UC2855ADWTRG4

Mfr. #:: UC2855ADWTRG4
説明:: IC PFC CTRLR AVERAGE CURR 20SOIC
ライフサイクル:: メーカー新製品
データシート:: UC2855ADWTRG4 データシート
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詳しくは:: UC2855ADWTRG4 詳しくは UC2855ADWTRG4 Product Details

製品属性
属性値

Tags: UC2855AD, UC2855A, UC2855, UC285, UC28, UC2

Service Guarantees

We guarantee 100% customer satisfaction.

Quality Guarantees

We provide 90-360 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.
Our experienced sales team and tech support team back our services to satisfy all our customers.

we buy and manage excess electronic components, including excess inventory identified for disposal.
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Step1:
Vacuum Packaging with PL

Step2:
Anti-Static Bag

Step3:
Packaging Boxes

UC2855ADWTRG4 説明

***ser: Power Factor Correction (PFC) ICs High Performance Preregulator

***ark: Power Factor Controller IC; Frequency:0.5MHz; Supply Voltage Max:20V; Package/Case:20-SOIC; No. of Pins:20; Operating Temperature Range:-40°C to +85°C; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes ;RoHS Compliant: Yes

***as Instruments: 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. The UC3855A/B also features a single quadrant multiplier, squarer, and divider circuit which provides the programming signal for the current loop. The internal multiplier current limit reduces output power during low line conditions. An overvoltage protection circuit disables both controller outputs in the event of a boost output OV condition. Low startup supply current, UVLO with hysteresis, a 1% 7.5V reference, voltage amplifier with softstart, input supply voltage clamp, enable comparator, and overcurrent comparator complete the list of features. Available packages include: 20 pin N, DW, Q, J, and L.

Market price

モデル	説明	ストック	価格
UC2855ADWTRG4 DISTI # UC2855ADWTRG4-ND	IC PFC CTRLR AVERAGE CURR 20SOIC RoHS: Compliant Min Qty: 2000 Container: Tape & Reel (TR)	Limited Supply - Call
UC2855ADWTRG4 DISTI # 595-UC2855ADWTRG4	Power Factor Correction - PFC High Performance Preregulator RoHS: Compliant	0

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