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Parameters

Device type Buck PFC Control method CCM Operating supply (Max) (V) 3.6 Operating supply current (mA) 8 UVLO thresholds on/off (V) 2.53/1.85 Features Green Mode, Leading Edge Blanking, Low Power, Soft Start Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other Power factor correction (PFC) controllers

Package | Pins | Size

TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Power factor correction (PFC) controllers

Features

  • Buck Power Factor Correction for High Efficiency Across Line
  • Low Off-Line Startup Current, With SmartStart Algorithm for Fast Startup With Soft-Start
  • Compatible With Resistive or Pass Transistor Fed Startup from the AC Line
  • Low Power SmartBurst Mode for Standby and Light-Load Conditions
  • Current Sense Inputs for PFC control and Overload Protection
  • Line Sense UVLO
  • Sense and Drive Control for External Startup Depletion Mode FET
  • Latching Fault Input Pin
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Description

The UCC29910A Buck Power Factor Correction (PFC) controller provides a relatively flat high-efficiency performance across universal line for designers requiring a high power factor (>0.9) and wishing to meet the requirements of IEC 61000-3-2. Based on a buck topology, inherent inrush current limiting eliminates the need for additional components. With a typical bus voltage of 84 V, the topology is ideally suited for use with low voltage stress downstream regulation/isolation power trains, such as half-bridge stages controlled by the UCC29900, (Texas Instruments Literature Number, SLUS923). This combination offers low common-mode noise generation allowing reduced filtering and exceptionally high conversion efficiency.

The UCC29910A incorporates AC line UVLO and controlled soft start for fast start-up. Enhanced light-load efficiency is achieved through advanced management algorithms for best-in-class no-load and light-load performance.

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Technical documentation

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Type Title Date
* Datasheet Buck PFC Controller - datasheet (Rev. A) Jun. 21, 2011
User guides Using the UCC29910AEVM-730 (Rev. A) Oct. 07, 2011

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