ICE3AS02 Datasheet, PDF (18/23 Pages) Infineon Technologies AG – Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell

F3
ICE3AS02 / ICE3AS02G / ICE3BS02 / ICE3BS02G
Electrical Characteristics
4.3.4
PWM Section
Parameter
Fixed Oscillator
Frequency
Max. Duty Cycle
ICE3AS02
ICE3AS02G
ICE3BS02
ICE3BS02G
Symbol
f_OSC1
f_OSC2
f_OSC1
f_OSC2
D_max
min.
92
94
61
63
0.67
Limit Values
typ.
max.
100
108
100
106
67
73
67
71
0.72 0.77
Min. Duty Cycle
D_min
0
-
-
Unit
kHz
kHz
kHz
kHz
Test Condition
T_j = 25°C
T_j = 25°C
V_FB < 0.3V
PWM-OP Gain
A_V
3.5
Voltage Ramp Max Level
V_Max-Ramp -
V_FB Operating Range Min Level V_FBmin
0.3
V_FB Operating Range Max level V_FBmax
-
FB Pull-Up Resistor
R_FB
16
SoftS Pull-Up Resistor
R_SoftS
39
3.7
3.9
0.85 -
V
0.7
-
V
-
4.75 V
20
27
kΩ
50
62
kΩ
CS=1V, limited by
Comparator C4¹⁾
1) _{Design characteristic (not meant for production testing)}
4.3.5
Control Unit
Parameter
Deactivation Level for SoftS
Comparator C7 by C2
Clamped V_SoftS Voltage during
Normal Operating Mode
Activation Limit of
Comparator C3
SoftS Startup Current
Symbol
V_SoftSC2
min.
3.85
Limit Values
typ.
max.
4.00 4.15
V_SoftSclmp 4.23
4.40
4.57
V_SoftSC3
5.20
5.40
5.60
I_SoftSstart
-
1.3
-
Over Load & Open Loop Detection V_FBC4
Limit for Comparator C4
Active Burst Mode Level for
Comparator C5
V_FBC5
Active Burst Mode Level for
Comparator C6a
V_FBC6a
4.62
1.23
3.85
4.80
1.30
4.00
4.98
1.37
4.15
Unit
V
V
V
mA
V
V
V
Test Condition
V_FB > 5V
V_FB = 4V
V_FB > 5V
V_SoftS = 0V
V_SoftS > 5.6V
V_SoftS > 5.6V
After Active Burst
Mode is entered
Version 1.1
18
21 May 2004