I
NTEGRATED
C
IRCUITS
D
IVISION
IX9908
4 www.ixysic.com R02
1.6 Electrical Characteristics
T
J
= - 25°C to +125°
1.6.1 Power Supply
Note: The electrical characterization involves the spread of values within the specified supply voltage and junction
temperature range T
J
from - 25°C to +125°C. Typical values represent the median values, which are related to 25°C.
If not otherwise stated, a supply voltage of V
CC
=18V is assumed.
1.6.2 Internal Voltage Reference
1.6.3 PWM Section
1.6.4 Current Sense
1.6.5 Soft Start
Parameter Conditions Symbol Minimum Typical Maximum Unit
V
CC
Charge Current V
CC
=0V I
CCcharge1
--35
mA
V
CC
=V
CCon
-0.2V I
CCcharge2
--35
Maximum Input Current of Startup Cell
V
CC
=V
CCon
-0.2V I
HV
--35mA
Leakage Current of Startup Cell
V
HV
=610V @ T
J
=100°C I
HV
-0.250A
Supply Current in Normal Operation GD Low
I
CCNM
-1.82.9mA
V
CC
Turn-On Threshold
-
V
CCon
17 18 19 V
V
CC
Turn-Off Threshold
-
V
CCoff
9.8 10.5 11.2 V
V
CC
Turn-On/Off Hysteresis
-
V
CChys
-7.5-V
Parameter Conditions Symbol Minimum Typical Maximum Unit
Internal Reference Voltage
Measured at VR Pin, I
VR
=0 V
VR
4.8 5 5.2 V
Parameter Conditions Symbol Minimum Typical Maximum Unit
VR Pull-Up Resistor -
R
VR
14 23 33 k
PWM-OP Gain -
G
PWM
2.95 3 3.05 -
Offset for Voltage Ramp -
V
PWM
0.63 0.7 0.77 V
Maximum On-Time in Normal Operation -
t
onMax
22 30 41 s
Parameter Conditions Symbol Minimum Typical Maximum Unit
Current Sense Threshold -
V
CSTH
0.97 1.03 1.09 V
Leading Edge Blanking Time -
t
BLKCS
200 330 460 ns
Parameter Conditions Symbol Minimum Typical Maximum Unit
Soft-Start Time -
t
SS
8.5 12 - ms
Soft-Start Time Step -
t
SS-S
-3-ms
Internal Regulation Voltage at First Step -
V
SS1
-1.76- V
Internal Regulation Voltage Step at Soft Start -
V
SS-S
-0.56- V
