ICE3A1065 Infineon Technologies, ICE3A1065 Datasheet - Page 15

• Manufacturer Part Number: ICE3A1065
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3A1065

• 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: ICE3A1065X; ICE3A1065XK; SP000015074

Current Limiting is now possible in a very accurate way. E.g.
I
Compensation the current sense threshold is set to a static
voltage level V
dI/dt = 0.4A/µs, that means dV
propagation delay time of i.e. t
then to an I
delay compensation the overshoot is only about 2% (see
Figure 15).
Figure 15
The Propagation Delay Compensation is realized by means
of a dynamic threshold voltage V
of a steeper slope the switch off of the driver is earlier to
compensate the delay.
Figure 16
Version 2.0
peak
V
V
OSC
csth
= 0.5A with R
1,25
1,15
1,05
0,95
1,3
1,2
1,1
0,9
V
V
1
Sense
0
peak
0,2
max. Duty Cycle
overshoot of 14.4%. By means of propagation
Overcurrent Shutdown
Dynamic Voltage Threshold V
csth
Signal1
0,4
=1V. A current ramp of
Sense
with compensation
0,6
0,8
= 2. Without Propagation Delay
1
dV
off time
dt
Propagation Delay
Sense
Propagation Delay
csth
1,2
Sense
without compensation
(see Figure 16). In case
/dt = 0.8V/µs, and a
1,4
Signal2
1,6
csth
=180ns leads
1,8
2
t
t
µ
V
s
15
3.6
The Control Unit contains the functions for Active Burst
Mode and Auto Restart Mode. The Active Burst Mode and
the Auto Restart Mode are combined with an Adjustable
Blanking Window which is depending on the external Soft
Start capacitor. By means of this Adjustable Blanking
Window, the IC avoids entering into these two modes
accidentally. Furthermore it also provides a certain time
whereby the overload detection is delayed. This delay is
useful for applications which normally works with a low
current and occasionally require a short duration of high
current.
3.6.1
Figure 17
V
SMPS is settled. If overload occurs V
Auto Restart Mode can’t be entered as the gate G5 is still
blocked by the comparator C3. But after V
4.8V the switch S1 is opened via the gate G2. The external
SoftS
SoftS
FB
5.4V
4.8V
1.32V
is clamped at 4.4V by the closed switch S1 after the
S1
Control Unit
Adjustable Blanking Window
4.4V
5kΩ
C3
C4
Adjustable Blanking Window
C5
R
G2
SoftS
1
Functional Description
6.5V
G5
&
CoolSET™-F3
FB
is exceeding 4.8V.
FB
G6
&
24 Aug 2005
Control Unit
Restart
has exceeded
Active
Mode
Mode
Burst
Auto