ICE2QR4765_12 Datasheet, PDF (14/22 Pages) Infineon Technologies AG – Off-Line SMPS Quasi-Resonant PWM Controller with integrated 650V Startup Cell/Depletion CoolMOS In DIP-8

CoolSET^® - Q1
ICE2QR4765
Electrical Characteristics
4.3.3
PWM Section
Parameter
Feedback Pull-Up Resistor
PWM-OP Gain
Offset for Voltage Ramp
Maximum on time in normal
operation
Symbol
R_FB
G_PWM
V_PWM
t_OnMax
min.
14
3.18
0.6
22
Limit Values
typ.
max.
23
33
3.3
-
0.7
-
30
41
Unit
kΩ
-
V
μs
Test Condition
4.3.4
Current Sense
Parameter
Symbol
Peak current limitation in normal V_CSth
operation
Leading Edge Blanking time
Peak Current Limitation in
Active Burst Mode
t_LEB
V_CSB
Limit Values
Unit
min. typ.
max.
0.97 1.03 1.09 V
200
330
460
ns
0.29 0.34 0.39 V
Test Condition
4.3.5
Soft Start
Parameter
Symbol
Soft-Start time
soft-start time step
Internal regulation voltage at
first step
Internal regulation voltage step
at soft start
t_SS
t_{SS_S1)}
V_SS11)
V_{SS_S1)}
Limit Values
Unit
min. typ.
max.
8.5
12
-
ms
-
3
-
ms
-
1.76 -
V
-
0.56 -
V
Test Condition
1) _{The parameter is not subjected to production test - verified by design/characterization}
4.3.6
Foldback Point Correction
Parameter
Symbol
ZC current first step threshold
ZC current last step threshold
CS threshold minimum
I_{ZC_FS}
I_{ZC_LS}
V_CSMF
Limit Values
Unit
min. typ.
max.
0.35 0.5
0.621 mA
1.3
1.7
2.2
mA
-
0.66 -
V
Test Condition
I_zc=2.2mA, V_FB=3.8V
Version 2.3
14
November 14, 2012