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NCP1937C4DR2G Datasheet(PDF) 9 Page - ON Semiconductor

Part # NCP1937C4DR2G
Description  Combination Power Factor Correction and Quasi-Resonant Flyback Controllers for Adapters
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1937C4DR2G Datasheet(HTML) 9 Page - ON Semiconductor

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NCP1937
www.onsemi.com
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Table 4. ELECTRICAL CHARACTERISTICS: (VCC = 12 V, VBO/X2 = 120 V, VHV/X2 = 120 V, VFault = open, VRPFBHV = 20 V,
VPFBLV = 2.4 V, VPControl = 4 V, VPCS/PZCD = 0 V, VQFB = 3 V, VPONOFF = 4 V, VQCS = 0 V, VQZCD = 0 V, VPSTimer = 0 V, RPFBHV = 200 kW,
CVCC = 100 nF , CQCT = 220 pF, CPDRV = 1 nF, CQDRV = 1 nF, for typical values TJ = 25_C, for min/max values, TJ is – 40_C to 125_C,
unless otherwise noted)
Characteristics
Unit
Max
Typ
Min
Symbol
Pin
Conditions
PFC REGULATION BLOCK
EA Output Control Voltage Range
VPControl(MAX) -
VPControl(MIN)
5
DVPControl
3.8
4.0
4.2
V
Delta Between Minimum Control Voltage and
Lower Clamp PControl Voltages
VPControl(MIN)
VPClamp(lower)
5
DVPClamp(lower)
−125
−100
−75
mV
Ratio between the Vout Low Detect Threshold
and the Regulation Level
VPFBLV decreasing,
VBOOST / VPREF(HL)
VPFBLV decreasing,
VBOOST / VPREF(LL)
18
KLOW(PFCHL)
KLOW(PFCLL)
0.940
0.940
0.945
0.945
0.950
0.950
Ratio between the Vout Low Exit Threshold
and the Regulation Level
VPFBLV increasing
18
KLOW(HYSHL)
KLOW(HYSLL)
0.950
0.950
0.960
0.960
0.965
0.965
Source Current During Vout Low Detect
5
IPControl(boost)
190
240
290
mA
PFC In Regulation Threshold
VPControl increasing
5
IIn_Regulation
−6.5
0
mA
Resistance of Internal Pull Down Switch
IPControl = 5 mA
5
RPControl
4
25
50
W
PFC SKIP MODE
Delta Between Skip Level and Lower Clamp
PControl Voltages
VPControl decreasing,
measured from
VPClamp(lower)
5
DVPSKIP
5
25
50
mV
PFC Skip Hysteresis
VPControl increasing
5
VPSKIP(HYS)
25
50
75
mV
Delay Exiting Skip Mode
Apply 1 V step from
VPClamp(lower)
5
tdelay(PSKIP)
50
60
ms
PFC FAULT PROTECTION
Ratio between the Hard Overvoltage Pro-
tection Threshold and Regulation Level
VPFBLV increasing
KPOVP(LL) =
VPFBLV/VPREF(LL)
KPOVP(HL) =
VPFBLV/VPREF(HL)
18
KPOVP(LL)
KPOVP(HL)
1.06
1.05
1.08
1.06
1.10
1.08
Soft Overvoltage Protection Threshold
VPSOVP(LL) = soft
overvoltage level
DPOVP(LL) = KPOVP *
VPREF(LL) − VPSOVP(LL)
DPOVP(HL) = KPOVP *
VPREF(HL) − VPSOVP(HL)
18
DPOVP(LL)
DPOVP(HL)
20
20
55
55
mV
PFC Feedback Pin Disable Threshold
VPFBLV decreasing
18
VPFB(disable)
0.225
0.30
0.35
V
PFC Feedback Pin Enable Threshold
VPFBLV increasing
18
VPFB(enable)
0.275
0.35
0.40
V
PFC Feedback Pin Hysteresis
VPFBLV increasing
18
VPFB(HYS)
25
50
mV
PFC Feedback Disable Delay
18
tdelay(PFB)
30
ms
PFC ON TIME CONTROL
PFC Maximum On Time
VPControl = VPControl(MAX),
VBO/X2 = 163 V
VBO/X2 = 325 V
15
ton1a
ton1b
12.5
4.25
15
5.00
17.5
5.75
ms
Minimum On−Time
VPControl = VPControl(MIN)
15
tP(on−time)
200
ns
PFC Frequency Clamp
(See Table 2 for device options)
15
fclamp(PFC)
112
215
131
250
150
285
kHz


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