ncp1927 ON Semiconductor, ncp1927 Datasheet - Page 8

• Manufacturer Part Number: ncp1927
• Description: Combination Power Factor Correction Controller And Flyback Controller For Flat Panel Tvs
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
1 V, V
values T
PFC ZERO CURRENT DETECTION
PFC SKIP MODE
PFC REGULATION BLOCK
GO TO STANDBY (GTS)
PFC FAULT PROTECTION
3. Guaranteed by design
Clamp Voltage
Minimum detectable ZCD pulse width
Maximum Off Time
Input Bias Current
Skip Pin Internal Current Source
Hysteresis of the skip cycle detection
level
Voltage Reference
Error Amplifier Current Capability
Maximum Source Current
Maximum Sink Current
Error Amplifier Transconductance
PFB Bias Current
Maximum EA Output Voltage
Minimum EA Output Voltage
EA Output Regulation Voltage Swing
Ratio (V
V
V
Source Current During V
Detect
Internal Pull−Down Resistor
Standby Threshold
Standby Hysteresis
Go To Standby Timer
Overvoltage Protection Threshold
Overvoltage Protection Hysteresis
Overvoltage Protection Filter Delay
Undervoltage Protection Threshold
Undervoltage Protection Hysteresis
Undervoltage Protection Filter Delay
out
REF
Upper Clamp
Negative Clamp
Low Detect / V
)
PSKIP
out
J
= 25°C, for min/max values, T
Low Detect Threshold /
Characteristics
= 0 V, V
REF
FFB
= 2.4 V, V
Hysteresis
OUT
Low
FCS
= 0 V, V
J
is − 25°C to 125°C, unless otherwise noted)
(V
CC
PDRV off = 10% to PDRV on = 90%
V
V
Shutdown
PControl
PControl
V
= 12 V, V
V
V
PControl(MAX)
Step V
Step V
V
PFB
PFB
PFB
V
= 2.4 V, V
= 2.6 V, V
= open, C
= open, C
Test Condition
V
= 0 V, V
I
GTS
= V
V
I
PZCD
V
V
GTS
GTS
V
PZCD
PZCD
PFB
V
V
POVUV
http://onsemi.com
PSKIP
PFB
PZCD
PFB
PFB
REF
Decreasing
from 1 V to 0 V
from 0 V to 1 V
= 2.4 V, V
= −2 mA
= −0.2 V
= 2.5 V
= 3 mA
− V
= 2 V
= 3 V
IENABLE
$ 100 mV,
= 5 V
= 1 V
POVUV
POVUV
= 3 V
PControl
PControl
PControl(MIN)
8
POVUV
= 3 V
= 3 V
= open, C
= 10 nF
= 10 nF
= 2.3 V, V
PCT
V
= 1 nF, C
I
V
V
V
V
PControl(boost)
V
PControl(MAX)
V
I
I
PControl(MIN)
DV
t
V
t
OLOW
OLOW(HYS)
standby(HYS)
PControl
V
PZCD(bias)
PZCD(bias)
V
PSKIP(HYS)
I
delay(OVP)
delay(UVP)
I
I
Symbol
V
t
PFB(bias)
t
OVP(HYS)
UVP(HYS)
EA(SRC)
EA(SNK)
GTS(off)
GTS(on)
CL(NEG)
I
CL(POS)
t
R
V
V
V
V
PSKIP
standby
SYNC
t
PControl
gm
start
OVP
REF
REF
GTS
UVP
/V
PDRV
REF
= 4 V, V
/
= 1 nF, C
PZCD
2.463
2.450
−0.9
−0.5
5.05
0.35
95.0
37.5
Min
100
190
270
285
4.7
75
−2
−2
27
10
16
16
80
85
30
20
20
8
−
−
−
−
= 0 V, V
FDRV
2.500
2.500
−0.7
95.5
50.0
Typ
180
200
240
200
300
100
300
5.6
0.6
5.0
10
70
30
12
20
20
50
40
30
40
30
= 1 nF, for typical
−
−
−
−
PCS
= 0 V, V
2.537
2.550
Max
96.0
62.5
100
300
300
290
320
330
125
315
0.5
6.1
0.8
5.3
1.0
12
33
16
24
24
70
60
60
0
2
2
−
−
GTS
Unit
mV
mV
mV
mV
mV
kW
ms
mA
mA
mA
mA
mA
mS
mA
mA
ns
ms
ms
ms
ms
%
%
%
V
V
V
V
V
V
=