Datasheet

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