 kHz and supports a maximum duty cycle of 50%. The device integrates a high-voltage startup circuit, allowing direct connection to the main DC bus without external resistors. It features adjustable current limit threshold via an external resistor and includes protection mechanisms such as undervoltage lockout, thermal shutdown, and open-loop protection.

AC DC Converters, Offline Switchers Feature Summary

• Integrated high-voltage startup circuit eliminates the need for external biasing resistors
• Fixed 133 kHz switching frequency reduces electromagnetic interference
• Current-mode control architecture ensures stable operation across wide input voltage ranges

AC DC Converters, Offline Switchers Applications

• High-power universal off-line power supplies
• Flyback converter designs for AC-DC adapters
• Industrial power supply systems requiring robust current-mode control

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any functional updates. Ensure storage conditions comply with moisture sensitivity level requirements. Validate part marking against official onsemi identification standards.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for applications requiring fixed-frequency current-mode control in high-power off-line topologies. Consider the integrated startup feature for simplified bias network design. Evaluate thermal management needs due to internal power dissipation. Compare with NCP1216 series if variable frequency operation is preferred.

AC DC Converters, Offline Switchers Part Context

Part of the NCP12XX family of current-mode PWM controllers from onsemi. Designed specifically for high-power universal off-line applications. Shares architectural similarities with NCP1216 but offers enhanced features including fixed frequency operation and improved startup integration.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1216AP100G serves as a compatible alternative within the same product family. Verify pin compatibility and functional equivalence before substitution. Review datasheet differences regarding frequency stability and startup characteristics.