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Infineon Technologies ICE5QR0680AG | Demoboard AN_201702_PL83_007
42 W 12 V 5 V SMPS demo board with ICE5QR0680AG
Overview
| Topology | Flyback Converter |
| Input voltage | 85-300 V |
| Output 1 | 12 V / 3.41 A |
| Output 2 | 5 V / 0.2 A |
| IC revision | 1.0 |
Description
This AN is an engineering report for a 42 W 12 V and 5 V demo board designed in a QR flyback converter topology using the 5th generation QR CoolSET™ ICE5QR0680AG. The target applications of ICE5QR0680AG are either auxiliary power supplies for white goods, PCs, servers or TVs, or enclosed adapters for Blu-ray players, set-top boxes, games consoles, etc. With the CoolMOS™ integrated into this IC, it greatly simplifies the design and layout of the PCB. The new improved digital frequency reduction with proprietary QR operation offers lower EMI and higher efficiency for a wide AC range by reducing the switching frequency difference between low- and high-line. The enhanced Active Burst Mode (ABM) power enables flexibility in standby power operation range selection, and QR operation during ABM. As a result, the system efficiency over the entire load range is significantly improved compared to a conventional free-running QR converter implemented with only maximum switching frequency limitation at light loads. In addition, numerous adjustable protection functions have been implemented in ICE5QR0680AG to protect the system and customize the IC for the chosen application. In case of failure modes such as brownout or line over-voltage, V CC over-/under-voltage, open control-loop or over-load, output over-voltage, over-temperature, V CC short-to-ground and Current Sense (CS) short-to-ground, the device enters protection mode. By means of the cycle-by-cycle Peak Current Limitation (PCL), the dimensions of the transformer and the current rating of the secondary diode can both be optimized. Thus, a cost-effective solution can easily be achieved.
Features
- Novel quasi-resonant switching scheme
- Rapid and adjustable start-up with cascode configuration
- 2 level selectable active burst mode level
- Built-in digital soft-start
- Cycle by cycle peak current limitation
- Digital frequency reduction with decreasing load for higher efficiency
- Adjustable line input over-voltage and brown IN/OUT protection
- VCC and CS pin short to ground protection
- OLP, output short, output over-voltage, OTP with hysteresis and VCC over/under voltage protection
- Auto-restart for all protection features
Typical applications
- Offline aux SMPS for server, PC power, aircon, refrigerator and audio / Offline main SMPS for adapter, set-top-box, water purifier, TV, industrial SMPS and POE
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | L(µH) | IR(A) | ISAT,10%(A) | RDC max.(Ω) | fres(MHz) | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-TBL Series 102 - 5.00 mm Horizontal Entry Modular, 2, Wire Protector | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 102 - 5.00 mm Horizontal Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 22 to 14 (AWG) 0.75 to 1.5 (mm²) | – | Rated Current17.5 A | – | – | – | – | |||
 | WR-TBL Series 412B - 3.50 mm Screwless 45° Entry - 2.1 mm² Wires, 2, Screwless | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Pins2 | PCB/Cable/PanelPCB | ModularityNo | Type45° | Wire Section 14 to 20 (AWG) 2.08 to 0.518 (mm²) | – | Rated Current2 A | – | – | – | – | ||||
 | WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | Inductance2.2 µH | Rated Current6.3 A | Saturation Current @ 10%5.7 A | DC Resistance0.02 Ω | Self Resonant Frequency65 MHz | VersionHeat Shrinking Tube | ||||
| WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | – | Inductance4.7 µH | Rated Current4.2 A | Saturation Current @ 10%3.7 A | DC Resistance0.03 Ω | Self Resonant Frequency40 MHz | VersionHeat Shrinking Tube |