NCP1252EDR2G

AC DC Converters, Offline Switchers Overview

The NCP1252EDR2G is a current mode PWM controller designed for AC-DC switching supplies, specifically targeting ATX power and forward applications. It operates with a fixed maximum duty cycle of 47.5% and supports a switching frequency up to 500 kHz. The device features an extended Vcc operating range from 9 V to 28 V with automatic recovery UVLO. It provides primary-side overload detection without auxiliary windings and includes lockout overcurrent protection with a 10 ms delay. The controller utilizes peak current mode control and is housed in an SOIC-8 package.

AC DC Converters, Offline Switchers Feature Summary

• Peak current mode control architecture
• Primary-side overload detection without auxiliary winding
• Lockout overcurrent protection with fixed delay
• Extended Vcc range with automatic recovery

AC DC Converters, Offline Switchers Applications

• ATX power supplies
• AC-DC adapters
• Forward converter applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix EDR2G against official onsemi documentation to confirm the 47.5% duty cycle limit and 10 ms overcurrent delay. Ensure compatibility with SOIC-8 mounting requirements. Cross-reference datasheet revisions to validate electrical parameters before integration into design specifications.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive designs requiring primary-side regulation capabilities. The fixed duty cycle and extended voltage range suit applications needing robust brown-out protection. Evaluate thermal performance within the SOIC-8 package constraints for high-frequency operation up to 500 kHz.

AC DC Converters, Offline Switchers Part Context

Part of the NCP1252 family of current mode PWM controllers. The E variant distinguishes itself through specific duty cycle limits and protection timing characteristics compared to other suffixes like A or B. Designed for reliable AC-DC conversion in compact form factors.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1252ADR2G shares similar topology but may differ in duty cycle limits and protection delays. Verify functional equivalence regarding the 47.5% max duty cycle and 10 ms lockout timing before substitution.