ICE3DS01L Infineon Technologies, ICE3DS01L Datasheet - Page 15

• Manufacturer Part Number: ICE3DS01L
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3DS01L

• Output Isolation: Isolated
• Frequency Range: 98 ~ 119kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 500V
• Power (watts): 900mW
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• For Use With: EVALSF3-ICE3DS01G-60WIN - BOARD DEMO ICE3DS01G 60W SO-8EVALSF3-ICE3DS01IN - BOARD DEMO ICE3DS01 60W 8-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3DS01LX; ICE3DS01LXK; SP000014265

outside the operating range > 4.8V, e.g. when Open Loop
happens. Therewith small voltage overshoots of V
normal operating can not start the Latched Off Mode.
The internal Voltage Reference is switched off once Latched
Off Mode is entered in order to reduce the current
consumption of the IC as much as possible. Latched Off
Mode can only be reset by decreasing V
stage only the UVLO is working which controls the Startup
Cell by switching on/off at V
average current consumption is only 300µA. As there is no
longer a self supply by the auxiliary winding VCC drops.
The Undervoltage Lockout switches on the integrated
Startup Cell when VCC falls below 8.5V. The Startup Cell is
switched off again when VCC has exceeded 15V. As the
Latched Off Mode was entered there is no Start Up Phase
after VCC has exceeded the switch-on level of the
Undervoltage Lockout. Therefore VCC changes between the
switch-on and switch-off levels of the Undervoltage Lockout
with a saw tooth shape (see Figure 19).
Figure 19
After detecting a junction temperature higher than 140°C
Latched Off Mode is entered.
The signals coming from the temperature detection and VCC
overvoltage detection are fed into a spike blanking with a
time constant of 8.0µs to ensure system reliability.
Furthermore short winding and short diode on the secondary
side can be detected by the comparator C11 which is in
parallel to the propagation delay compensated current limit
comparator C10. In normal operating mode comparator C10
keeps the maximum level of the CS signal at 1V. If there is
a failure such as short winding or short diode C10 is no
longer able to limit the CS signal at 1V. C11 detects then the
over current and enters immediately the Latched Off Mode
to keep the SMPS in a safe stage.
Version 2.1
1.05mA
8.5V
V
V
15V
I
VCCStart
OUT
VCC
Signals in Latched Off Mode
VCCon
/V
VCCoff
VCC
. In this phase the
< 6V. In this
VCC
during
t
t
15
3.6.3.2
Figure 20
In case of Overload or Open Loop FB exceeds 4.8V which
will be observed by C4. At this time S1 is released that V
can increase. If V
Auto Restart Mode is entered as both inputs of the gate G5
are high. In combining the FB and SoftS signals there is a
blanking window generated which prevents the system to
enter Auto Restart Mode due to large load jumps. This time
window is the same as for the Active Burst Mode and can
therefore be adjusted by the external C
In case of VCC undervoltage the UVLO starts a new startup
cycle.
Short Optocoupler leads to VCC undervoltage as there is
now self supply after activating the internal reference and
bias.
In contrast to the Latched Off Mode there is always a Startup
Phase with switching cycles in Auto Restart Mode. After this
Start Up Phase the conditions are again checked whether the
failure is still present. Normal operation is proceeded once
the failure mode is removed that leads to Auto Restart Mode.
SoftS
FB
5.4V
4.8V
S1
Auto Restart Mode
4.4V
5kΩ
C3
C4
Auto Restart Mode
SoftS
R
G2
SoftS
exceeds 5.4V which is observed by C3
1
Functional Description
6.5V
G5
&
ICE3DS01L/LG
SoftS
.
Control Unit
15 Nov 2005
Reference
Voltage
Restart
Mode
Auto
F3
SoftS