NCP1248AD065R2G

PMIC - AC DC Converters, Offline Switchers

The NCP1248AD065R2G is an integrated power MOSFET and current-mode pulse width modulation (PWM) controller that is specifically designed for an offline switch mode AC/DC power supply. It is a cost effective solution for electric components that are used for an offline-regulated power switch mode, as it has a wide input voltage window of up to 265VAC that helps ensure performance, even with harsh AC line conditions.

The NCP1248ADO65R2G is based on a current-mode PWM control system and features soft-start, primary sides over-voltage protection, cycle-by-cycle primary-side current limiting protection, and secondary-side high/low voltage protection. It also supports various standard protections, including primary-side single wire current sense, secondary-side universal serial bus (USB) or PMBus™ interface.

The PWM of the NCP1248AD065R2G is based on an oscillator without a frequency control pin that can be used to adjust the switching frequency. A recommended operating frequency range is 40kHz to 65kHz, but it can also be operated beyond this range.

The NCP1248AD065R2G also utilizes an optimized loop gain for improved system stability and ripple performance. The amplifier circuit was designed for precise level shift between the output of the comparator and the gate drive. As a result, the system is able to minimize oscillation problems and ensure fast dynamic load response.

The NCP1248AD065R2G can be used to power a wide range of load applications in both AC/DC and DC/DC power converter topologies. Examples include telecom supplies, LED lighting drivers, battery charger applications, and solenoid drivers.

In summary, the NCP1248ADO65R2G is an ideal power MOSFET and current-mode PWM controller for an offline switch mode AC/DC power supply. It can provide reliable operation with a wide input voltage range, fast dynamic load response, and various protections to ensure reliability.