Description
UC2854ADW Texas Instruments Power Factor Correction – PFC Enhanced High Power Factor Preregulator 200 kHz, SOIC-16 PFC PRE-REGULATOR, 35V, 16-SOIC
Part Specification:
- Start-up Supply Current : 300uA
- Switching Freq : 115kHz
- Operating Supply Voltage (Min) : 10V
- Operating Supply Voltage (Max) : 20V
- Operating Temp Range : -40C to 85C
- Operating Temperature Classification : Industrial
- Package Type : SOIC
- Packaging : Tube
- Pin Count : 16
- Mounting : Surface Mount
DESCRIPTION The UC3854A/B products are pin compatible enhanced versions of the UC3854. Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the AC input line current waveform to correspond to the AC input line voltage. To do this the UC3854A/B uses average current mode control. Average current mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current mode control. 7.5 V reference, fixed frequency oscillator, PWM, voltage amplifier with soft-start, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the list of features. Available in the 16-pin N (PDIP), DW (SOICWide), and J (CDIP) and 20-pin Q (PLCC) package. See ordering information on page 3 for availability by temperature range.
Manufacturer Part Number: UC2854ADW
Manufacturer: Texas Instruments
