ICE2QR0665_10 Datasheet, PDF (15/21 Pages) Infineon Technologies AG – Off-Line SMPS Quasi-Resonant PWM Controller

CoolSET^® - Q1
ICE2QR0665
Electrical Characteristics
4.3.7
Digital Zero Crossing
Parameter
Symbol
Zero crossing threshold voltage V_ZCCT
Ringing suppression threshold
V_ZCRS
Minimum ringing suppression time t_ZCRS1
Maximum ringing suppression
time
t_ZCRS2
Threshold to set Up/Down Counter V_FBR1
to one
Threshold for downward counting V_FBZHL
at low line
Threshold for upward counting at V_FBZLL
low line
Threshold for downward counting V_FBZHH
at hig line
Threshold for upward counting at V_FBZLH
highline
ZC current for IC switch threshold I_ZCSH
to high line
ZC current for IC switch threshold
to low line
Counter time¹⁾
I_ZCSL
t_COUNT
Limit Values
Unit
min. typ.
max.
50
100
170
mV
-
0.7
-
V
1.62
2.5
4.5
µs
-
25
-
µs
3.9
V
3.2
V
2.5
V
2.9
V
2.3
V
-
1.3
-
mA
-
0.8
-
mA
48
ms
Maximum restart time in normal t_OffMax
30
42
57.5
µs
operation
1) _{The parameter is not subjected to production test - verified by design/characterization}
Test Condition
V_ZC > V_ZCRS
V_ZC < V_ZCRS
4.3.8
Active Burst Mode
Parameter
Symbol
Feedback voltage for entering
Active Burst Mode
Minimum Up/down value for
entering Active Burst Mode
Blanking time for entering Active
Burst Mode
Feedback voltage for leaving
Active Burst Mode
Feedback voltage for burst-on
Feedback voltage for burst-off
V_FBEB
N_{ZC_ABM}
t_BEB
V_FBLB
V_FBBOn
V_FBBOff
Limit Values
Unit
min. typ.
max.
-
1.25
-
V
7
-
24
-
ms
-
4.5
-
V
-
3.6
-
V
3.0
V
Test Condition
Version 2.3
15
April 27, 2010