DEMO5QSAG60W1TOBO1 Infineon

ICE5QSAG Quasi-Resonant Controller Product Highlights 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 PG-DSO-8 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 Features Applications Minimum switching frequency difference between low & high Auxiliary power supply for Home Appliances/white Goods, TV, line for higher efficiency & better EMI PC & Server Enhanced Active Burst Mode with selectable entry and exit Blu-ray player, Set-top box & LCD/LED Monitor standby power Description Active Burst Mode to reach the lowest standby power <100 mW th Fast startup achieved with cascode configuration The Quasi-Resonant, ICE5QSAG is the 5 generation of quasi- resonant controller optimized for off-line switch power supply in Digital frequency reduction up to 10 zero crossings cascode configuration. The improved digital frequency reduction Built-in digital soft start with proprietary novel Quasi-Resonant operation offers lower EMI Cycle-by-cycle peak current limitation and higher efficiency for wide AC range by reducing the switching frequency difference between low and high line. The enhanced Maximum on/off time limitation to avoid audible noise during active burst mode enables flexibility in standby power range start up and power down selection. The product has a wide operating range (10~25.5 V) of Robust line protection with input OVP and brownout IC power supply and lower power consumption. The numerous Auto restart mode protection for VCC Over Voltage, VCC Under protection functions including the robust line protection (both Voltage, Over load/Open Loop, Output Over Voltage, Over input OVP and brownout) to support the protections of the power Temperature supply system in failure situations. All of these make the Limited charging current for VCC short to GND ICE5QSAG an outstanding controller for Quasi-Resonant flyback converter in the market. Pb-free lead plating, halogen free mold compound, RoHS compliant Wp Lf1 D R O1 C STARTUP Snubber V bus C O1 C f1 O1 Ws1 R D 85 ~ 300 VAC VCC VCC C VCC Lf2 DO2 C VO2 CO2 f2 D W ZC RZC a Ws2 D ~D r1 r4 CZC VCC ZCD R I1 D Power CPS Power Management VIN MOSFET R GATE ZCD PWM controller R I2 Current Mode Control R R R R b1 b2 ovs1 ovs3 Cycle-by-Cycle SOURCE Gate GND current limitation Driver Digital Control CS R c1 Active Burst Mode FB Zero Crossing ICE5QSAG Optional C C R c1 c2 Detection CS Optocoupler R (Burst mode level 2) Sel Controller TL431 Protections R (V feedback) ovs3 02 Rovs2 Figure 1 Typical application th Table 1 Output Power of 5 generation Quasi-Resonant Controller 1 1 Type Package Marking 220VAC 20% 85-300 VAC ICE5QSAG PG-DSO-8 5QSAG 109 W 60 W 1 Calculated maximum output power rating in an open frame design at Ta=50C, TJ=125C. The output power figure is for reference purpose only. The actual power can vary depending on particular designs. Please contact to a technical expert from Infineon for more information. Datasheet Please read the Important Notice and Warnings at the end of this document V 2.1 www.infineon.com page 1 of 27 2020-02-03 R Sel Quasi-Resonant Controller Table of Contents Table of Contents Product Highlights .......................................................................................................................... 1 Features ........................................................................................................................................ 1 Applications ................................................................................................................................... 1 Description .................................................................................................................................... 1 Table of Contents ........................................................................................................................... 2 1 Pin Configuration and Functionality ......................................................................................... 4 2 Representative Block Diagram ................................................................................................. 5 3 Functional Description ............................................................................................................ 6 3.1 V Pre-Charging and Typical V Voltage during Start-up ..................................................................... 6 CC CC 3.2 Soft-start .................................................................................................................................................. 6 3.3 Normal Operation ................................................................................................................................... 7 3.3.1 Digital Frequency Reduction ............................................................................................................. 7 3.3.1.1 Minimum ZC Count Determination .............................................................................................. 7 3.3.1.2 Up/down counter .......................................................................................................................... 7 3.3.1.3 Zero crossing (ZC counter) ........................................................................................................... 8 3.3.2 Ringing suppression time .................................................................................................................. 9 3.3.2.1 Switch on determination .............................................................................................................. 9 3.3.3 Switch off determination ................................................................................................................... 9 3.3.4 Modulated gate drive ....................................................................................................................... 10 3.4 Current limitation .................................................................................................................................. 10 3.5 Active Burst Mode with selectable power level .................................................................................... 11 3.5.1 Entering Active Burst Mode Operation ............................................................................................ 12 3.5.2 During Active Burst Mode Operation ............................................................................................... 12 3.5.3 Leaving Active Burst Mode Operation ............................................................................................. 12 3.6 Protection Functions ............................................................................................................................. 13 3.6.1 Line Over Voltage ............................................................................................................................. 14 3.6.2 Brownout .......................................................................................................................................... 14 3.6.3 V Ovder Voltage or Under Voltage ................................................................................................. 14 CC 3.6.4 Over Load ......................................................................................................................................... 14 3.6.5 Output Over Voltage ........................................................................................................................ 14 3.6.6 Over Temperature ............................................................................................................................ 14 4 Electrical Characteristics ....................................................................................................... 17 4.1 Absolute Maximum Ratings .................................................................................................................. 17 4.2 Operating Range .................................................................................................................................... 17 4.3 Operating Conditions ............................................................................................................................ 18 4.4 Internal Voltage Reference.................................................................................................................... 18 4.5 Gate Driver ............................................................................................................................................. 18 4.6 PWM Section .......................................................................................................................................... 19 4.7 Current Sense ........................................................................................................................................ 19 4.8 Soft Start ................................................................................................................................................ 19 4.9 Digital Zero Crossing ............................................................................................................................. 20 4.10 Active Burst Mode .................................................................................................................................. 20 4.11 Line Over Voltage Protection ................................................................................................................ 21 4.12 Brownout Protection ............................................................................................................................. 21 4.13 V Over Voltage Protection .................................................................................................................. 21 CC 4.14 Over Load Protection ............................................................................................................................ 21 Datasheet 2 of 27 V 2.1 2020-02-03