E-UC2844BN

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The E-UC2844BN is a two phase interleaved power factor corrector with primary side feedback. It is designed to meet the requirements of residential and light commercial applications, featuring an internal HVIC driver and primary side regulation. This allows it to achieve high power density and reduced complexity.

The key feature of this IC is the primary side regulation, it can sense the output voltage and adjust the AC input energy accordingly, allowing it to achieve high efficiency and a faster transient response. The ACDC converter has integrated short-circuit protection, over-temperature protection and soft-start features.

The IC has a wide input voltage range from 85-285VAC with adjustable output voltages from 8-38V. It has a peak current mode control, allowing it to drive high-frequency switching and can deliver up to 25W of output power. Additionally, it has low startup current and excellent line and load regulation. It also has a wide operating temperature range (-40 to 105°C) suitable for a variety of applications.

The E-UC2844BN is ideal for applications such as light bulbs, air conditioners, furniture, kitchen appliances, and domestic appliances. It is a compact and cost-effective solution that provides higher efficiency and power density than off-line switchers.

Working Principle

The E-UC2844BN controls a single-stage half-bridge converter to achieve high-efficiency. It uses a critical conduction mode operation allowing it to quickly respond to changes in the line voltage, input current and output voltage. The current-mode control gives it the ability to handle large load transients and to maintain a stable power supply.

The IC contains an internal driver, allowing it to be driven directly from the primary side controller. It also contains a regulated voltage reference for setting the output voltage. Additionally, the feedback circuit enables it to monitor the output voltage and dynamically adjust the input current.

The internal safety features, such as over-temperature protection, short-circuit protection and soft-start, allow the device to be used in a variety of applications. Moreover, the IC can automatically enter the low power (standby) mode when the output voltage is below a certain threshold.

In conclusion, the E-UC2844BN is an ideal solution for residential and light commercial applications as it provides excellent performance, efficiency and low cost. It also offers a wide range of features and safety functions that make it suitable for a variety of applications.

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