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NCP1381 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP1381
Description  Low−Standby High Performance PWM Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1381 Datasheet(HTML) 5 Page - ON Semiconductor

 
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NCP1381
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS
(For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, VCC = 12 V unless otherwise noted)
Symbol
Unit
Max
Typ
Min
Pin
Rating
CURRENT COMPARATOR
Sskip
Typical Internal Soft−start period when Leaving Skip
100
175
250
ms
GO−TO−STANDBY
RGTS
Pin 11 Output Impedance (or Rdson between Pin 10 and Pin 11 when SW
is Closed)
11
15
W
Rskip
Skip Adjustment Output Impedance
5
17
25
35
k
W
Vskip
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
Ihyst
Internal Current Source that Creates an Adjustable Hysteresis to the
ADJ_GTS Comparator
1
4.0
5.0
6.0
mA
DEMAGNETIZATION DETECTION BLOCK
Vth
Input Threshold Voltage (Vpin 3 Decreasing)
3
30
50
80
mV
VH
Hysteresis (Vpin 3 Increasing)
3
30
mV
VCH
VCL
Input Clamp Voltage
High State (Ipin 3 = 3.0 mA)
Low State (Ipin 3 = −3.0 mA)
3
3
9
−0.9
10
−0.7
12
−0.5
V
V
Tdem
DMG Propagation Delay
3
200
ns
Cpar
Internal Input Capacitance at Vpin 3 = 1 V
3
10
pF
Rdown
Internal Pulldown Resistor
3
20
30
45
k
W
Tblank
Internal Blanking Delay after TON
3
3.5
ms
Tsw−(min)
Frequency Clamp, Minimum (TON + TOFF)
7.0
8.0
9.0
ms
FEEDBACK SECTION
Rup
Internal Pullup Resistor
6
7.5
10
12.5
k
W
Iratio
Pin 6 to Current Setpoint Division Ratio (Maximum VFB = 5 V)
4.0
Ref
Voltage Reference, Iload = 1 mA
12
4.75
5.0
5.25
V
Iref
Reference Maximum Output Current
12
10
mA
PROTECTIONS
Vzenlatch
VCC Limitation in Latched Fault Mode
10
6.0
V
MaxtON
Maximum On Time Duration
9
45
ms
Itimer
Timer Charging Current
4
7.0
10
13
mA
Vtimfault
Timer Fault Validation Level
4
3.5
4.0
4.5
V
Tdelay
Timeout Before Validating Short−circuit or GTS, Ct = 0.22 mF
90
ms
Vlatchdem
Latching Level On the Demagnetization Input
3
3.7
4.1
4.5
V
Tsamp
Sampling Time for Vlatchdem Detection after the End of the TON
3
4.0
ms
Vlatch
Latchoff Level On the Skip Adjustment Pin
5
3.15
3.5
3.85
V
TDELLATCH
Propagation Delay from Latch Detected to Gate Turned Off (Pin 9
Loaded by 1 nF)
220
ns
VBOhigh
Brown−out Level High
2
0.45
0.5
0.55
V
VBOlow
Brown−out Level Low
2
0.21
0.24
0.275
V
IBO
Brown−out Pin Input Bias Current
2
0.04
mA
TSD
Temperature Shutdown, Maximum Value
140
°C
TSDhyst
Hysteresis While in Temperature Shutdown
30
°C


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