Name: UC3854 High Power Factor Preregulator IC - ComponentsTree.com
SKU: CTT9NLD
Price: 189.60 INR
Availability: InStock

UC3854 High Power Factor Preregulator IC

The UC3854 is a high-performance Power Factor Correction (PFC) controller IC, designed by Texas Instruments, used to achieve near-unity power factor and tight output voltage regulation in AC-to-DC converter systems. It implements average current mode control, ensuring sinusoidal input current in phase with the input voltage — dramatically improving power efficiency and reducing harmonic distortion (THD).

Widely used in off-line switching power supplies, industrial equipment, and computer power systems, the UC3854 integrates all the necessary control and protection features to build an efficient boost-type PFC pre-regulator stage.

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Features:-

Control Boost PWM to 0.99 Power Factor
Limit Line-Current Distortion to < 5%
World-Wide Operation Without Switches
Feed forward Line Regulation
Average Current-Mode Control
Low Noise Sensitivity
Low Startup Supply Current
Fixed-Frequency PWM Drive
Low-Offset Analog Multiplier and Divider
1-A Totem-Pole Gate Driver
Precision Voltage Reference

Specifications:-

Parameter		Min	Max	Unit
Supply Voltage	VCC		35	V
Input Voltage	VSENSE, VRMS		11
	ISENSE, MULTOUT		11
	PKLMT		5
Gate driver current Input current	50% duty cycle		1.5	A
Gate driver current Input current	Continuous		0.5	A
Input current	RSET, IAC, PKLMT, ENA		10	mA
Power dissipation			1	W
Storage temperature, Tstg		-65	150	°C