參數(shù)資料
型號(hào)： NCP1381
廠(chǎng)商： ON SEMICONDUCTOR
英文描述： Low−Standby High Performance PWM Controller
文件頁(yè)數(shù)： 5/26頁(yè)
文件大小： 559K
代理商： NCP1381
NCP1381
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
(For typical values T
J
= 25
°
C, for min/max values T
J
= 0
°
C to +125
°
C, V
CC
= 12 V unless otherwise noted)
Symbol
Unit
Max
Typ
Min
Pin
Rating
CURRENT COMPARATOR
S
skip
Typical Internal Softstart period when Leaving Skip
100
175
250
s
GOTOSTANDBY
R
GTS
Pin 11 Output Impedance (or R
dson
between Pin 10 and Pin 11 when SW
is Closed)
11
15
R
skip
Skip Adjustment Output Impedance
5
17
25
35
k
V
skip
Default Skip Cycle Level
5
800
mV
Hyst_ratio
Ratio Between the Skip Level and the Skip Comparator Hysteresis
3.4
ADJ_GTS
Threshold of the ADJ_GTS Comparator
1
220
250
280
mV
I
hyst
Internal Current Source that Creates an Adjustable Hysteresis to the
ADJ_GTS Comparator
1
4.0
5.0
6.0
A
DEMAGNETIZATION DETECTION BLOCK
V
th
Input Threshold Voltage (V
pin
3 Decreasing)
3
30
50
80
mV
V
H
Hysteresis (V
pin
3 Increasing)
3
30
mV
VC
H
VC
L
Input Clamp Voltage
High State (I
pin
3 = 3.0 mA)
Low State (I
pin
3 = 3.0 mA)
3
3
9
0.9
10
0.7
12
0.5
V
V
T
dem
DMG Propagation Delay
3
200
ns
C
par
Internal Input Capacitance at V
pin
3 = 1 V
3
10
pF
R
down
Internal Pulldown Resistor
3
20
30
45
k
T
blank
Internal Blanking Delay after T
ON
3
3.5
s
T
sw(min)
Frequency Clamp, Minimum (T
ON
+ T
OFF
)
7.0
8.0
9.0
s
FEEDBACK SECTION
R
up
Internal Pullup Resistor
6
7.5
10
12.5
k
I
ratio
Pin 6 to Current Setpoint Division Ratio (Maximum V
FB
= 5 V)
4.0
Ref
Voltage Reference, I
load
= 1 mA
12
4.75
5.0
5.25
V
I
ref
Reference Maximum Output Current
12
10
mA
PROTECTIONS
V
zenlatch
V
CC
Limitation in Latched Fault Mode
10
6.0
V
Max
tON
Maximum On Time Duration
9
45
s
I
timer
Timer Charging Current
4
7.0
10
13
A
V
timfault
Timer Fault Validation Level
4
3.5
4.0
4.5
V
T
delay
Timeout Before Validating Shortcircuit or GTS, C
t
= 0.22 F
90
ms
V
latchdem
Latching Level On the Demagnetization Input
3
3.7
4.1
4.5
V
T
samp
Sampling Time for V
latchdem
Detection after the End of the T
ON
3
4.0
s
V
latch
Latchoff Level On the Skip Adjustment Pin
5
3.15
3.5
3.85
V
T
DELLATCH
Propagation Delay from Latch Detected to Gate Turned Off (Pin 9
Loaded by 1 nF)
220
ns
VBO
high
Brownout Level High
2
0.45
0.5
0.55
V
VBO
low
Brownout Level Low
2
0.21
0.24
0.275
V
I
BO
Brownout Pin Input Bias Current
2
0.04
A
T
SD
Temperature Shutdown, Maximum Value
140
°
C
TSD
hyst
Hysteresis While in Temperature Shutdown
30
°
C
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