NCP12400BAHAB0DR2G

Series:	--
Part Status:	Active
Output Isolation:	Isolated
Internal Switch(s):	No
Voltage - Breakdown:	--
Topology:	Flyback
Voltage - Start Up:	12V
Voltage - Supply (Vcc/Vdd):	10.5 V ~ 28 V
Duty Cycle:	80%
Frequency - Switching:	65kHz
Fault Protection:	Over Load, Over Power, Over Temperature, Over Voltage
Control Features:	--
Operating Temperature:	-40°C ~ 125°C (TJ)

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Introduction to the NCP12400BAHAB0DR2G

The NCP12400BAHAB0DR2G is an integrated, offline switcher IC from ON Semiconductor that can serve as the primary side controller for power applications. It is a monolithic integrated circuit (MOS) switching regulator which can be used for various low power applications such as low power adapters, Front End Power Supplies (FEPs) and isolated power supplies. The NCP12400BAHAB0DR2G has an operating temperature range of -40℃ to +85℃, and comes in a small, low profile package (9mmx9mm surface mount).

Application Field and Working Principle of the NCP12400BAHAB0DR2G

The NCP12400BAHAB0DR2G is a full featured, low power AC/DC offline switching converter. Its main application field is in low power adapters, Front End Power Supplies (FEPs) and isolated power supplies. The NCP12400BAHAB0DR2G is designed for power levels up to 10W, and enables high-efficiency power conversion at low standby power levels. The device has various features that enable high efficiency and superior power output regulation.In terms of working principle, the NCP12400BAHAB0DR2G is an offline controller that uses fixed-on-time control. It has a PWM (pulse-width modulation) control circuit, which uses a charge-pump to generate the PWM. When current is drawn from the converter, the PWM turns on the switch and supplies power to the system. The PWM also increases the switching frequency in order to maintain the output power. The controller regulates the output voltage by continually adjusting the pulse width. The current sensing element built into the IC ensures a stable current control and allows for optimal system performance.In addition, the NCP12400BAHAB0DR2G provides short-circuit, over-voltage, over-current and over-temperature protection. It has an open-loop protection feature that reduces the output current and powers down the output for additional protection. The protection thresholds are adjustable and can be programmed with external components.

Conclusion

The NCP12400BAHAB0DR2G is an integrated, offline switcher IC designed for low power applications. It is a full featured, low power AC/DC offline switching converter suitable for low power adapters, Front End Power Supplies (FEPs) and isolated power supplies. The device uses fixed-on-time control and has a PWM control circuit that uses a charge-pump to generate the PWM. It also has short-circuit, over-voltage, over-current and over-temperature protection. The small size of the package and the adjustable protection thresholds give it great flexibility and make it an excellent choice for power applications.

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