Texas Instruments UC2855ADWTR

Name: UC2855ADWTR
Brand: Texas Instruments
SKU: 5198477-UC2855ADWTR
Availability: InStock
Rating: 5 (1 reviews)

Part Number:: UC2855ADWTR

Manufacturer:: Texas Instruments

Ventron No:: 5198477-UC2855ADWTR

Description:: High Performance Power Factor Preregulator

ECAD Model:

Datasheet:: UC2855, 3855A,B

Description

The UC2855ADWTR is High Performance Power Factor Preregulator , it is part of series. they are designed to work as Texas Instruments components.UC2855ADWTR with pin details manufactured by TI. The UC2855ADWTR is available in Package,it is part of the electronic component Chips.that includes Series. they are designed to operate as Texas Instruments components.it is with Operating Temperature .UC2855ADWTR with original stock manufactured by TI. The UC2855ADWTR is available in Package.Generally IC chips offer Mounting Style features such as SMD/SMT, Package Case of UC2855ADWTRis designed to work in , it's Operating Temperature is .The UC2855ADWTR is available in Package, is part of the Texas Instruments components and belong to Obsolete Integrated Circuits.UC2855ADWTR with EDA / CAD Models manufactured by TI. The UC2855ADWTR is available in Package, is part of the Obsolete Integrated Circuits.The UC2855ADWTR is Texas Instruments components with package manufactured by TI. The UC2855ADWTR is available in Package, is part of the High Performance Power Factor Preregulator.

UC2855ADWTR More Descriptions

Power Factor Correction (PFC) ICs High Performance Preregulator
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; Peak Reflow Compatible (260 C):No; Startup Current:0.15mA; Supply Current:17mA ;RoHS Compliant: Yes
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.

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