E1QS01 Datasheet PDF - Infineon Technologies

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E1QS01
Infineon Technologies

Part Number E1QS01
Description ICE1QS01
Page 21 Pages


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Datasheet, V1.4, 27 April 2004
www.datasheet4u.com
ICE 1QS01
Controller for Quasiresonant
Switch Mode Power Supplies
Supporting Low Power Standby
and Power Factor Correction
Power Management & Supply
Never stop thinking.



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ICE1QS01
Revision
History: Current
Version: 2004-
04-27
Previous
Version: 2003-
www.dat1a1s-h2e8et4u.com
Page13 (in
Page 13 (in
Diagram mains undervoltage lockout curent added
previous version) current version)
Page 16-18 (in Page 16-18 (in Min.- max.- values added, typ. values adapted, according to measuring results.
previous version) current version)
Page 20 (in
Page 20 (in
Application circuit changed to new 250 W demo board with PFC current pump.
previous version) current version)
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 char-
acteristics.
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 In-
fineon 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 fail-
ure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life sup-
port devices or systems are intended to be implanted in the human body, or to support and/or maintain and sus-
tain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons



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ICE1QS01
Controller for Switch Mode Power Supplies
Supporting Low Power Standby and
Power Factor Correction (PFC)
www.datasheet4u.com
Features
• 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-DIP-8-4
P-DIP-8-4
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 over-
and undervoltage, mains undervoltage and current limiting. Regulation can be done by using the internal error
amplifier or an opto coupler feedback. The output driver is ideally suited for driving a power MOSFET.
The ICE1QS01 is suited for TV-sets, DVD- sets, SAT- receivers and other consumer applications in the power
range from 0 to app. 300 W.
Type
ICE1QS01
ICE1QS01G
Version 1.4
Ordering Code
Q67040-S4558
Q67040-S4559
3
Package
P-DIP-8
P-DSO-8
27 Apr 2004



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ICE1QS01
Block Diagram
VCC
PCS
Foldback
Point Corr.
20V Overvoltage
- Protection
+
UVLO
+
-
SRC +
-
2V
RZI
50mV
+
-
5.7V
-
1V +
OFC
+
1V -
+
5V -
+
-
1V
-
+ 1.5V
Burst-Mode
Reference
Voltage and
Current
Ringing
Suppression
Time
Start
5V
+
4.8V -
+
4.5V -
+
3.5V -
50µs Timer
Latch
50ms Timer
Primary
Regulation
Digital Processing
5V
20k
ZC-Counter
UP/DO-Counter
S QSET
Power
Driver
RQ
CLR
OUT
D QSET
LQ
CLR
GND
Version 1.4
4
27 Apr 2004



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