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參數(shù)資料
| 型號： | NCP1927DR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 531K |
| 描述： | IC CTLR PFC/FLYBACK 16-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
NCP1927
http://onsemi.com
6
ELECTRICAL CHARACTERISTICS (V
CC
= 12 V, V
PFB
= 2.4 V, V
POVUV
= 2.3 V, V
PControl
= 4 V, V
PZCD
= 0 V, V
PCS
= 0 V, V
GTS
=
1 V, V
PSKIP
= 0 V, V
FFB
= 2.4 V, V
FCS
= 0 V, V
Shutdown
= 0 V, V
IENABLE
= open, C
PCT
= 1 nF, C
PDRV
= 1 nF, C
FDRV
= 1 nF, for typical
values T
J
= 25癈, for min/max values, T
J
is 25癈 to 125癈, unless otherwise noted)
Characteristics
Test Condition
Symbol
Min
Typ
Max
Unit
SUPPLY CIRCUIT
Supply Voltage
Startup Threshold
Minimum Operating Voltage
Internal latch reset level
V
CC
increasing, dV/dt = 1.25 mV/ms
V
CC
decreasing, dV/dt = 125 mV/ms
V
CC
decreasing
V
CC(on)
V
CC(off)
V
CC(reset)
16
8
5.0
17
9
6.5
18
10
8.0
V
Supply Current
PFC is switching at 70kHz
PFC is switching at 70kHz
Flyback Switching, PFC is in GTS
During Faults
Startup
C
FDRV
= open, C
PDRV
= open
V
FFB
= V
fold
0.2 V, C
FDRV
= open,
V
FCS
= 0.8 V
V
CC
= V
CC(on)
0.2 V
I
CC1
I
CC2
I
CC3
I
CC4
I
CC5
2.4
3.8
1.0
1.0
3.3
5.1
1.5
1.5
4.2
6.4
2.0
2.5
20
mA
mA
mA
mA
mA
FLYBACK FEEDBACK
Equivalent Internal PullUp Resistor
R
FFB
14
20
31
kW
V
FFB
to Internal Current Setpoint
Division Ratio
K
FFB
4.8
5.0
5.2
Overload Detection Filter
t
delay(FOVLD)
10
ms
Flyback Fault Timer
V
FFB
= 4.5 V to FDRV turnoff
t
FOVLD
60
80
100
ms
FFB Pin Voltage
V
FFB
= open
V
FFB(open)
4.5
5.0
5.5
V
FLYBACK CURRENT SENSE
Current Sense Voltage Threshold
V
FFB
= 4.5 V
V
ILIM
0.655
0.700
0.725
V
Leading Edge Blanking Duration
t
LEB
190
250
310
ns
Propagation Delay
Current Sense Voltage Threshold
Immediate Fault Protection
Step V
FCS
0 V to 2 V, to FDRV
falling edge
t
delay(ILIM)
t
CS(stop)
80
80
110
110
ns
ns
Immediate Fault Protection Threshold
V
FFB
= 3 V, V
FCS
dV/dt = 500 mV/ms
V
CS(stop)
0.95
1.05
1.15
V
Leading Edge Blanking Duration for
I
CS(stop)
t
LEB(stop)
90
120
150
ns
Input Bias Current
V
FCS
= V
ILIM
I
FCS(bias)
1
+1
mA
Current Sourced by the FCS Pin
V
FCS
= 0 V, 80% Duty Ratio
I
ramp(MAX)
100
150
200
FLYBACK SOFTSTART
SoftStart Period
1
st
FDRV pulse to V
FCS
= V
ILIM
t
SSTART
2.8
4.0
5.2
ms
OSCILLATOR
Base Oscillator Frequency
f
OSC
60
65
70
kHz
Maximum Duty Ratio
D
MAX
76
80
84
%
Frequency Modulation in Percentage of
f
OSC
f
MOD
$6
%
Frequency Modulation Frequency
f
jitter
125
Hz
Oscillator Frequency Voltage Stability
V
CC(MIN)
< V
CC
< V
CC(MAX)
f
OSC(VSTAB)
1
+1
%
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