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UC3854DW ACTIVE

Bipolar CCM PFC controller supporting line freq. across 50Hz-400Hz range, 0°C to 70°C

Same as: UC3854DWG4   This part number is identical to the part number listed above. You can only order quantities of the part number listed above.

Inventory: 6,918
 

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
SOIC (DW) | 16 40 | TUBE
C (0 to 70)
Package | Pins SOIC (DW) | 16
Package qty | Carrier 40 | TUBE
Operating temperature range (°C) C (0 to 70)
View TI packaging information

Features for the UC3854

  • Control Boost PWM to 0.99 Power Factor
  • Limit Line-Current Distortion to < 5%
  • World-Wide Operation Without Switches
  • Feedforward Line Regulation
  • Average Current-Mode Control
  • Low Noise Sensitivity
  • Low Startup Supply Current
  • Fixed-Frequency PWM Drive
  • Low-Offset Analog Multiplier and Divider
  • 1-A Totem-Pole Gate Driver
  • Precision Voltage Reference

All trademarks are the property of their respective owners.

Description for the UC3854

The UC1854 provides active-power factor correction for power systems that otherwise woulddraw non-sinusoidal current from sinusoidal power lines. This device implements all the controlfunctions necessary to build a power supply capable of optimally using available power-line currentwhile minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, ananalog multiplier and divider, a current amplifier, and a fixed-frequency PWM.

In addition, the UC1854 contains a power MOSFET-compatible gate driver, 7.5-V reference,line anticipator, load-enable comparator, low-supply detector, and overcurrent comparator.

The UC1854 uses average current-mode control to accomplish fixed-frequency currentcontrol with stability and low distortion. Unlike peak current-mode, average current controlaccurately maintains sinusoidal line current without slope compensation and with minimal responseto noise transients.

The high reference voltage and high oscillator amplitude of the UC1854 minimize noisesensitivity while fast PWM elements permit chopping frequencies above 200 kHz. The UC1854 is usedin single-phase and three-phase systems with line voltages that vary from 75 V to 275 V and linefrequencies across the 50-Hz to 400-Hz range. To reduce the burden on the circuitry that suppliespower to this device, the UC1854 features low starting supply current.

These devices are available packaged in 16-pin plastic and ceramic dual in-line packages,and a variety of surface-mount packages.

Pricing


Qty Price (USD)
1-99 $2.689
100-249 $2.356
250-999 $1.652
1,000+ $1.331

Additional package qty | carrier options

Package qty | Carrier 2,000 | LARGE T&R
Inventory 53,715
Qty | Price (USD) 1ku | $1.126 1-99 $2.275 100-249 $1.993 250-999 $1.397 1,000+ $1.126
Custom reel may be available