Description
UC2855BDW Texas Instruments - Yeehing Electronics
Bipolar CCM PFC controller with 10.5V/10V UVLO and zero voltage transition, –40°C to 85°C
Pricing (USD)
Quantity | Unit Price |
1 — 99 | 12.824 |
100 — 249 | 11.201 |
250 — 999 | 8.637 |
1,000 + | 5.41 |
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 | - 40 C |
Maximum Operating Temperature | + 85 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 | - 40 C to + 85 C |
Series | UC2855B |
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
UC2855BDW 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.