NCP1351 ON Semiconductor, NCP1351 Datasheet - Page 8

• Manufacturer Part Number: NCP1351
• Description: Variable Off Time Controller Featuring Short-circuit Protection
• Manufacturer: ON Semiconductor

1. Guaranteed by design.
Electrical Characteristics
unless otherwise noted)
SUPPLY SECTION AND V
CURRENT SENSE
TIMING CAPACITOR
FEEDBACK SECTION
DRIVE OUTPUT
Protection
VCC
VCC
ICC
V
V
VCT
Symbol
V
V
VCT
VCC
I
V
V
T
V
K
T
I
I
I
FBcomp
I
I
I
OFFSET
I
DRVhigh
CSmax
CSmax
ICC1
ICC2
ICC3
ICC4
CSmin
CSmin
t
FAULT
DRVlow
TIMER
ZENER
DISCH
FBred
R
TIMER
TIMER
LATCH
V
FAULT
FAULT
R
delay
V
I
LATCH
T
T
CT
TH
OH
FB
OL
STOP
HYST
MAX
r
MIN
f
ON
V
V
Hysteresis VCC
Clamped V
Startup Current
Internal IC Consumption with I
Internal IC Consumption with I
Internal IC Consumption in Auto-Recovery Latch-off Phase
Current Flowing into V
Minimum Source Current (I
Minimum Source Current (I
Maximum Source Current (I
Maximum Source Current (I
Current Sense Comparator Threshold Voltage
Propagation Time Delay (CS Falling Edge to Gate Output)
Minimum Voltage on C
Voltage on C
Source Current (Ct Pin Grounded)
Minimum Voltage on C
C
C
Factor Linking V
FB Pin Voltage for an Injected Current of 200 mA
FB Current Under Which a Fault is Detected
FB Current at Which CS Compression Starts
FB Current at Which CS Compression is Finished
Output Voltage Rise-time @ CL = 1 nF, 10 - 90% of Output Signal
Output Voltage Fall-time @ CL = 1 nF, 10 - 90% of Output Signal
Source Resistance
Sink Resistance
DRV Pin Level at V
DRV Pin Level at V
Timing Capacitor Charging Current
Fault Voltage on Pin 8
Fault Timer Duration, C
Latching Voltage
CC
CC
T
T
Capacitor Discharge Time (Activated at DRV Turn-on)
Capacitor Level at Which Fault Timer Starts
Increasing Level at Which Driving Pulses are Authorized
Decreasing Level at Which Driving Pulses are Stopped
CC
T
CC
When Latched Off
Capacitor at I
ON
OFFSET
MANAGEMENT
(For typical values T
CC
CC
- VCC
CC
T
T
Close to VCC
= 28 V with 33 kW Resistor to GND
TIMER
, Discharge Switch Activated
and V
Capacitor, I
pin that Keeps the Controller Latched
STOP
FB
FB
FB
FB
FB
= 100 nF
= 90 mA)
= 90 mA)
FB
FB
FAULT
= 50 mA)
= 50 mA)
= 150 mA
= 50 mA, F
= 50 mA, F
Rating
FB
STOP
(Note 1)
J
= 30 mA
= 25°C, for Min/Max Values T
with a 33 kW Resistor to GND
SW
SW
http://onsemi.com
= 65 kHz and C
= 65 kHz and C
NCP1351
T
T
T
J
J
J
T
T
= -25°C to +125°C
= -25°C to +125°C
= -25°C to +125°C
J
J
C and D Versions
A and B Versions
A and B Versions
8
= 0°C to +125°C
= 0°C to +125°C
C and D Version
C and D Version
T
J
L
L
= 25°C
= 0
= 1 nF
J
= -25°C to +125°C, Max T
Pin
6
6
6
6
6
6
6
6
6
3
3
3
3
3
3
2
2
2
2
2
2
-
1
1
1
1
5
5
5
5
5
5
8
8
-
7
1.67
Min
251
242
475
8.3
9.8
9.3
0.4
8.0
4.5
4.5
15
20
61
58
10
15
10
6
-
-
-
-
-
-
5
-
-
-
-
-
-
-
-
-
-
-
-
J
10.8
10.8
0.96
1.86
11.5
Typ
600
270
270
160
510
100
8.9
1.0
1.6
0.5
0.7
18
70
70
20
40
51
60
80
90
80
30
17
42
= 150°C, V
-
6
-
-
-
-
1
-
5
5
Max
2.05
11.8
11.9
289
289
300
565
9.5
1.8
2.5
0.6
5.5
5.5
22
10
75
75
35
20
20
13
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
CC
= 12 V
Unit
mA
mA
mV
mV
mV
ms
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
ns
ms
ns
ns
W
W
V
V
V
V
V
V
V
V
V
V
V