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Infineon Technologies ICE2QS03G | Demoboard ANPS0045
Converter design using the quasi-resonant PWM controller ICE2QS03G
Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Output 1 | 265 V / 0.82 A |
| IC revision | 45W Rev1.0 |
Description
ICE2QS03G is a second generation quasi-resonant PWM controller optimized for off-line power supplyapplications such as LCD TV, and notebook adapter. The digital frequency reduction with decreasing loadenables a quasi-resonant operation till very low load. As a result, the system average efficiency issignificantly improved compared to conventional solutions. The active burst mode operation enables ultra-lowpower consumption at standby mode operation and low output voltage ripple. The numerous protectionfunctions give a full protection of the power supply system in failure situation. All of these make theICE2QS03G an outstanding controller for quasi-resonant flyback converter in the market.In addition, numerous protection functions have been implemented in the IC to protect the system andcustomize the IC for the chosen applications. All of these make the ICE2QS03G an outstanding product forreal quasi-resonant flyback converter in the market.
Features
Load dependent digital frequency reduction
- Active burst mode for light load operation
- Built-in high voltage startup cell
- Built-in digital soft-start
- Cycle-by-cycle peak current limitation with built-in leading edge blanking time
- Foldback Point Correction with digitalized sensing and control circuits
- VCC undervoltage and overvoltage protection with Autorestart mode
- Over Load /open loop Protection with Autorestart mode
- Built-in Over temperature protection with Autorestart mode
- Adjustable output overvoltage protection with Latch mode
- Short-winding protection with Latch mode
- Maximum on time limitation
- Maximum switching period limitation
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT,10%(A) | fres(MHz) | Version | IR(A) | L(µH) | RDC max.(Ω) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-TI Radial Leaded Wire Wound Inductor, 8.5 A, 140 MHz | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | Saturation Current @ 10%8.5 A | Self Resonant Frequency140 MHz | VersionHeat Shrinking Tube | Rated Current8.5 A | Inductance1 µH | DC Resistance0.015 Ω | – | – | – | Length6 mm | Width6 mm | Height8.5 mm | MountTHT | ||||
 | WE-CMB Common Mode Power Line Choke, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMB Common Mode Power Line Choke | – | – | VersionTHT | Rated Current0.7 A | Inductance10000 µH | DC Resistance0.35 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (AC) | MaterialMnZn | Length15 mm | Width7.5 mm | Height18 mm | MountTHT |