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TEXAS INSTRUMENTS  UC3854BDW  PFC PRE-REGULATOR, 35V, 16-SOIC

TEXAS INSTRUMENTS UC3854BDW
Technical Data Sheet (10.07KB) EN See all Technical Docs

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Product Overview

The UC3854BDW is an enhanced high Power Factor Preregulator provides all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac input line current waveform to correspond to the ac input line voltage. To do this the UC3854B uses average current-mode control. Average current-mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current-mode control. It is improved upon the UC3854 by offering a wide bandwidth, low offset current amplifier, a faster responding and improved accuracy enable comparator, a VREF GOOD comparator, UVLO threshold options (16/10V for offline, 10.5/10V for startup from an auxiliary 12V regulator), lower startup supply current and an enhanced multiply/divide circuit.
  • Controls boost PWM to near-unity power factor
  • Limits line current distortion to <3%
  • World-wide operation without switches
  • Accurate power limiting
  • Fixed-frequency average current-mode control
  • Low-offset current amplifier
  • Integrated current- and voltage-amplifier output clamps
  • Faster and improved accuracy ENABLE comparator
  • Green product and no Sb/Br
Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

 

Product Information

UVLO:
10.5V
Supply Voltage Min:
10V
Supply Voltage Max:
20V
Startup Current:
250µA
Operating Supply Current:
12mA
Controller IC Case Style:
SOIC
No. of Pins:
16Pins
Duty Cycle (%):
95%
Frequency:
200kHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Each
Product Range:
-
MSL:
MSL 2 - 1 year
Supply Voltage Range:
10V to 20V
SVHC:
No SVHC (15-Jun-2015)
Digital IC Case Style:
SOIC

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Applications

  • Power Management;
  • Industrial

Legislation and Environmental

Moisture Sensitivity Level:
MSL 2 - 1 year
Product Traceability
RoHS Compliant:
Yes
Authorized Distributor

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