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UC3855BDW The Texas Instruments UC3855BDW is a PFC controller IC designed for high power, high frequency boost converters. It utilizes average current mode control for stable operation.
Mfr Part #:

UC3855BDW

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3855BDW is a PFC controller IC designed for high power, high frequency boost converters. It utilizes average current mode control for stable operation.
✓ Total Stock: 5,442 pcs
$ Price Range: $0.75

UC3855BDW Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
3,600 pcs
On Request
3600 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,842 pcs
On Request
1842 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

UC3855BDW Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Bandwidth
Control Method
Current
Frequency
Mode
Mounting Type
Operating Temperature
Supplier Device Package
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UC3855BDW Description

Short technical summary and product information.

The UC3855BDW from Texas Instruments is a high-performance power factor preregulator designed for boost converters. It employs fixed frequency average current mode control, which minimizes line current distortion without requiring slope compensation. This controller is capable of operating at switching frequencies up to 500kHz, facilitated by a built-in active snubber (ZVT) that reduces losses and improves EMI.

 

The device features an inductor current synthesizer for single current transformer sensing, enhancing efficiency and noise margin. It includes an accurate analog multiplier with line compensation for universal input voltage operation. Key electrical specifications include a 7.5V, 1% precision reference voltage and a high bandwidth (5MHz) low offset current amplifier. Protection features include overvoltage and overcurrent comparators.

 

Packaged in a 20-SOIC (0.295", 7.50mm Width) surface mount package, the UC3855BDW operates within a temperature range of 0°C to 70°C. Its low startup supply current and UVLO with hysteresis make it suitable for various power supply designs requiring improved power factor correction.

UC3855BDW Quick Information

Product Type: PFC Controller
Series: UC3855B
Canonical Name: UC3855BDW High Performance Power Factor Preregulator
Subcategory: Power Factor Correction

UC3855BDW Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

UC3855BDW Estimated Pricing

Qty Low High
1+ $0.75 $0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

UC3855BDW Features

  • Controls boost PWM to near unity power factor.
  • Fixed frequency average current mode control.
  • Built-in active snubber (ZVT) allows operation to 500kHz.
  • Inductor current synthesizer for improved efficiency.
  • Overvoltage and overcurrent protection features.

UC3855BDW Applications

  • High power, high frequency PFC boost converters.
  • Applications requiring stable low distortion AC line current.
  • Designs needing reduced EMI emissions and higher efficiency.
  • Universal input voltage power supplies.

UC3855BDW FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3855BDW?

The UC3855BDW operates from 10.5V to 20V.

What package is the UC3855BDW available in?

The UC3855BDW is available in a 20-SOIC (0.295", 7.50mm Width) surface mount package.

What is the operating temperature range of the UC3855BDW?

The operating temperature range is 0°C to 70°C.

What is the switching frequency of the UC3855BDW?

The switching frequency is up to 500kHz.

What control mode does the UC3855BDW use?

The UC3855BDW uses average current mode control.

What is the reference voltage of the UC3855BDW?

The reference voltage is 7.5V with 1% accuracy.

What is the startup supply current of the UC3855BDW?

The startup supply current is typically 150µA.

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