NCP1271 ON Semiconductor, NCP1271 Datasheet - Page 4

• Manufacturer Part Number: NCP1271
• Description: Soft?skip? Mode Standby Pwm Controller With Adjustable Skip Level And External Latch
• Manufacturer: ON Semiconductor

5. Please refer to Figure 39 for detailed description.
6. Guaranteed by design.
ELECTRICAL CHARACTERISTICS
HV = open, skip = open, FB = 2 V, CS = Ground, DRV = 1 nF, unless otherwise noted.)
OSCILLATOR
GATE DRIVE
CURRENT SENSE
SKIP
EXTERNAL LATCH
SHORT-CIRCUIT FAULT PROTECTION
Oscillation Frequency (65 kHz Version, T
Oscillation Frequency (65 kHz Version, T
Oscillation Frequency (65 kHz Version, T
Oscillation Frequency (100 kHz Version, T
Oscillation Frequency (100 kHz Version, T
Oscillation Frequency (100 kHz Version, T
Oscillator Modulation Swing, in Percentage of f
Oscillator Modulation Swing Period
Maximum Duty Cycle (V
Gate Drive Resistance
Rise Time from 10% to 90% (Drv = 1.0 nF to Gnd)
Fall Time from 90% to 10% (Drv = 1.0 nF to Gnd)
Maximum Current Threshold
Soft-Start Duration
Soft-Skip Duration
Leading Edge Blanking Duration
Propagation Delay (Drv =1.0 nF to Gnd)
Ramp Current Source Peak
Ramp Current Source Valley
Default Standby Skip Threshold (Pin 1 = Open)
Skip Current (Pin 1 = 0 V, T
Skip Level Reset (Note 5)
Transient Load Detection Level to Disable Soft-Skip Mode
Latch Protection Threshold
Latch Threshold Margin (V
Noise Filtering Duration
Propagation Delay (Drv = 1.0 nF to Gnd)
Time for Validating Short-Circuit Fault Condition
Output High (V
Output Low (V
CC
CC
= 14 V, Drv = 1.0 V)
= 14 V, Drv = 300 W to Gnd)
CS
latch-m
Characteristic
= 0 V, V
J
= 25_C)
= V
FB
CC(off)
= 2.0 V)
(For typical values T
J
J
J
J
J
J
= 25_C)
= -40 to + 85_C)
= -40 to + 125_C)
- V
= 25_C)
= -40 to +85_C)
= -40 to +125_C)
osc
latch
)
http://onsemi.com
J
NCP1271
= 25°C, for min/max values, T
4
Pin
5
5
5
5
5
5
5
3
-
-
3
-
3
3
2
1
1
2
1
1
1
1
2
V
Symbol
V
I
I
skip-reset
t
ramp(H)
ramp(L)
V
T
D
V
V
latch-m
protect
R
I
R
t
I
f
Limit
t
t
LEB
skip
latch
osc
latch
max
SS
SK
skip
TLD
-
-
t
t
-
-
OH
OL
r
f
J
= -40°C to +125°C, V
61.75
0.95
Min
100
6.0
2.0
5.0
2.6
7.1
0.6
58
55
95
89
85
75
26
-
-
-
-
-
-
-
-
-
-
-
-
-
"7.5
2.85
Typ
100
100
100
300
180
100
100
130
6.0
6.0
1.0
4.0
1.2
5.7
8.0
1.2
65
65
65
80
30
20
50
43
13
11
0
CC
= 14 V,
68.25
Max
1.05
3.15
105
107
107
330
150
6.5
8.7
69
69
85
20
12
56
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
kHz
ms
ms
ms
ns
ns
ms
ns
ns
mA
mA
mA
ms
ns
%
%
W
V
V
V
V
V
V