ICE3BR1065JF Infineon Technologies, ICE3BR1065JF Datasheet - Page 14

• Manufacturer Part Number: ICE3BR1065JF
• Description: IC OFFLINE CTRLR SMPS OTP TO220
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3Rr

Specifications of ICE3BR1065JF

• Output Isolation: Isolated
• Frequency Range: 58 ~ 75kHz
• Voltage - Input: 10.5 ~ 27 V
• Voltage - Output: 650V
• Power (watts): 28W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: TO-220-6 Full Pack Formed Leads
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000366369

3.6.1
Figure 18
Whenever the internal CoolMOS
leading edge spike is generated due to the primary-
side capacitances and reverse recovery time of the
secondary-side rectifier. This spike can cause the gate
drive to switch off unintentionally. In order to avoid a
premature termination of the switching pulse, this spike
is blanked out with a time constant of t
3.6.2
In case of overcurrent detection, there is always
propagation delay to switch off the internal CoolMOS
An overshoot of the peak current I
delay, which depends on the ratio of dI/dt of the peak
current (see Figure 19).
Figure 19
The overshoot of Signal2 is larger than of Signal1 due
to the steeper rising waveform. This change in the
slope is depending on the AC input voltage.
Propagation Delay Compensation is integrated to
reduce the overshoot due to dI/dt of the rising primary
current. Thus the propagation delay time between
exceeding the current sense threshold V
switching
compensated over temperature within a wide range.
Current Limiting is then very accurate.
Version 2.0
I
I
I
peak2
peak1
Limit
V
csth
I
V
Sense
Sense
Propagation Delay Compensation
off
Leading Edge Blanking
Leading Edge Blanking
Current Limiting
I
Overshoot2
of
Signal2
the
t
LEB
integrated
= 220ns
®
peak
Signal1
is switched on, a
t
Propagation Delay
is induced to the
LEB
CoolMOS
= 220ns.
I
csth
Overshoot1
and the
t
®
t
®
is
.
14
For example, I
sense threshold is set to a static voltage level V
without Propagation Delay Compensation. A current
ramp of dI/dt = 0.4A/µs, or dV
propagation delay time of t
to an I
delay compensation, the overshoot is only around 2%
(see Figure 20).
Figure 20
The Propagation Delay Compensation is realized by
means of a dynamic threshold voltage V
21). In case of a steeper slope the switch off of the
driver is earlier to compensate the delay.
Figure 21
3.7
The Control Unit contains the functions for Active Burst
Mode and Auto Restart Mode. The Active Burst Mode
and the Auto Restart Mode both have 20ms internal
Blanking Time. For the Auto Restart Mode, a further
extendable Blanking Time is achieved by adding
V
V
OSC
csth
1,25
1,15
1,05
0,95
1,3
1,2
1,1
0,9
V
V
1
peak
Sense
0
0,2
max. Duty Cycle
overshoot of 14.4%. With the propagation
Control Unit
Overcurrent Shutdown
Dynamic Voltage Threshold V
Signal1
peak
0,4
= 0.5A with R
with compensation
0,6
0,8
Functional Description
1
dV
off time
Propagation Delay
dt
Propagation Delay
Sense
Sense
1,2
ICE3BR1065JF
CoolSET
without compensation
Sense
1,4
/dt = 0.8V/µs, and a
Signal2
= 2. The current
1,6
csth
11 Sep 2008
=180ns leads
1,8
(see Figure
csth
®
2
-F3R
csth
t
t
V
µ
=1V
s