Da ta sheet, V2.0, 1 F eb 2002
PWM-FF IC
ICE2AS01/S01G
ICE2BS01/S01G
Off-Line SMPS Current Mode
Controller
P o w e r M a n a g em e n t & S u p p l y
N e v e r
s t o p
t h i n k i n g .
ICE2AS01/G
ICE2BS01/G
Revision History:
Previous Version:
Page
Subjects (major changes since last revision)
2002-02-01
Datasheet
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Edition 2002-02-01
Published by Infineon Technologies AG,
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©
Infineon Technologies AG 1999.
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circuits, descriptions and charts stated herein.
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Information
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approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure
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and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.
ICE2AS01/G
ICE2BS01/G
Off-Line SMPS Current Mode Controller
Product Highlights
P-DIP-8-4
• Enhanced Protection Functions all
with Auto Restart
• Lowest Standby Power Dissipation
• Very Accurate Current Limiting
P-DSO-8-3
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Only few external Components required
Input Undervoltage Lockout
67kHz/100kHz fixed Switching Frequency
Max Duty Cycle 72%
Low Power Standby Mode to support
“Blue Angle” Norm
Latched Thermal Shut Down
Overload and Open Loop Protection
Overvoltage Protection during Auto Restart
Adjustable Peak Current Limitation via
External Resistor
Overall Tolerance of Current Limiting
<
±5%
Internal Leading Edge Blanking
Soft Start
Soft Switching for Low EMI
Description
This stand alone controller provides several special
enhancements to satisfy the needs for low power standby
and protection features. In standby mode frequency
reduction is used to lower the power consumption and
provide a stable output voltage in this mode. The frequency
reduction is limited to 20kHz / 21.5 kHz (typ.) to avoid
audible noise. In case of failure modes like open loop,
overvoltage or overload due to short circuit the device
switches in Auto Restart Mode which is controlled by the
internal protection unit. By means of the internal precise
peak current limitation the dimension of the transformer and
the secondary diode can be lower which leads to more cost
efficiency.
Typical Application
+
85 ... 270 VAC
R
Start-up
Snubber
Converter
DC Output
-
C
VCC
VCC
Feedback
Low Power
StandBy
Power
Management
SoftS
Soft-Start Control
Gate
PWM Controller
Current Mode
Precise Low Tolerance
Peak Current Limitation
C
Soft Start
Isense
FB
Protection Unit
R
Sense
GND
Feedback
ICE2AS01 / ICE2BS01
Type
ICE2AS01
ICE2AS01G
ICE2BS01
ICE2BS01G
Ordering Code
Q67040-S4472
Q67040-S4473
Q67040-S4475
Q67040-S4476
Frequency
100kHz
100kHz
67kHz
67kHz
Package
P-DIP-8-4
P-DSO-8-3
P-DIP-8-4
P-DSO-8-3
Version 2.0
3
1 Feb 2002
ICE2AS01/G
ICE2BS01/G
Table of Contents
1
1.1
1.2
2
3
4
4.1
4.2
4.2.1
4.2.2
4.3
4.4
4.4.1
4.4.2
4.5
4.5.1
4.5.2
4.6
4.7
4.8
4.8.1
4.8.2
4.8.3
5
5.1
5.2
5.3
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
6
7
Page
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pin Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pin Configuration and Functionality
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Representative Blockdiagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Functional Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Improved Current Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
PWM-OP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
PWM-Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Soft-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Oscillator and Frequency Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Frequency Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Leading Edge Blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Propagation Delay Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
PWM-Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Protection Unit (Auto Restart Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Overload & Open loop with normal load . . . . . . . . . . . . . . . . . . . . . . . . .12
Overvoltage due to open loop with no load . . . . . . . . . . . . . . . . . . . . . . .13
Thermal Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Electrical Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Supply Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Internal Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Control Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Protection Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Driver Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Typical Performance Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . .19
Outline Dimension
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Version 2.0
4
1 Feb 2002
ICE2AS01/G
ICE2BS01/G
1
1.1
Pin Configuration and Functionality
Pin Configuration
1.2
Pin Functionality
Pin
1
2
3
4
5
6
7
8
Symbol
N.C.
SoftS
FB
Isense
Gate
VCC
GND
N.C.
Function
Not connected
Soft Start & Auto Restart Control
Regulation Fedback
Controller Current Sense Input
Driver Output
Controller Supply Voltage
Controller Ground
Not connected
SoftS (Soft Start & Auto Restart Control)
This pin combines the function of Soft Start in case of
Start Up and Auto Restart Mode and the controlling of
the Auto Restart Mode in case of an error detection.
FB (Feedback)
The information about the regulation is provided by the
FB Pin to the internal Protection Unit and to the internal
PWM-Comparator to control the duty cycle.
Isense (Current Sense)
The Current Sense pin senses the voltage developed
on the series resistor inserted in the source of the
external Power Switch. When Isense reaches the
internal threshold of the Current Limit Comparator, the
Driver output is disabled. By this mean the Over
Current Detection is realized.
Furthermore the current information is provided for the
PWM-Comparator to realize the Current Mode.
Gate (Driver Output)
The current and slew rate capability of this pin are
suited to drive Power MOSFETs.
VCC (Power supply)
This pin is the positiv supply of the IC. The operating
range is between 8.5V and 21V.
To provide overvoltage protection the driver gets
disabled when the voltage becomes higher than 16.5V
during Start up Phase.
GND (Ground)
This pin is the ground of the primary side of the SMPS.
Package P-DIP-8-4
G-Package P-DSO-8-3
N.C.
1
8
N.C.
SoftS
2
7
GND
FB
3
6
VCC
Isense
4
5
Gate
Figure 1
Pin Configuration (top view)
Version 2.0
5
1 Feb 2002
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