infineon公司的ICE5QR4770AG是准谐振700 V/800 V CoolSET™第五代电源器件,采用DIP-7和DSO-12封装,单封装内有两个单独芯片:一片是控制器,一片是HV MOSFET;有源突发模式使得最低待机功率小于100mW,数字频率以达到较好的系统效率,主要用在家用电器/白色家电,TV,PC和服务器的辅助电源,蓝光播放器,机顶盒和LCD/LED监视器.本文介绍了ICE5QR4770AG产品亮点和主要特性,框图,应用电路图以及采用ICE5QR4770AG的15 W 12 V 5 V SMPS演示板主要指标,电路图,材料清单,变压器结构图和PCB设计图.

 The Quasi-Resonant CoolSET™- (ICE5QRxxxxAx) is the 5th generation of Quasi-Resonant integrated power IC optimized for off-line switch power supply in cascode configuration. It is housed in single package with 2 separate chips; one is controller chip and other is HV MOSFET chips. The IC can achieve lower EMI and higher efficiency with improved digital frequency reduction through the proprietary novel Quasi- Resonant operation. The enhanced Active Burst Mode enables flexibility in standby power range selection. The product has a wide operation range (10 ~ 25.5 V) of IC power supply and lower power consumption. The numerous protection functions including the robust line protection (both input OVP and brownout) to support the protections of the power supply system in failure situations. All of these make the CoolSET™ (ICE5QRxxxxAx) series an outstanding integrated power device in Quasi-Resonant flyback converter in the market.

ICE5QR4770AG产品亮点:

Integrated 700 V/800 V avalanche rugged CoolMOS™
Novel Quasi-Resonant operation and proprietary implementation for low EMI
Enhanced Active Burst Mode with selectable entry and exit standby power
Active Burst Mode to reach the lowest standby power <100 mW
Fast startup achieved with cascode configuration
Digital frequency reduction for better overall system efficiency
Robust line protection with input OVP and brownout
Comprehensive protection
Pb-free lead plating, halogen free mold compound, RoHS compliant

ICE5QR4770AG主要特性:

Integrated 700 V/800 V avalanche rugged CoolMOS™
Minimum switching frequency difference between low & high line for higher efficiency & better EMI
Enhanced Active Burst Mode with selectable entry and exit standby power
Active Burst Mode to reach the lowest standby power <100 mW
Fast startup achieved with cascode configuration
Digital frequency reduction up to 10 zero crossings
Built-in digital soft start
Cycle-by-cycle peak current limitation
Maximum on/off time limitation to avoid audible noise during start up and power down
Robust line protection with input OVP and brownout
Auto restart mode protection for VCC Over Voltage, VCC Under Voltage, Over load/Open Loop, Output Over Voltage, Over Temperature and CS (Current Sense) short to GND
Limited charging current for VCC short to GND
Pb-free lead plating, halogen free mold compound, RoHS compliant

ICE5QR4770AG应用:

Auxiliary power supply for Home Appliances/white Goods, TV, PC & Server
Blu-ray player, Set-top box & LCD/LED Monitor

图1.ICE5QR4770AG功能框图

图2. ICE5QR4770AG应用电路图

采用ICE5QR4770AG的15 W 12 V 5 V SMPS演示板

This application note is an engineering report of 15 W 12 V and 5 V demo board designed in a quasi-resonant flyback converter topology using the 5th generation quasi-resonant CoolSET™, ICE5QR4770AG. The target applications of ICE5QR4770AG are either auxiliary power supply of white goods, PC, server and TV or enclosed adapter, Blu-ray player, set-top box, game console, etc. With the CoolMOS™ integrated in this IC, it greatly simplifies the design and layout of the PCB. The improved novel digital frequency reduction with proprietary quasi-resonant operation offers lower EMI and higher efficiency for wide AC range by reducing the switching frequency difference between low and high line. The enhanced active burst mode power enables flexibility in standby power operation range selection and quasi-resonant operation during active burst mode. As a result, the system efficiency, over the entire load range, is significantly improved compared to conventional free running quasi-resonant converter implemented with only maximum switching frequency limitation at light load. In addition, numerous adjustable protection functions have been implemented in ICE5QR4770AG to protect the system and customize the IC for the chosen application. In case of failure modes, like brownout or line over voltage, VCC over/under voltage, open control-loop or over load, output overvoltage, over temperature, VCC short to ground and CS short to ground, the device enters to protection mode. By means of the cycle-by-cycle peak current limitation, the dimension of the transformer and current rating of the secondary diode can both be optimized. Thus, a cost effective solution can be easily achieved.

图3.15 W 12 V 5 V SMPS演示板外形图
15 W 12 V 5 V SMPS演示板指标:


图4.15 W 12 V 5 V SMPS演示板电路图
15 W 12 V 5 V SMPS演示板材料清单:



图5.15 W 12 V 5 V SMPS演示板变压器架构图

图6.15 W 12 V 5 V SMPS演示板PCB设计图(顶层)

图7.15 W 12 V 5 V SMPS演示板PCB设计图(底层)
资料详情请见:
http://www.infineon.com/dgdl/Infineon-ICE5QRxxxxAx-DS-v01_20-EN.pdf?fileId=5546d46259d9a4bf015a4af1eaab111c
和http://www.infineon.com/dgdl/Infineon-ApplicationNote_Demoboard_15W_12V_5V_SMPS_ICE5QR4770AG-AN-v01_00-EN.pdf?fileId=5546d4625a888733015ab72482bd62a9

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