ICE3B1065 Infineon Technologies, ICE3B1065 Datasheet - Page 11

• Manufacturer Part Number: ICE3B1065
• Description: IC OFFLINE CTRLR SMPS OTP 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r

Specifications of ICE3B1065

• Output Isolation: Isolated
• Frequency Range: 61 ~ 73kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 650V
• Power (watts): 32W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Number Of Outputs: 1
• Duty Cycle (max): 77 %
• Output Voltage: 650 V
• Output Current: 1000 mA
• Mounting Style: Through Hole
• Switching Frequency: 71 KHz
• Maximum Operating Temperature: + 150 C
• Fall Time: 30 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 30 ns
• Synchronous Pin: No
• Topology: Flyback
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3B1065X; ICE3B1065XK; SP000015076

3
All values which are used in the functional description are
typical values. For calculating the worst cases the min/max
values which can be found in section 4 Electrical
Characteristics have to be considered.
3.1
CoolSET™-F3 is the further development of the
CoolSET™-F2 to meet the requirements for the lowest
Standby Power at minimum load and no load conditions. A
new fully integrated Standby Power concept is implemented
into the IC in order to keep the application design easy.
Compared to CoolSET™-F2 no further external parts are
needed to achieve the lowest Standby Power. An intelligent
Active Burst Mode is used for this Standby Mode. After
entering this mode there is still a full control of the power
conversion by the secondary side via the same optocoupler
that is used for the normal PWM control. The response on
load jumps is optimized. The voltage ripple on V
minimized. V
The usually external connected RC-filter in the feedback line
after the optocoupler is integrated in the IC to reduce the
external part count.
Furthermore a high voltage Startup Cell is integrated into the
IC which is switched off once the Undervoltage Lockout on-
threshold of 15V is exceeded. This Startup Cell is part of the
integrated Depl. CoolMOS™. The external startup resistor is
no longer necessary as this Startup Cell is connected to the
Drain. Power losses are therefore reduced. This increases the
efficiency under light load conditions drastically.
The Soft-Start capacitor is also used for providing an
adjustable blanking window for high load jumps. During this
time window the overload detection is disabled. With this
concept no further external components are necessary to
adjust the blanking window.
An Auto Restart Mode is implemented in the IC to reduce the
average power conversion in the event of malfunction or
unsafe operating condition in the SMPS system. This feature
increases the system’s robustness and safety which would
otherwise lead to a destruction of the SMPS. Once the
malfunction is removed, normal operation is automatically
initiated after the next Start Up Phase.
The internal precise peak current limitation reduces the costs
for the transformer and the secondary diode. The influence
of the change in the input voltage on the power limitation can
be avoided together with the integrated Propagation Delay
Compensation. Therefore the maximum power is nearly
independent on the input voltage which is required for wide
range SMPS. There is no need for an extra over-sizing of the
SMPS, e.g. the transformer or the secondary diode.
Version 2.0
Functional Description
Introduction
out
is further on well controlled in this mode.
out
is
11
3.2
Figure 6
The Undervoltage Lockout monitors the external supply
voltage V
the internal Startup Cell is biased and starts to charge the
external capacitor C
This VCC charge current which is provided by the Startup
Cell from the Drain pin is 1.05mA. When V
on-threshold V
bias circuit are switched on. Then the Startup Cell is
switched off by the Undervoltage Lockout and therefore no
power losses present due to the connection of the Startup
Cell to the Drain voltage. To avoid uncontrolled ringing at
switch-on a hysteresis is implemented. The switch-off of the
controller can only take place after Active Mode was entered
and V
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
Thus it is ensured that at every startup cycle the voltage ramp
at pin SoftS starts at zero.
VCC
VCC
VCC
VCC
falls below 8.5V.
Depl. CoolMOS™
Undervoltage Lockout
8.5V
Power Management
falls below the off-threshold V
. When the SMPS is plugged to the main line
T1
Power Management
CCon
=15V the internal voltage reference and
VCC
Startup Cell
15V
SoftS
which is connected to the VCC pin.
Functional Description
Active Burst
Internal Bias
Auto Restart
CoolSET™-F3
Reference
Mode
Voltage
Mode
Power
Management
SoftS
VCC
24 Aug 2005
CCoff
at pin SoftS.
exceeds the
Drain
=8.5V the
6.5V