ICE2A280ZXK Infineon Technologies, ICE2A280ZXK Datasheet - Page 10

• Manufacturer Part Number: ICE2A280ZXK
• Manufacturer: Infineon Technologies

Specifications of ICE2A280ZXK

• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Topology: Flyback
• Switching Freq: 107KHz
• Duty Cycle: 77%
• Operating Supply Voltage (max): 21V
• Output Current: 2000A
• Output Voltage: 800V
• Synchronous Pin: No
• Rise Time: 30ns
• Fall Time: 30ns
• Operating Temperature Classification: Automotive
• Mounting: Through Hole
• Pin Count: 7
• Package Type: PDIP
• Lead Free Status / Rohs Status: Compliant

3
3.1
Figure 6
The Undervoltage Lockout monitors the external
supply voltage V
current consumption is max. 55µA. When the SMPS is
plugged to the main line the current through R
charges the external Capacitor C
exceeds the on-threshold V
circuit and the voltage reference are switched on. After
that the internal bandgap generates a reference
voltage V
avoid uncontrolled ringing at switch-on a hysteresis is
implemented which means that switch-off is only after
active mode when Vcc falls below 8.5V.
In case of switch-on a Power Up Reset is done by
resetting the internal error-latch in the protection unit.
When V
internal reference is switched off and the Power Down
reset let T1 discharging the soft-start capacitor C
at pin SoftS. Thus it is ensured that at every switch-on
the voltage ramp at pin SoftS starts at zero.
Version 2.6
VCC
C
SoftS
VCC
Soft-Start
REF
8.5V
Functional Description
Power Management
falls below the off-threshold V
Undervoltage
Power-Up
Power Management
Power-Down
=6.5V to supply the internal circuits. To
Reset
Lockout
Reset
T1
R
6.5V
VCC
13.5V
Soft-Start
Power Management
. In case the IC is inactive the
R
Main Line (100V-380V)
Start-Up
C
CCon
VCC
Error-Latch
R
S
Reference
Voltage
Internal
=13.5V the internal bias
Bias
Q
Q
Error-Detection
Soft-Start Comparator
Primary Winding
VCC
PWM-Latch
. When V
CCoff
6.5V
5.3V
4.8V
4.0V
=8.5V the
Soft-Start
Start-up
VCC
10
3.2
Figure 7
Current Mode means that the duty cycle is controlled
by the slope of the primary current. This is done by
comparison the FB signal with the amplified current
sense signal.
Figure 8
In case the amplified current sense signal exceeds the
FB signal the on-time T
resetting the PWM-Latch (see Figure 8).
The primary current is sensed by the external series
resistor R
CoolMOS™. By means of Current Mode regulation, the
0.8V
Driver
FB
Amplified Current Signal
FB
Soft-Start Comparator
Improved
Current Mode
Sense
Improved Current Mode
Current Mode
Pulse Width Modulation
0.8V
T
PWM OP
inserted in the source of the integrated
on
PWM Comparator
x3.65
Functional Description
on
of the driver is finished by
CoolSET™-F2
PWM-Latch
R
S
25 Dec 2006
Isense
Q
Q
Driver
t
t