UCC28910D

Duty Cycle:	--
Base Part Number:	UCC28910
Mounting Type:	Surface Mount
Supplier Device Package:	7-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width), 7 Leads
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	--
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	9.5W
Frequency - Switching:	420Hz ~ 115kHz
Series:	--
Voltage - Supply (Vcc/Vdd):	6.5 V ~ 30 V
Voltage - Start Up:	9.5V
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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Introduction

UCC28910D is a high voltage and wide range of input voltage offline power factor corrector (PFC) designed for off-line AC/DC applications including light bulbs, LED lighting, AC adapters, lighting ballasts, and ceiling fans. As an integrated step-down PFC controller, the UCC28910D provides comprehensive protection features and precision current/power control with high performance.

Application Field

The UCC28910D offers several features and benefits to AC/DC design engineers and system integrators. It has good power factor correction and wide input voltage range, enabling systems to meet local energy legislation and voltage requirements. With built-in digital dimming, the UCC28910D offers optimized dimming dim efficiency, without the need for an external microcontroller. The UCC28910D also offers safety features such as over-current protection, over-temperature protection, and short-circuit protection, which provide consistent high power factor, improved system reliability and additional cost savings.The UCC28910D can also be used in lighting ballasts, where it provides power factor correction, dimming control and several other key features. Applications such as these can benefit from the UCC28910D\'s wide input voltage range and precision dimming, as well as its safety features.

Working Principle

The UCC28910D uses a high power MOSFET as a switch in the power conversion process. The controller regulates the switch\'s duty cycle to maintain a constant output voltage. The voltage is regulated by PWM dimming or analog dimming using an external potentiometer. The UCC28910D has a digital dimmer, which is a special digital circuit, and can be used to control the LED lighting system\'s brightness, color and power. The dimmer circuit can be used for both linear and PWM dimming, and it is controlled with an external digital signal, such as an I2C bus. The UCC28910D includes a soft-start circuit, which provides a smooth start-up without the need for an external soft start circuit. This ensures smoother dimming and eliminates the power spikes that can occur when using an external soft start circuit. The UCC28910D also offers comprehensive protection features, including over-current protection, over-temperature protection, and short-circuit protection. This ensures consistent high power factor and improved system reliability, which helps to reduce system costs.

Conclusion

The UCC28910D is an integrated and high performance switch mode power factor correction (PFC) controller with digital dimming, which enables system designers to meet stringent energy requirement and wide input voltage range with consistent high power factor, improved reliability and cost savings. It is widely used in AC/DC applications including light bulbs, LED lighting, AC adapters, lighting ballasts and ceiling fans. The UCC28910D has comprehensive protection features such as over-current protection, over-temperature protection and short circuit protection, which ensures consistent high power factor, improved system reliability and additional cost savings.

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