ICE1CS02 Datasheet, PDF (8/27 Pages) Infineon Technologies AG – Combi PFC/ PWM Controller

Combi PFC/ PWM Controller
ICE1CS02
Representative Blockdiagram
2 Representative Blockdiagram
PWM
FB
PWM
Pre-
short
Vref
VCC
5V
Power Management
Internal Bias
Voltage
Reference
Undervoltage Lockout
12V
11V
47% or 60%
Oscillator
Duty Cycle
max
PWM
Section
VREF
10k
GND
PWM
SYNC
/ Duty
Cycle
VREF
&
G10
reset
Soft-start 12ms
Soft-Start
Clock
Comparator
C7
15.4k
25kΩ
2pF
0.4V
C13
3.80V
C9
Internal preshort
function
UVLO
&
PWM
G5
brownout
&
G6
30us
S
Q
R
&
G7
C8
PWM
Comparator
30uA
30kΩ
0.6V
0.4V
x3.2
PWM OP
S
Q
R
leb
C6
1.0V
0.9V
ICE1CS02 - PWM Portion
Gate Driver
FF1
1
S
&
G8
RQ
G9
PWM_OUT
C10
Iramp_max = 150µA
Iramp
47% = OFF
60% = ON
Current Limiting
1V _Leading
Vsync
10kΩ
Edge
Blanking
1pF D1
220ns
R ^50us
QS
Blanking time
PWM
brownout
with
softstart
1.95V
C11
C12
2.85V
PWM
CS
VINS
VINS
HYS
PFC
ISENSE
PFC
ICOMP
ICE1CS02 - PFC Portion
Peak Current Limit
1.25V
Brown-Out
Detection
±100uA
C5
30us
PFC
brownout
with
softstart
Current Sense
Opamp
1.43x
OP1
BUF1
C2
1.0V
Over-current
Comparator
Sychronized Oscillator
fpfc:fpwm =1:2
OSC CLK
Toff min
7.5% D
400ns
1
Ramp
G2
Generator
C1
PWM
Comparator
36k
disch_ramp
Current Loop
Current Loop 7k
Compensation
OTA2
+/-
50uA
1.0mS
400
4V
Nonlinear
Gain
Nonlinear
TF
M2
M
M1
Vin
PWM
Logic
1
S
G4
R
S
R
1
G3
Gate Driver
disch_ramp
Protection Block
UVLO
1
G1
protect
C3
0.6V
open-loop detect
2.6V
C4
PFC
brownout
30us
S
R
Voltage Loop
3.15V
C14
C15
3.0V
+/-30uA, 42uS
OTA1
3V
2.85V
3.15V
+ve
0
-ve
Window Detect
BUF
Fault
PFC_OUT
PFC
VSENSE
PFC
OVP
PFC
VCOMP
Figure 2 Representative Blockdiagram
Version 1.0
8
25 July 2008