ICE3A1565 Infineon Technologies, ICE3A1565 Datasheet - Page 10

• Manufacturer Part Number: ICE3A1565
• Description: IC OFFLINE CTRLR SMPS CM 8DIP
• Manufacturer: Infineon Technologies
• Series: CoolSET®F3r
• Type: Off Line Switcherr

Specifications of ICE3A1565

• Package / Case: 8-DIP (0.300", 7.62mm)
• Output Isolation: Isolated
• Frequency Range: 92 ~ 108kHz
• Voltage - Input: 8.5 ~ 22 V
• Voltage - Output: 650V
• Power (watts): 42W
• Operating Temperature: -25°C ~ 130°C
• Output Voltage: 650V
• No. Of Outputs: 1
• Supply Voltage Range: 8.5V To 21V
• Voltage Regulator Case Style: DIP
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +150°C
• Termination: RoHS Compliant
• Input / Supply Voltage (max): 22 V
• Input / Supply Voltage (min): - 0.3 V
• Duty Cycle (max): 72 %
• Switching Frequency: 100 KHz
• Supply Current: 160 uA
• Mounting Style: Through Hole
• Maximum Operating Temperature: + 130 C
• Minimum Operating Temperature: - 25 C
• Output Power: 42 W
• Input Voltage: 265VAC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ICE3A1565X; ICE3A1565XK; SP000015083

The primary current is sensed by the external series
resistor R
CoolMOS™. By means of Current Mode the regulation
of the secondary voltage is insensitive on line
variations. Line variation causes varition of the
increasing current slope which controls the duty cycle.
The external R
the maximum source current of the integrated
CoolMOS™.
Figure 8
To improve the Current Mode during light load
conditions the amplified current ramp of the PWM-OP
is superimposed on a voltage ramp, which is built by
the switch T
low pass filter composed of R
Figure 9). Every time the oscillator shuts down for max.
duty cycle limitation the switch T2 is closed by V
When the oscillator triggers the Gate Driver T2 is
opened so that the voltage ramp can start.
In case of light load the amplified current ramp is to
small to ensure a stable regulation. In that case the
Voltage Ramp is a well defined signal for the
comparison with the FB-signal. The duty cycle is then
controlled by the slope of the Voltage Ramp.
By means of the Comparator C5, the Gate Driver is
switched-off until the voltage ramp exceeds 0.3V. It
allows the duty cycle to be reduced continously till 0%
by decreasing V
Datasheet V4.5
O scilla to r
F B
V oltage R am p
S o ft-S ta rt C o m p a ra to r
V
O S C
Sense
Improved Current Mode
2
T
, the voltage source V
2
inserted in the source of the integrated
Sense
C
FB
1
0 .3 V
below that threshold.
allows an individual adjustment of
1 0 k
R
2 0 p F
1
P W M C o m p a ra to r
C 5
1
0.8V
and C
V
1
G a te D rive r
P W M -L a tch
1
and the 1st order
1
(see Figure 8,
P W M O P
x3 .6 5
OSC
.
10
Figure 9
3.2.1
The input of the PWM-OP is applied over the internal
leading edge blanking to the external sense resistor
R
source current into a sense voltage. The sense voltage
is amplified with a gain of 3.65 by PWM OP. The output
of the PWM-OP is connected to the voltage source V1.
The voltage ramp with the superimposed amplified
current singal is fed into the positive inputs of the PWM-
Comparator, C5 and the Soft-Start-Comparator.
3.2.2
The PWM-Comparator compares the sensed current
signal of the integrated CoolMOS
signal V
external
combination with the internal pullup resistor R
provides the load information of the feedback circuitry.
When the amplified current signal of the integrated
CoolMOS™ exceeds the signal V
Comparator switches off the Gate Driver.
Sense
0.8V
0.3V
Voltage Ramp
Gate Driver
FB
V
connected to pin ISense. R
OSC
FB
optocoupler
PWM-OP
PWM-Comparator
Light Load Conditions
(see Figure 10). V
Duty Cycle
max.
Functional Description
or
external
FB
CoolSET™-F2
TM
is created by an
Sense
with the feedback
FB
transistor
converts the
the PWM-
Jan 2004
FB
t
and
t
t
in