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TEXAS INSTRUMENTS  UC3854N  PFC PRE-REGULATOR, 35V, DIP-16

TEXAS INSTRUMENTS UC3854N
Technical Data Sheet (308.15KB) EN See all Technical Docs

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Product Overview

The UC3854N is a High Power Factor Preregulator that provides active power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, it contains a voltage amplifier, an analogue multiplier/divider, a current amplifier and a fixed-frequency PWM. In addition, the UC3854 contains a power MOSFET compatible gate driver, 7.5V reference, line anticipator, load-enable comparator, low-supply detector and over-current comparator. The UC3854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients.
  • Control boost PWM to 0.99 power factor
  • Limit line current distortion to <5%
  • World-wide operation without switches
  • Feed-forward line regulation
  • Average current-mode control
  • Low noise sensitivity
  • Low start-up supply current
  • Fixed-frequency PWM drive
  • Low-offset analogue multiplier/divider
  • 1A Totem-pole gate driver
  • Precision voltage reference
  • Green product and no Sb/Br

 

Product Information

UVLO:
16V
Supply Voltage Min:
15V
Supply Voltage Max:
35V
Startup Current:
1.5mA
Operating Supply Current:
10mA
Controller IC Case Style:
DIP
No. of Pins:
16Pins
Duty Cycle (%):
95%
Frequency:
200kHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Each
Product Range:
-
MSL:
-
Supply Voltage Range:
15V to 35V
SVHC:
No SVHC (15-Jun-2015)
Digital IC Case Style:
DIP

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Applications

  • Power Management

Legislation and Environmental

Moisture Sensitivity Level:
-
RoHS Compliant:
Yes

Substitutes

PFC PRE-REGULATOR, 35V, 16-DIP

TEXAS INSTRUMENTS

0

Price for: Each

100+ $2.97 250+ $2.82 500+ $2.53 1000+ $1.91

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