UCC28500DWTR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Mode:	Average Current
Frequency - Switching:	80kHz ~ 120kHz
Current - Startup:	150µA
Voltage - Supply:	9.7 V ~ 18 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	UCC28500

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UCC28500DWTR Application Field and Working Principle

Power Factor Correction (PFC) is an important part of power system design. It is used to regulate the load and maintain electrical load power factor at an acceptable level. The UCC28500DWTR is an integrated PFC controller from Texas Insturments. It offers a flexible PFC pre-regulation scheme to improves system performance, reduce system costs and simplify Power Supply Design.

Application Field

The UCC28500DWTR provides a variety of features for high-performance Power Supply designs. It is an ideal choice for AC-DC offline PFC applications, suitable for flyback, forward and half-bridge configurations. It Can be used in a wide range of applications, including Home appliances, computing, AV equipment, industrial and medical supplies and smart meters.

Working Principle

The UCC28500DWTR works by controlling the detailed shape of the input current waveforms in order to improve the input power factor and reduce harmonic distortion. It is a high frequency, voltage mode control device, with a 100 kHz operation frequency. It has a low-side current sensing and a multiplier to calculate its average power. A hysteretic comparator takes the input current information to determine the PFC output voltage.It also has features that reduce input power dissipation due to voltage drop. It provides cycle-by-cycle current limiting, over-voltage protection, frequency jittering and programmable auto-restart. Furthermore, the UCC28500DWTR also has an auxiliary supply for controlling external MOSFETs for applications with low power requirements.

Conclusion

The UCC28500DWTR is an integrated PFC controller from Texas Insturments. It provides unique PFC pre-regulation scheme to improves system performance and reduces distortion levels. It is suitable for flyback, forward and half-bridge configurations, and is well suited for a wide range of applications, including Home appliances, computing, AV equipment, industrial and medical supplies and smart meters.

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