UC2854BJ

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Texas Instruments

ENHANCED HIGH POWER FACTOR PREREGULATOR

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DocumentsDatasheet UCx854 High-Power Factor Preregulator datasheet (Rev. A)

UC2854BJ

Active

Texas Instruments

ENHANCED HIGH POWER FACTOR PREREGULATOR

Deep-Dive with AI

DocumentsDatasheet UCx854 High-Power Factor Preregulator datasheet (Rev. A)

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC2854BJ

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UC2854B-EP Series

Enhanced bipolar CCM PFC controller with 10.5V/10V UVLO for 50Hz-400Hz line freq., –40°C to 85°C

Part	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [x]	Package / Case	Package / Case [y]	Mounting Type	Supplier Device Package	Current - Startup	Voltage - Supply [Max]	Voltage - Supply [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Frequency - Switching	Package / Case	Package / Case
Texas Instruments UC2854BDWTRG4	85 °C	-40 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	250 µA	20 V	10 VDC	120 kHz	80 kHz
Texas Instruments UC2854ADWTR	85 °C	-40 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	250 µA	20 V	10 VDC			200 kHz
Texas Instruments UC2854ADW	85 °C	-40 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	250 µA	20 V	10 VDC			200 kHz
Texas Instruments UC2854BJ
Texas Instruments UC2854BMDWREPG4	125 °C	-55 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	300 µA	20 V	10 VDC	120 kHz	80 kHz
Texas Instruments UC2854AN	85 °C	-40 °C		16-DIP		Through Hole	16-PDIP	250 µA	20 V	10 VDC			200 kHz	0.3 in	7.62 mm
Texas Instruments UC2854DWTRG4	85 °C	-40 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	1.5 mA	30 VDC	14.5 V			200 kHz
Texas Instruments UC2854BN	85 °C	-40 °C		16-DIP		Through Hole	16-PDIP	250 µA	20 V	10 VDC	120 kHz	80 kHz		0.3 in	7.62 mm
Texas Instruments UC2854BDWG4	85 °C	-40 °C	0.295 in	16-SOIC	7.5 mm	Surface Mount	16-SOIC	250 µA	20 V	10 VDC	120 kHz	80 kHz
Texas Instruments UC2854BQG3	85 °C	-40 °C		20-LCC (J-Lead)		Surface Mount	20-PLCC (9x9)	250 µA	20 V	10 VDC	120 kHz	80 kHz

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	9	$ 36.39
Texas Instruments	TUBE	1	$ 44.26
		100	$ 38.66
		250	$ 29.81
		1000	$ 26.66

Description

General part information

UC2854B-EP Series

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.

A 1%, 7.5-V reference, fixed frequency oscillator, PWM, voltage amplifierwith soft-start, line voltage feedforward (VRMSsquarer), input supply voltage clamp, and over current comparator round out the lilst of feataures.

Available in the 16-pin N (PDIP), DW (SOIC Wide), and J (CDIP) and 20-pin Q (PLCC) package. See Ordering Information table for availability by temperature range.