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IC manufacturers ON Semiconductor

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ON Semiconductor FAN7631

Advanced PFM Controller for Half-Bridge Resonant Converter

Overview

Topology Power Factor Correction
Input voltage 90-265 V
Switching frequency 10-600 kHz
Output 1 400 V / 1 A
IC revision 1.0.2

Description

The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions. The FAN7631 features include variable dead time, high operating frequency up to 600kHz, protections such as LUVLO, and a selectable latch or A/R protection using the LS pin for user convenience.

The Zero-Voltage-Switching (ZVS) technique reduces the switching losses and improves the efficiency significantly. ZVS also reduces the switching noise noticeably, which allows a small Electromagnetic Interference (EMI) filter.

Offering everything necessary to build a reliable and robust resonant converter, the FAN7631 simplifies designs and improves productivity and performance. The FAN7631 can be applied to resonant converter topologies such as series resonant, parallel resonant, and LLC resonant converters.

Features

  • Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topologies
  • High Efficiency with Zero-Voltage-Switching (ZVS)
  • Up to 600kHz Operating Frequency
  • Built-in High-Side Gate Driver
  • High Gate-Driving Current: +500mA/-1000mA
  • Programmable Dead Time with a Resistor
  • Pulse Skipping and Burst Operation for Frequency Limit (Programmable) at Light-Load Condition
  • Simple Remote On/Off Control with Latch or Auto-Restart (A/R) Using FI or LS Pin
  • Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD), and High Precise Line Under Voltage Lockout (LUVLO)
  • Level-Change OCP Function During Startup

Typical applications

  • PDP and LCD TVs
  • Adapters
  • Desktop PCs and Servers
  • Video Game Consoles
  • Teelecom Power Supplies

Products

Order Code Data­sheet Downloads Product series IR 1
(A)
IR
(A)
L1
(mH)
L
(mH)
RDC1 max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
Q IR 1
(mA)
RDC typ.
(Ω)
RDC max.
(mΩ)
Samples
744825510
STE ALT EAG CAD LTS PSP IGS CAD SPA WE-CMB Common Mode Power Line Choke 5 5 10 10 55 250 1500 55
7447076
STE ALT EAG CAD LTS PSP IGS WE-FI Leaded Toroidal Line Choke 6.1 6.1 0.15 0.15 45 45
7447905
STE ALT EAG CAD IGS CAD WE-MI SMT Multilayer Inductor 0.05 0.001 45 50 0.32 400
750341924
Power Transformer
750341925
Power Transforme
750341926
Power Inductor
750341927
Power Transformer
Order Code Data­sheet
744825510
7447076
7447905
750341924
750341925
750341926
750341927
Samples
Order Code Data­sheet Downloads Product series IR 1
(A)
IR
(A)
L1
(mH)
L
(mH)
RDC1 max.
(mΩ)
VR
(V (AC))
VT
(V (AC))
Q IR 1
(mA)
RDC typ.
(Ω)
RDC max.
(mΩ)
Samples