Maker : Infineon Technologies
Part No. : E1QS01

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D a t a s he et , V 1 . 4 , 2 7 A p ri l 2 00 4 www.datasheet4u.com ICE 1QS01 Controller for Quasiresonant Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction Pow er Mana geme nt & Sup ply N e v e r s t o p t h i n k i n g . ICE1QS01 Revision History: Current Version: 200404-27 Previous Version: 200311-28 www.datasheet4u.com Page13 (in Page 13 (in previous version) current version) Page 16-18 (in Page 16-18 (in previous version) current version) Page 20 (in Page 20 (in previous version) current version) Diagram mains undervoltage lockout curent added Min.- max.- values added, typ. values adapted, according to measuring results. Application circuit changed to new 250 W demo board with PFC current pump. Edition 2004-04-27 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 München © Infineon Technologies AG 2004. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as warranted characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide (see address list). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons ICE1QS01 Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction (PFC) www.datasheet4u.com P-DIP-8-4 Features P-DIP-8-4 • • • • • • • • • • • • • • Quasiresonant Operation Primary and Secondary Regulation Primary Current Simulation Standby Input Power < 1 W Low Power Consumption Very Low Start-up Current Soft-Start for noiseless Start-up Standby Burst Mode with and without Control Signal for lowered Output Voltages Digital Frequency Reduction in small Steps at Decreasing Load Over- and Undervoltage Lockout Switch Off at Mains Undervoltage Mains Voltage Dependent Fold Back Point Correction Ringing Suppression Time Controlled from Output Voltage Free usable Fault Comparator P-DSO-8-3 P-DSO-8-3 Functional Description The ICE1QS01 is optimized to control free running flyback converters with and without Power Factor Correction (with PFC Charge Pump). The switching frequency is reduced in small steps with decreasing load towards a minimum of 20 kHz in standby mode. This function is performed by a digital circuit to avoid any jitter also with periodically pulsed loads. To provide extremely low power consumption at light loads, this device can be switched into Standby Burst Mode. This is also possible without standby control signal (for adapter application). Additionally, the start up current is very low. To avoid switching stresses of the power devices, the power transistor is always switched on at minimum voltage. The device has several protection functions: VCC overand undervoltage, mains undervoltage and current limiting. Regulation can be done by using the internal error amplifier or an opto ...

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