ICE3BR0665JF Infineon Technologies, ICE3BR0665JF Datasheet - Page 15

• Manufacturer Part Number: ICE3BR0665JF
• Description: IC OFFLINE CTLR SMPS OTP TO220-6
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3Rr
• Type: Off Line Switcherr

Specifications of ICE3BR0665JF

• Output Isolation: Isolated
• Frequency Range: 58 ~ 75kHz
• Voltage - Input: 10.5 ~ 27 V
• Voltage - Output: 650V
• Power (watts): 42W
• Operating Temperature: -25°C ~ 130°C
• Package / Case: TO-220-6 Formed Leads
• Output Voltage: 650 V
• Input / Supply Voltage (max): 27 V
• Input / Supply Voltage (min): - 0.3 V
• Duty Cycle (max): 75 %
• Switching Frequency: 67 KHz
• Operating Temperature Range: - 25 C to + 130 C
• Mounting Style: Through Hole
• Maximum Operating Temperature: + 130 C
• Minimum Operating Temperature: - 25 C
• Output Power: 259 W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000366360

external capacitor at BA pin. By means of this Blanking
Time, the IC avoids entering into these two modes
accidentally. Furthermore those buffer time for the
overload detection is very useful for the application that
works in low current but requires a short duration of
high current occasionally.
3.7.1
Figure 22
There are 2 kinds of Blanking mode; basic mode and
the extendable mode. The basic mode is just an
internal pre-set 20ms blanking time while the
extendable mode has extra blanking time by
connecting an external capacitor to the BA pin in
addition to the pre-set 20ms blanking time. For the
extendable mode, the gate G5 is blocked even though
the 20ms blanking time is reached if an external
capacitor C
blanking time is passed, the switch S1 is opened by
G2. Then the 0.9V clamped voltage at BA pin is
charged to 4.0V through the internal I
current. Then G5 is enabled by comparator C3. After
the 30us spike blanking time, the Auto Restart Mode is
activated.
For example, if C
Blanking time = 20ms + C
Version 2.0
#
C
BK
BA
FB
4.0V
4.5V
1.22V
S1
Basic and Extendable Blanking Mode
BK
Basic and Extendable Blanking Mode
0.9V
is added to BA pin. While the 20ms
C3
C4
C5
I
BK
BK
G2
= 0.22uF, I
1
Blanking
Blanking
20ms
Time
BK
20ms
Time
5.0V
x (4.0 - 0.9) / I
BK
= 13.5uA
G5
&
G6
&
Blanking
Spike
30us
Control Unit
BK
BK
Restart
= 70ms
Mode
Auto
constant
Active
Mode
Burst
15
In order to make the startup properly, the maximum C
capacitor is restricted to less than 0.65uF.
The Active Burst Mode has basic blanking mode only
while the Auto Restart Mode has both the basic and the
extendable blanking mode.
3.7.2
The IC enters Active Burst Mode under low load
conditions. With the Active Burst Mode, the efficiency
increases significantly at light load conditions while still
maintaining a low ripple on V
load jumps. During Active Burst Mode, the IC is
controlled by the FB signal. Since the IC is always
active, it can be a very fast response to the quick
change at the FB signal. The Start up Cell is kept OFF
in order to minimize the power loss.
Figure 23
The Active Burst Mode is located in the Control Unit.
Figure 23 shows the related components.
3.7.2.1
The FB signal is kept monitoring by the comparator C5.
During normal operation, the internal blanking time
counter is reset to 0. When FB signal falls below 1.22V,
it starts to count. When the counter reach 20ms and FB
signal is still below 1.22V, the system enters the Active
Burst Mode. This time window prevents a sudden
entering into the Active Burst Mode due to large load
jumps.
FB
1.22V
4.5V
3.6V
3.1V
Active Burst Mode
Entering Active Burst Mode
Active Burst Mode
C6a
C6b
C4
C5
20 ms Blanking
Functional Description
Time
Control Unit
OUT
ICE3BR0665JF
and a fast response on
CoolSET
G6
&
11 Sep 2008
Internal Bias
G11
&
Active
Mode
Burst
®
Current
Limiting
G10
-F3R
&
BK