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NCP1246ALD065R2G Application Field and Working Principle

A growing number of consumer and industrial applications are relying on the NCP1246ALD065R2G for reliable and efficient power supplies. The NCP1246 is a monolithic integrated dual channel flyback controller from ON Semiconductor which can deliver up to 100 watts of power. With internal slope compensation and a safety timer, the NCP1246ALD065R2G is designed to meet the demanding requirements of cost sensitive industrial and telecom applications.

Application Field

The NCP1246ALD065R2G is ideal for cost sensitive systems with multiple power supplies. It is used in Telecom, Computer and Network Infrastructure, Set Top Box and other Consumer Electronics, HVAC, Automotive, and White Goods applications.

The flyback design of the NCP1246ALD065R2G allows the transformer to be located outside the device itself, allowing for a more efficient design. The NCP1246 utilizes a primary side voltage target control, allowing for a simpler system design. The two integrated channels can share a single primary side MOSFET for up to 100W applications. It is optimized for improved efficiency and long-term reliability, and is also compatible with low cost Opto-couplers.

Working Principle

The NCP1246ALD065R2G is a monolithic integrated dual channel flybackcontroller from ON Semiconductor that can deliver up to 100 watts of power. It consists of two separate power supply channels with independent primary side MOSFET, primary side voltage target control, output voltage feedback, and cycle-by-cycle primary current limit.

The NCP1246ALD065R2G has an internal 1000kHz oscillator, a frequency period adjust pin, and an enable and disable pin. The frequency of the oscillator is adjusted by the frequency period adjust pin, while the enable and disable pins are used to switch the NCP1246ALD065R2G on and off. The NCP1246ALD065R2G also includes an internal slope compensation for improved efficiency, which eliminates the need for an external slope compensation component.

The NCP1246ALD065R2G is protected from damage by internal circuitry, including an output voltage feed-forward, an integrated safety timer, a primary current limit, a soft start and a reset. The integrated safety timer ensures that the NCP1246ALD065R2G will shut down in the event of a short circuit, while the primary current limiter ensures that the system will not become overloaded. The output voltage feed-forward ensures that the correct output voltage is maintained even under varying loads or input voltages. The soft start feature allows the NCP1246ALD065R2G to start up from a cold start without any pulse skipping, ensuring a reliable and stable start-up. Finally, the reset pin allows for a quick recovery from any fault conditions and also allows for a quick shut down of the NCP1246ALD065R2G.

The NCP1246ALD065R2G is an excellent choice for a wide array of cost in-sensitive applications, allowing for reliable and efficient power supplies. With its extended feature set, the NCP1246ALD065R2G is the perfect solution for the most demanding requirements.

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