NCP1236
ELECTRICAL CHARACTERISTICS (continued)
(For typical values T = 25C, for min/max values T = −40C to +125C, V = 125 V, V = 11 V unless otherwise noted)
J
J
HV
CC
Characteristics
Test Condition
Symbol
Min
Typ
Max
Unit
OUTPUT DRIVER
High−state voltage drop
V
= V
+ 0.2 V, R
= 33 kW,
V
DRV(drop)
−
−
1
V
CC
CC(min)
DRV
DRV high
CURRENT SENSE
Input Bias Current
V
V
= 0.7 V
> 3.5 V
I
−
0.02
0.7
−
mA
CS
bias
Maximum internal current
setpoint
V
0.66
0.74
V
FB
ILIM
Propagation delay from V
detection to DRV off
V
CS
= V
t
−
80
110
310
1.15
150
ns
ns
V
Ilimit
ILIM
delay
Leading Edge Blanking Duration
for V
t
190
0.95
90
250
1.05
120
LEB
ILIM
Threshold for immediate fault
protection activation
V
CS(stop)
Leading Edge Blanking Duration
t
ns
BCS
for V
CS(stop)
Slope of the compensation ramp
S
−
−
−32.5
−50
−
−
mV /
ms
comp(65kHz)
S
comp(100kHz)
st
Soft−start duration
From 1 pulse to V = V
t
SSTART
2.8
4.0
5.2
ms
CS
ILIM
OVERPOWER COMPENSATION
V
to I
conversion ratio
K
OPC
−
0.54
−
mA / V
mA
HV
OPC
Current flowing out of CS pin
V
HV
V
HV
V
HV
V
HV
= 125 V
= 162 V
= 325 V
= 365 V
I
−
−
−
0
20
110
130
−
−
−
OPC(125)
OPC(162)
OPC(325)
OPC(365)
I
I
I
105
150
FB voltage above which I
applied
is
V
= 365 V
V
2.12
−
2.35
2.15
32
2.58
−
V
V
OPC
HV
FB(OPCF)
FB(OPCE)
WD(OPC)
FB voltage below which is no
applied
V
HV
= 365 V
V
I
OPC
Watchdog timer for dc operation
FEEDBACK
t
−
−
ms
Internal pull−up resistor
T = 25C
J
R
15
20
5
25
kW
FB(up)
V
FB
to internal current setpoint
K
FB
4.7
5.3
−
division ratio
Internal pull−up voltage on the
FB pin
V
FB(ref)
4.3
5
5.7
V
OVERCURRENT PROTECTION
Fault timer duration
From CS reaching V
From CS reaching V
to DRV stop
to DRV stop
t
t
98
16
128
32
168
48
ms
ms
ILIMIT
fault
Fault timer duration (for the C
version only)
ILIMIT
fault
Autorecovery mode latch−off
t
t
0.85
1.0
1.00
1.5
1.35
2.0
s
s
autorec
time duration
Autorecovery mode latch−off
time duration (for the C version
only)
autorec
6. Internal supply current only, current in FB pin not included (current flowing in GND pin only).
7. Guaranteed by design.
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