NCP1236BD100R2G

AC DC Converters, Offline Switchers Overview

The NCP1236BD100R2G is a current-mode PWM controller from onsemi designed for flyback converters. It operates with a fixed switching frequency of 100 kHz and supports a maximum duty cycle of 85%. The device features a supply voltage range up to 28 V and provides an output drive current of 500 mA. It is housed in a surface-mount SOIC-7 package, measuring 5 mm by 4 mm with a height of 1.5 mm. The component functions within a temperature range of -40°C to +125°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage startup circuitry to eliminate external start-up resistors
• Includes built-in current mode control with cycle-by-cycle peak current limiting
• Features automatic restart mechanism for overload protection

AC DC Converters, Offline Switchers Applications

• Flyback AC-DC power supplies
• LED driver circuits
• Offline converter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the manufacturer marking and lot code against official onsemi documentation to confirm authenticity. Ensure the part number suffix matches the specific frequency variant required for the design. Cross-reference the datasheet revision date with the manufacturing date code to ensure compliance with current specifications.

AC DC Converters, Offline Switchers Selection Notes

Select this component when a fixed 100 kHz switching frequency is required for flyback topologies. It is suitable for applications needing integrated overcurrent protection and high-voltage startup capabilities without external bias components. Confirm that the SOIC-7 package dimensions fit the PCB layout constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1236 series of current-mode PWM controllers. It shares functional similarities with other variants in the family but differs in its fixed operating frequency specification. The series is engineered for cost-effective and compact offline power supply implementations.

AC DC Converters, Offline Switchers Replacement Considerations

NCP1236AD100R2G

AC DC Converters, Offline Switchers FAQ

What is the switching frequency of the NCP1236BD100R2G?

The device operates at a fixed switching frequency of 100 kHz.

Does this controller require an external start-up resistor?

No, it integrates a high-voltage start-up circuit that eliminates the need for an external start-up resistor.