ICE1CS02G

Manufacturer Part NumberICE1CS02G
DescriptionIC PFC CTRLR AVERAGE CURR DSO16
ManufacturerInfineon Technologies
ICE1CS02G datasheet
 


Specifications of ICE1CS02G

ModeAverage CurrentFrequency - Switching65kHz
Current - Startup1.3mAVoltage - Supply11 V ~ 25 V
Operating Temperature-40°C ~ 150°CMounting TypeSurface Mount
Package / CaseDSO-16Lead Free Status / RoHS StatusLead free / RoHS Compliant
Other namesSP000444092
SP000783614
  
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is a built-in function and it is controlled by an internal
counter.
When the V
exceeds the on-threshold voltage
sense
2.85V, the IC starts the soft start mode. The function is
realized by an internal soft start resistor, an internal
current sink and a internal counter. The amplitude of
the current sink is controlled by a timer.
The V
voltage is set by the current sinks, a resistor
SoftS
and a counter such that the voltage will increase step
wisely with the increase of the counts. Every 0.8ms, the
soft start counter would send a signal to the current
sink control such that the current sink will decrease
gradually and thus the V
will increase gradually. The
FB
soft start will be finished in 12msec. At the end of the
soft start period, the current sink will be switched off.
Vsense
2.85V
V
SoftS
V
SoftS2
V
SoftS1
Figure 19
Softstart Phase
During Soft Start phase, the voltage at pin 12 (PWM
FB) follows the soft start level with an offset, V
V
.
offset
Version 1.0
Combi PFC/ PWM Controller
8I
Soft Start
Counter
Figure 20
Softstart Circuit
3.5.2
PWM Section
0.47
Oscillator
Duty Cycle
max
Clock
Soft Start
Comparator
PWM
G8
Comparator
Current
Limiting
+
SoftS
Figure 21
PWM Section
3.5.3
Oscillator
The switching frequency is generated by an oscillator
which composes of resistor, capacitor, current source
and current sink. The charging and discharging current
for the oscillator capacitor are internally trimmed and it
can provide a very accurate switching frequency. The
ratio of the controlled charge to discharge current is
adjusted to a maximum duty cycle of D
15
ICE1CS02
Functional Description
5V
R
SoftS
SoftS
4I
2I
I
PW M Section
FF1
Gate Driver
S
1
&
R
Q
G9
Gate
=0.47 or 0.60.
max
25 July 2008