ICE3A1065L Infineon Technologies, ICE3A1065L Datasheet - Page 8

• Manufacturer Part Number: ICE3A1065L
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3A1065L

• Output Isolation: Isolated
• Frequency Range: 92 ~ 108kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 650V
• Power (watts): 32W
• Operating Temperature: -25°C ~ 130°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3A1065LX; ICE3A1065LXK; SP000098668

The maximum current consumption before the
controller is activated is about 160µA.
When V
internal reference is switched off and the Power Down
reset let T1 discharging the soft-start capacitor C
pin SoftS. Thus it is ensured that at every startup cycle
the voltage ramp at pin SoftS starts at zero.
The internal Voltage Reference is switched off if
Latched Off Mode or Auto Restart Mode is entered.
The current consumption is then reduced to 300µA.
Once the malfunction condition is removed, this block
will then turn back on. The recovery from Auto Restart
Mode does not require disconnecting the SMPS from
the AC line. In case Latched Off Mode is entered, VCC
needs to be lowered below 6V to reset the Latched Off
Mode. This is done usually by disconnecting the SMPS
from the AC line.
When Active Burst Mode is entered the internal Bias is
switched off in order to reduce the current consumption
below 1.05mA while keeping the Voltage Reference
still active as this is necessary in this mode.
3.3
Figure 4
At the beginning of the Startup Phase, the IC provides
a Soft Start duration whereby it controls the maximum
primary current by means of a duty cycle limitation. A
Version 2.0
SoftS
C
SoftS
VCC
falls below the off-threshold V
Startup Phase
4V
0.85V
Soft Start
Soft Start
R
SoftS
C7
3.25k
C2
PWM OP
T2
Comparator
Soft-Start
x3.7
G7
&
T3
CCoff
Gate Driver
=8.5V the
1V
6.5V
SoftS
CS
at
8
signal V
capacitor C
resistor R
exceeds 4V.
When the Soft Start begins, C
charged up to approx. 1V by T2. Therefore the Soft
Start Phase takes place between 1V and 4V. Above
V
DC
comparator C2 blocks the gate G7 (see Figure 4). This
maximum charge current in the very first stage when
V
Figure 5
By means of this extra charge stage, there is no delay
in the beginning of the Startup Phase when there is still
no switching. Furthermore Soft Start is finished at 4V to
have faster the maximum power capability. The duty
cycles DC
the primary inductance of the transformer. The
limitation of the primary current by DC
V
current which is limited by the internal Current Limiting
with CS = 1V. Therefore the maximum Startup Phase
is divided into a Soft Start Phase until t1 and a phase
from t1 until t2 where maximum power is provided if
demanded by the FB signal.
SoftsS
SoftS
SoftS
DC
5.4V
4V
1V
V
DC
DC
max
SoftS
max
1
2
is below 1V, is limited to 1.30mA.
= 4V. But DC
= 4V there is no longer duty cycle limitation
which is controlled by comparator C7 since
SoftS
max. Soft Start Phase
SoftS
1
Softs
and DC
Startup Phase
, determines the duty cycle until V
which is generated by the external
in combination with the internal pull up
2
1
are depending on the mains and
is related to a maximum primary
max. Startup Phase
Functional Description
t1
CoolSET™-F3
SoftS
ICE3xxx65L
is immediately
2
8 May 2006
is related to
t2
SoftS
t
t