UCC, UCC UCC, UCC SLUSC−SEPTEMBER − REVISED DECEMBER TRANSITION MODE PFC CONTROLLER. 1 . UCCP IC PFC CTLR TRANS-MODE 8-DIP Texas Instruments datasheet pdf data sheet FREE from Datasheet (data sheet) search for. Details, datasheet, quote on part number: UCC Part family, UCC PFC Controller for low to medium power applications requiring compliance with.

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Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI.

Products conform to specifications per the terms of Texas Instruments standard warranty. In order to choose the compensator dynamics, determine the maximum allowable loop gain at twice the line frequency and solve for capacitor CV2.

This translates to a minimum switching frequency of 5 kHz. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. This drawing is subject to change without notice.

(PDF) UCC28051 Datasheet download

Production processing does not necessarily include testing of all parameters. The clamp has the sink and source capability of 10 mA. The slew rate enhancement circuitry datasehet the gM amplifier that is activated during overvoltage conditions slews the COMP pin to about 2.

The voltage acts as one of the inputs to the internal multiplier. The gate drive output for an datasheef boost switch. As shown in Figure 1, the switch current is compared to the reference signal output of the multiplier directly. All linear dimensions are in inches millimeters. An internal rail of 7.


Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection OVP and enable. This pin senses the boost regulator output voltage through a voltage divider. Transition Mode Control The boost converter, the most common topology used for power factor correction, can operate in two modes — continuous conduction code CCM and discontinuous conduction mode DCM. Be sure to connect a 0.

Body dimensions do not include mold flash or protrusion, not to exceed 0. Important Information and Disclaimer: Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Product device recommended for new designs. Add a current limiting resistor, RZC, to keep the maximum current below 1 mA.

TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

The largest gain occurs at maximum line voltage. This pin senses the instantaneous switch current in the boost switch and uses it as the internal 288051 for PWM comparator. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications.

IC datasheet pdf-ucc,pdf datasheet (TRANSITION MODE PFC CONTROLLER)_百度文库

Voltage Loop Design How well datazheet voltage control loop is designed directly impacts line current distortion. This prevents the output dc voltage from going above 7. Samples may or may not be available. The filtering requirement is not severe and therefore is not a disadvantage. The rising edge threshold of the ZCD comparator can be as high as 2.


Datasheet, PDF – Alldatasheet

The internal active clamp circuitry prevents the voltage from going to a negative or a high positive value. The UCC and UCC, while being pin compatible with other industry controllers providing similar functionality, offer many feature enhancements and tighter specifications, leading to an overall reduction in system implementation cost. The system performance is enhanced by incorporation of zero power detect function which allows the controller output to shut down at light load conditions without running into overvoltage.

The bias winding can provide the necessary voltage. Information of third parties may be subject to additional restrictions. The enable comparator ensures that the controller is off if the feedback sense path is broken datashest if the input voltage is very low.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair datashset deceptive business practice. This output is capable of delivering up to mA peak currents during turn-on and turn-off. The diode selection is based on reverse voltage, forward current, and switching speed.