UCC2809D-1

Duty Cycle:	70%
Base Part Number:	UCC2809-1
Mounting Type:	Surface Mount
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-55°C ~ 150°C (TJ)
Control Features:	Frequency Control, Soft Start
Fault Protection:	--
Frequency - Switching:	1MHz
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 19 V
Voltage - Start Up:	10V
Topology:	Boost, Flyback, Forward
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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Featuring one of Texas Instruments Incorporated’s most advanced power supply controller, the UCC2809D-1, this article will discuss the application fields and its working principles. The UCC2809D-1 is a one-chip power factor control (PFC) solution that fits seamlessly into an existing control topology and It is primarily used to generate power factor correction, mitigate harmonic currents and improve voltage regulation in power supplies and motor drives.It is used in many applications spanning a wide range of industries: power adapters, motor drivers, solar SPS, lighting, and alarm systems, to name a few. Moreover, this power supply device is built to meet global environmental standards, so it can be used in any environment.The UCC2809D-1 comes with many functional features, each of which adds value to its ability for high performance, regulation and compliance. Its control algorithm is designed to work with a variety of power supply configurations, delivering high efficiency, along with low EMI. Its synchronization options provide flexibility for switching frequency, and its functions include hill-climb energy management, open line protection and low standby mode power consumption for high power factor at light loads.It can also work with AC and DC power sources, making it suitable for offline switchers and converters. Additionally, its zero voltage switching (ZVS) functionality eliminates switching losses and helps to improve power efficiency, even at light load currents. For motor drives, its motor sense device can provide relatively high speed motor protection or a solution to enable load detection and monitoring.The UCC2809D-1 is powered by an internal 8-bit MSP430 microcontroller core. This microcontroller consumes a low quiescent current, enabling operation at low cost and low power levels. The MSP430 can provide up to 16K of program memory, making it suitable for complex control applications. Hardware design of the UCC2809D-1 is based on a two-stage, two-phase buck converter topology. The first stage consists of power factor correction with an active PFC converter and a single resonance inductor. The second stage comprises a full-bridge, buck-boost Buck/Boost converter with an external inductor for adjustment of output voltage. This topology is suitable for both offline converters and offline switchers applications.The control loop of the UCC2809D-1 adjusts the input currents in the active PFC converter so that their total harmonic distortion is kept below the required level, thereby improving power factor. The Buck/Boost converter adjusts the output voltage in the second stage, thus providing regulation. The MSP430 is used for regulation control and system limitation protection, and also provides interface functions such as UART and I2C.In summary, the UCC2809D-1 is an advanced power supply controller solution that fits into existing control topologies and can be used in a variety of applications. It features an integrated 8-bit MSP430 microcontroller, two-stage, two-phase buck converter topology, and many functional features including hill-climb energy management, open line protection, and low standby mode power consumption. It can be used for both offline converters and offline switchers, making it a flexible and powerful solution for power supplies and motor drives.

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