ICE1CS02G Infineon Technologies, ICE1CS02G Datasheet - Page 15

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ICE1CS02G

Manufacturer Part Number
ICE1CS02G
Description
IC PFC CTRLR AVERAGE CURR DSO16
Manufacturer
Infineon Technologies
Datasheet

Specifications of ICE1CS02G

Mode
Average Current
Frequency - Switching
65kHz
Current - Startup
1.3mA
Voltage - Supply
11 V ~ 25 V
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
DSO-16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SP000444092
SP000783614
is a built-in function and it is controlled by an internal
counter.
When the V
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
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
soft start will be finished in 12msec. At the end of the
soft start period, the current sink will be switched off.
Figure 19
During Soft Start phase, the voltage at pin 12 (PWM
FB) follows the soft start level with an offset, V
V
Version 1.0
offset
Vsense
2.85V
.
V
V
SoftS
V
SoftS2
SoftS1
SoftS
voltage is set by the current sinks, a resistor
sense
Softstart Phase
exceeds the on-threshold voltage
FB
will increase gradually. The
SoftS
+
15
Figure 20
3.5.2
Figure 21
3.5.3
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
Comparator
Comparator
Soft Start
Current
Limiting
Soft Start
PWM
Counter
Duty Cycle
Oscillator
Clock
max
Combi PFC/ PWM Controller
PWM Section
Oscillator
Softstart Circuit
PWM Section
8I
0.47
G8
Functional Description
1
4I
S
R
FF1
Q
2I
max
Gate Driver
ICE1CS02
25 July 2008
PW M Section
G9
&
=0.47 or 0.60.
R
Gate
SoftS
5V
I
SoftS

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