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NCP1937B3DR2G PDF даташит

Спецификация NCP1937B3DR2G изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «Combination Power Factor Correction and Quasi- Resonant Flyback Controllers».

Детали детали

Номер произв NCP1937B3DR2G
Описание Combination Power Factor Correction and Quasi- Resonant Flyback Controllers
Производители ON Semiconductor
логотип ON Semiconductor логотип 

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NCP1937B3DR2G Даташит, Описание, Даташиты
NCP1937
Combination Power Factor
Correction and Quasi-
Resonant Flyback
Controllers for Adapters
This combination IC integrates power factor correction (PFC) and
quasiresonant flyback functionality necessary to implement a
compact and highly efficient Switched Mode Power Supply for an
adapter application.
The PFC stage exhibits nearunity power factor while operating in a
Critical Conduction Mode (CrM) with a maximum frequency clamp.
The circuit incorporates all the features necessary for building a robust
and compact PFC stage while minimizing the number of external
components.
The quasiresonant currentmode flyback stage features a
proprietary valleylockout circuitry, ensuring stable valley switching.
This system works down to the 4th valley and toggles to a frequency
foldback mode with a minimum frequency clamp beyond the 4th
valley to eliminate audible noise. Skip mode operation allows
excellent efficiency in light load conditions while consuming very low
standby power consumption.
Common General Features
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MARKING DIAGRAM
1
HV/X2
20
PFBHV
BO/X2
SOIC20
Narrow Body
PControl
PONOFF
QCT
CASE 751BS Fault
PSTimer
QFB
PFBLV
GND
PCS/PZCD
PDRV
QDRV
QCS
VCC
QZCD
NCP1937 = Specific Device Code
xx = A1, A2, A3, B1, B2, B3, C1, C4 or C61
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = PbFree Package
Wide VCC Range from 9 V to 30 V with Builtin Overvoltage
Protection
HighVoltage Startup Circuit and Active Input Filter Capacitor
Discharge Circuitry for Reduced Standby Power
ORDERING INFORMATION
See detailed ordering and shipping information on page 5 of
this data sheet.
Integrated HighVoltage BrownOut Detector
Integrated HighVoltage Switch Disconnects PFC Feedback Resistor
Divider to Reduce Standby Power
Fault Input for Severe Fault Conditions, NTC
FeedForward for Improved Operation across Line and
Compatible (Latch and AutoRecovery Options)
Load
0.5 A / 0.8 A Source / Sink Gate Drivers
Adjustable PFC Disable Threshold Based on Output
Internal Temperature Shutdown
Power
Power Savings Mode Reduces Supply Current
Consumption to 70 mA Enabling Very Low Input Power
Applications
QR Flyback Controller Features
Valley Switching Operation with ValleyLockout for
NoiseFree Operation
PFC Controller Features
Critical Conduction Mode with Constant On Time
Control (Voltage Mode) and Maximum Frequency
Frequency Foldback with Minimum Frequency Clamp
for Highest Performance in Standby Mode
Minimum Frequency Clamp Eliminates Audible Noise
Clamp
Accurate Overvoltage Protection
TimerBased Overload Protection (Latched or
AutoRecovery options)
BiLevel LineDependent Output Voltage
Adjustable Overpower Protection
Fast Line / Load Transient Compensation
Winding and Output Diode ShortCircuit Protection
Boost Diode ShortCircuit Protection
4 ms SoftStart Timer
© Semiconductor Components Industries, LLC, 2013
November, 2013 Rev. 3
1
Publication Order Number:
NCP1937/D









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NCP1937B3DR2G Даташит, Описание, Даташиты
NCP1937
Figure 1. Typical Application Circuit
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NCP1937B3DR2G Даташит, Описание, Даташиты
NCP1937
PFBHV
20
PFBLV
18
Enable
PFC
PUVP
+ VPFB(HYS)
VPFB(disable)
Latch
Autorecovery
LineVRCeCm(reosveat)l
KPOVP(xL)
PFC
OVP
POVP
Brownout
Low/High Line
DPOVP(xL) Detection
VCC_OK
IPControl(boost)
In PSM
KLOW KLOW(HYS)
Low/High Line QR_EN
Central
Logic
Softstart
Low/High Line
Brownout
Line Removal
QR_EN
VCC_OK
In PSM
High Voltage
Startups,
Detection, and
Logic
Reset
VVCCCC_OOVKP
VCC(rVesDeDt)
VCC
Management
Istart
Line Removal
VQILIM1
ICC(discharge)
BO/X2
3
HV/X2
1
VCC
12
CCC
PControl
5
PDRV
15
+
VPREF(xL)
IEA
In Regulation
VPCONTROL(MAX)
CLlaomwp
PUVP
Disable PFC
PSKIP
+DVPSKIP
In Regulation PPOUVVPP
PFCDRV PPISLKIMIP1
PILIM2
ON Time
Ramp
Level
Shift
PFCDRV
VQFB
QZCD
SoftStart
Disable PFC
tPisable
VPONHYS
IPONOFF
+
VPOFF
PONOFF
6
RQ
Dominant
Reset Latch
SQ
PFCDRV
RQ
SDoRLmaetsicnehatntQ
Valley
QRDRV
QDRV
14
tQ(toutx)
ZCD
Detect
Softstart
VQZCD
QZCD
11
PILIM2
PFCDRV
PFCDRV
tPTFimC(eorff)
Frequency
Clamp
tdelay(QSKIP)
QSkip
VQZCD(hys)
VQZCD(th)
Minimum
Frequency
Oscillator
VCO
CT
Setpoint
QRDRV
VQFB
IQCT
QCT
PCS/PZCD
16
Fault
8
ZCD
Detect
+VPZCD
PZCD
LEB1
PZCD
tP(tout)
PILIM1
+
VPILIM1
PILIM2
LEB2 +
Counter nPILIM2
IOTP
VPILIM2
OVP
VFault(OVP)
OTP
TSD
QOVLD
nQILIM2
nPILIM2
OVP
VCCOOTVPP
S
S
S
S
S
S
S
Fault
Logic
VCO
QRDRV
7
QSkip
tonQR(MAX)
QRDRV
Latch
Valley
QSkip
VCO
IQFB
RQFB
Valley In_PSM
Select
Logic
VQFB
QFB
10
+ /KQFB
VQZCD
GND
17
QILIM1
Autorecovery
LEB1
PSTIMER
9
VFault(OTP_in)
IPSTimer1/2
Line Removal
Brownout
VCC(reset)
In_PSM PSM
Detection
In PSM
R
R
R
Temperature
TSD
QOVLD
nQILIM2
tQOVLD
QILIM2
Counter
VQZCD +
VQILIM1
LEB2
IQCS
QCS
13
Initial Discharge VCC_OK
VQILIM2
Figure 2. Functional Block Diagram
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Номер в каталогеОписаниеПроизводители
NCP1937B3DR2GCombination Power Factor Correction and Quasi- Resonant Flyback ControllersON Semiconductor
ON Semiconductor

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