ICE1CS02G Infineon Technologies, ICE1CS02G Datasheet - Page 14

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

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

Figure 16
3.4.15
Due to the low frequency bandwidth of the voltage loop,
the dynamic response is slow and in the range of about
several 10ms. This may cause additional stress to the
bus capacitor and the switching transistor of the PFC in
the event of heavy load changes.
The IC provides therefore a “window detector” for the
feedback voltage V
Whenever V
by +5%, it will act on the nonlinear gain block which in
turn affect the gate drive duty cycle directly. This
change in duty cycle is bypassing the slow changing
VCOMP voltage, thus results in a fast dynamic
response of V
3.4.16
The output gate driver is a fast totem pole gate drive. It
has an in-built cross conduction currents protection and
a Zener diode Z1 (see Figure 18) to protect the external
transistor switch against undesirable over voltages.
The maximum voltage at pin 6 (PFC OUT) is typically
clamped at 15V.
The output is active HIGH and at VCC voltages below
the under voltage lockout threshold VCCUVLO, the
gate drive is internally pull low to maintain the off state.
Version 1.0
Full-wave
Retifier
Av(I
From
V
IN
IN
)
PWM Generation
Current Loop
Enhanced Dynamic Response
R7
Output Gate Driver
Voltage Loop
L1
VSENSE
+
OUT
Nonlinear
t
.
Gain
exceeds the reference value (3V)
VSENSE
C4
R6
D1
at pin 2 (PFC VSENSE).
Gate Driver
VCOMP
OTA1
C2
C5
3V
R3
R4
VSENSE
GATE
Vout
14
Figure 17
3.5
3.5.1
Figure 18
In the Startup Phase, the IC provides a Soft Start
period to control the maximum primary current by
means of a duty cycle limitation. The Soft start function
PWM Logic
HIGH to
turn on
* LV: Level Shift
Combi PFC/ PWM Controller
SoftS
Gate Driver
PWM Section
Startup Phase
0.4V
0.6V
Soft Start
Gate Driver
LV
Comparator
Soft-Start
Soft Start counter
C7
Functional Description
PWM OP
Z1
Soft Start
VCC
x3.2
G8
&
ICE1CS02
25 July 2008
GATE
Soft Start
Gate Driver
External
MOS
CS