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