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参数资料
| 型号： | NCP1927DR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/24页 |
| 文件大小： | 531K |
| 描述： | IC CTLR PFC/FLYBACK 16-SOIC |
| 标准包装： | 2,500 |
| 系列： | * |
NCP1927
http://onsemi.com
8
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
Unit
Max
Typ
Min
Symbol
Test Condition
PFC ZERO CURRENT DETECTION
Zero Current Detection Threshold
Rising
Falling
V
ZCD(rising)
V
ZCD(falling)
1.12
0.56
1.40
0.70
1.68
0.84
V
Hysteresis on Voltage Threshold
V
ZCD(rising)
V
ZCD(falling)
V
ZCD(HYS)
560
700
840
mV
Propagation Delay
Step V
PZCD
from 2 V to 0 V
t
ZCD
100
170
ns
Clamp Voltage
Upper Clamp
Negative Clamp
I
PZCD
= 3 mA
I
PZCD
= 2 mA
V
CL(POS)
V
CL(NEG)
8
0.9
10
0.7
12
0
V
Minimum detectable ZCD pulse width
t
SYNC
70
100
ns
Maximum Off Time
PDRV off = 10% to PDRV on = 90%
t
start
75
180
300
ms
Input Bias Current
V
PZCD
= 5 V
V
PZCD
= 0.2 V
I
PZCD(bias)
I
PZCD(bias)
2
2
2
2
mA
mA
PFC SKIP MODE
Skip Pin Internal Current Source
I
PSKIP
27
30
33
mA
Hysteresis of the skip cycle detection
level
V
PSKIP
= 1 V
V
PSKIP(HYS)
10
12
16
%
PFC REGULATION BLOCK
Voltage Reference
V
REF
2.463
2.500
2.537
V
Error Amplifier Current Capability
Maximum Source Current
Maximum Sink Current
V
PFB
= 2.4 V, V
POVUV
= 3 V
V
PFB
= 2.6 V, V
POVUV
= 3 V
I
EA(SRC)
I
EA(SNK)
16
16
20
20
24
24
mA
mA
Error Amplifier Transconductance
V
PFB
= V
REF
$ 100 mV,
V
POVUV
= 3 V
gm
100
200
300
mS
PFB Bias Current
V
PFB
= 2.5 V
I
PFB(bias)
0.5
0.5
mA
Maximum EA Output Voltage
V
PFB
= 2 V
V
PControl
= open, C
PControl
= 10 nF
V
PControl(MAX)
5.05
5.6
6.1
V
Minimum EA Output Voltage
V
PFB
= 3 V
V
PControl
= open, C
PControl
= 10 nF
V
PControl(MIN)
0.35
0.6
0.8
V
EA Output Regulation Voltage Swing
V
PControl(MAX)
V
PControl(MIN)
DV
PControl
4.7
5.0
5.3
V
Ratio (V
out
Low Detect Threshold /
V
REF
)
V
OLOW
/V
REF
95.0
95.5
96.0
%
V
out
Low Detect / V
REF
Hysteresis
V
OLOW(HYS)
/
V
REF
1.0
%
Source Current During V
OUT
Low
Detect
I
PControl(boost)
190
240
290
mA
GO TO STANDBY (GTS)
Internal PullDown Resistor
R
GTS
80
200
320
kW
Standby Threshold
V
GTS
Decreasing
V
standby
270
300
330
mV
Standby Hysteresis
V
standby(HYS)
85
100
125
mV
Go To Standby Timer
Step V
GTS
from 1 V to 0 V
Step V
GTS
from 0 V to 1 V
t
GTS(off)
t
GTS(on)
37.5
30
50.0
50
62.5
70
ms
ms
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