ML4800

Power Factor Correction (PFC) and PWM Controller Combo

The ML4800 is a controller for power factor corrected, switched mode power supplies. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC1000-3-2 specification. Intended as a BiCMOS version of the industry-standard ML4824, the ML4800 includes circuits for the implementation of leading edge, average current, "boost" type power factor correction and a trailing edge, pulse width modulator (PWM). It also includes a TriFault Detec™ function to help ensure that no unsafe conditions will result from single component failure in the PFC. Gate-drivers with 1A capabilities minimize the need for external driver circuits. Low power requirements improve efficiency and reduce component costs.An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and input voltage brownout protection. The PWM section can be operated in current or voltage mode, at up to 250kHz, and includes an accurate 50% duty cycle limit to prevent transformer saturation.

Features

  • Internally synchronized leading-edge PFC and trailing-edgePWM in one IC
  • TriFault Detect™ for UL1950 compliance andenhanced safety
  • Slew rate enhanced transconductance error amplifierfor ultra-fast PFC response
  • Low power: 200µA startup current, 5.5mA operatingcurrent
  • Low total harmonic distortion, high PF
  • Reduced ripple current in storage capacitor betweenPFC and PWM sections
  • Average current, continuous boost leading edge PFC
  • PWM configurable for current-mode or voltage modeoperation
  • Current fed gain modulator for improved noise immunity
  • Overvoltage and brown-out protection, UVLO, and softstart
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Index Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
Convention*
Qualification
Support
Compliance
Certificates
0 ML4800ISX Not Recommended For New Design as of 03-Nov-2010
Green as of Feb 2010
Replacement Part:
$2.06

SO 16L NB -  Details
1.474 x 3.912 x 9.906mm,  TAPE REEL

PDF SO 16L NB  Drawing
Last Update: Feb 2012 PDF M16A SON16, Packing Drawing
Last Update: Jan 2015 PDF M16A SON16, Packing Drawing (MSL 3)
Last Update: Feb 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2ML4800IS

RƟJA 80°C/W

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 ML4800CSX Not Recommended For New Design as of 03-Nov-2010
Green as of Feb 2010
Replacement Part:
$1.68

SO 16L NB -  Details
1.474 x 3.912 x 9.906mm,  TAPE REEL

PDF SO 16L NB  Drawing
Last Update: Feb 2012 PDF M16A SON16, Packing Drawing
Last Update: Jan 2015 PDF M16A SON16, Packing Drawing (MSL 3)
Last Update: Feb 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2ML4800CS

RƟJA 80°C/W

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 ML4800CP Full Production
Green as of Mar 2011
$2.1

MDIP 16L -  Details
3.3 x 6.3 x 19.18mm,  RAIL

PDF MDIP 16L  Drawing
Last Update: Feb 2012 PDF SiTEC DIP16 tube drawing
Last Update: Sep 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&4 (4-Digit Date Code)
&K

Line 2ML4800CP

RƟJA 80°C/W

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
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* Click here for further top mark packaging information for ML4800

  • AC-DC Merchant Power Supply
Application Note Description
AN-8026 PDFFAN9611 / FAN9612 400W 1-Layer Evaluation Board User Guide (FEB301)
Last Update : 28-Jun-2014
AN-8027 PDFFAN480X PFC+PWM Combination Controller Application
Last Update : 28-Jun-2014

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