Datasheet Texas Instruments UC2854ADWTR

Enhanced High Power Factor Preregulator 16-SOIC -40 to 85

Datasheets

PDF, 732 Kb, Revision: E, File published: Aug 25, 2006

Extract from the document

Lifecycle Status	Active (Recommended for new designs)
Manufacture's Sample Availability	No

Control Method	CCM
Device Type	Single-phase PFC
Operating Supply Current	12 mA
Operating Supply(Max)	20 V
Operating Temperature Range	-40 to 85 C
Package Group	SOIC
Package Size: mm2:W x L	16SOIC: 106 mm2: 10.3 x 10.3(SOIC) PKG
Peak Output Sink Current Gate Drive	1 A
Peak Output Source Current Gate Drive	-1 A
Practical Operating Frequency(Max)	0.2 MHz
Rating	Catalog
Special Features	> 750W Applications,Average Current Mode,Enable
Startup Current	0.25 mA
UVLO Thresholds On/Off	16/10 V

RoHS

Compliant

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Power supply applications using current sense transformers require a duty cycle clamp on the pulse width modulator (PWM) to ensure transformer reset. Not all PWMs come with a duty cycle clamp presenting a problem for the power supply designer. This application note shows how to implement a duty cycle clamp by using a simple delay circuit.

Series: UC2854A (6)

Semiconductors > Power Management > Offline and Isolated DC/DC Controllers and Converters > Power Factor Correction