UC3855BDW Texas Instruments - Yeehing Electronics

Bipolar CCM PFC controller with 10.5V/10V UVLO and zero voltage transition, 0°C to 70°C

Pricing (USD)

Quantity	Unit Price
1 — 99	10.993
100 — 249	9.602
250 — 999	7.403
1,000 +	5.30

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Power Factor Correction - PFC
RoHS	Y
Switching Frequency	500 kHz
Minimum Operating Temperature	0 C
Maximum Operating Temperature	+ 70 C
Mounting Style	SMD/SMT
Package / Case	SOIC-20
Packaging	Tube
Features	> 750W Applications, Average Current Mode, Enable, OVP
Height	2.35 mm
Length	12.8 mm
Operating Temperature Range	0 C to + 70 C
Series	UC3855B
Type	Power Factor Correction IC
Width	7.52 mm
Brand	Texas Instruments
Moisture Sensitive	Yes
Product Type	PFC - Power Factor Correction
Factory Pack Quantity	25
Subcategory	PMIC - Power Management ICs
Unit Weight	0.020071 oz

For more information, please refer to datasheet

Documents

UC3855BDW Datasheet

More Information

The UC3855A/B provides all the control features necessary for high power, high frequency PFC boost converters. The average current mode control method allows for stable, low distortion AC line current programming without the need for slope compensation. In addition, the UC3855 utilizes an active snubbing or ZVT (Zero Voltage Transition technique) to dramatically reduce diode recovery and MOSFET turn-on losses, resulting in lower EMI emissions and higher efficiency. Boost converter switching frequencies up to 500kHz are now realizable, requiring only an additional small MOSFET, diode, and inductor to resonantly soft switch the boost diode and switch. Average current sensing can be employed using a simple resistive shunt or a current sense transformer. Using the current sense transformer method, the internal current synthesizer circuit buffers the inductor current during the switch on-time, and reconstructs the inductor current during the switch off-time. Improved signal to noise ratio and negligible current sensing losses make this an attractive solution for higher power applications.