NCP1339 PDF даташит
Спецификация NCP1339 изготовлена «ON Semiconductor» и имеет функцию, называемую «QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode». |
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Детали детали
Номер произв | NCP1339 |
Описание | QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode |
Производители | ON Semiconductor |
логотип |
30 Pages
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NCP1339
High-Voltage, Quasi-
Resonant Controller
featuring Valley Lock-Out
and Power Saving Mode
The NCP1339 is a highly integrated quasi−resonant flyback
controller capable of controlling rugged and high−performance
off−line power supplies as required by adapter applications. With an
integrated active X−cap discharge feature and power savings mode,
the NCP1339 can enable no−load power consumption below 10 mW
for 45 W notebook adapters.
The quasi−resonant current−mode flyback stage features a
proprietary valley−lockout circuitry, ensuring stable valley switching.
This system works down to the 6th valley and toggles to a frequency
foldback mode to eliminate switching losses. When the loop tends to
force below 25−kHz frequencies, the NCP1339 skips cycles to contain
the power delivery.
To help build rugged converters, the controller features several key
protective features: an internal brown−out, a non−dissipative Over
Power Protection for a constant maximum output current regardless of
the input voltage, a latched over−voltage protection through a
dedicated pin.
Features
• High−voltage Current Source for Lossless Start−up Sequence
• X2 Capacitors Discharge Capability
• Power Savings Mode (PSM) for Extremely Low No−Load Power:
• Wide VCC Range from 10 V to 28 V
• Latching−off 28−V VCC Over−Voltage Protection
• Abnormal Overcurrent Fault Protection for Winding Short Circuit or
Inductor Saturation Detection
• Integrated High−Voltage Startup Circuit with Brown−Out Detection
• Fault Input for Severe Fault Conditions, NTC Compatible for OTP
• Circuit Latching Off In Severe Fault Detection (OVP or OTP)
• Internal Temperature Shutdown
• Valley Switching Operation with Valley−Lockout for Noise−Free
Operation
• Frequency Fold−back for Highest Performance in Standby Mode
• 25−kHz Clamp and Skip Mode
• Timer−Based Overload Protection (Latched or Auto−Recovery
Options)
• Adjustable Overpower Protection
• 4−ms Soft−Start Timer
• ZCD Blanking Time to Ignore Leakage Ringing at Turn−Off:
3 ms for C, D and E versions and 0.7 ms for F, G or H versions
• These Devices are Pb−Free and are RoHS Compliant
This document contains information on some products that are still under development.
ON Semiconductor reserves the right to change or discontinue these products without
notice.
www.onsemi.com
14
1
SOIC−14 NB
(LESS PIN 13)
D SUFFIX
CASE 751AN
MARKING DIAGRAM
14
NCP1339xG
AWLYWW
1
NCP1339 = Specific Device Code
x = C, D, E, F, G or H
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
X2
REM
OPP
ZCD
Fault
FB
CS
HV
NC
NC
VCC
DRV
GND
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 30 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
August, 2015 − Rev. 3
1
Publication Order Number:
NCP1339/D
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NCP1339
PART NUMBER MATRIX
Device
Version
NCP1339CDR2G
NCP1339DDR2G
NCP1339EDR2G
NCP1339FDR2G
NCP1339GDR2G
NCP1339HDR2G
NCP1339C
NCP1339D
NCP1339E
NCP1339F
NCP1339G
NCP1339H
Overload
Protection
Autorecovery
Latching−off
Latching−off
Latching−off
Autorecovery
Autorecovery
Abnormal Overcurrent
Fault
Autorecovery
Latching−off
Latching−off
Latching−off
Autorecovery
Autorecovery
ZCD Blanking
Time
3 ms
3 ms
3 ms
0.7 ms
0.7 ms
0.7 ms
Vaux
Jittering
Function
Disabled
Disabled
Enabled
Enabled
Enabled
Disabled
Vout
N
EMI
Filter
L1
NCP1339
X2 1
14
REM 2
13
3 12
4 11
5 10
FB 6
9
78
CS
Vcc
Figure 1. NCP1339 Typical Application Circuit
GND
PSM_OFF
GND
Rsense
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NCP1339
PIN FUNCTION DESCRIPTION
Pin
Number
Pin
Name
Function
1 X2 When the voltage on this pin disappears, the controller ensures the X2−capacitors discharge.
2
REM
The part operates when the REM pin is forced lower than a certain level and enters the Power Savings
Mode (PSM) otherwise.
3
OPP
A resistive divider from the auxiliary winding to this pin sets the OPP compensation level.
4
ZCD
Input to the demagnetization detection comparator for the QR Flyback controller.
5
Fault
The controller enters fault mode if the voltage of this pin is pulled above or below the fault thresholds. A pre-
cise pull up current source allows direct interface with an NTC thermistor. Fault detection triggers a latch.
6 FB Feedback input for the QR Flyback controller. Allows direct connection to an optocoupler.
7 CS Input to the cycle−by−cycle current limit comparator for the QR Flyback section.
8
GND
Ground reference.
9
DRV
This is the drive pin of the circuit. The DRV high−current capability (−0.5 /+0.8 A) makes it suitable to effec-
tively drive high gate charge power MOSFETs.
10
VCC
This pin is the positive supply of the IC. The circuit starts to operate when VCC exceeds 15 V and turns off
when VCC goes below 9 V (typical values). After start−up, the operating range is 10 V up to 28 V. An OVP
comparator monitors this pin and offers a means to latch the converter in fault conditions.
11 NC
12 NC
13 Removed for creepage distance.
14 HV This pin provides a charging current during start−up and auto−recovery faults but also a means to efficiently
discharge the input X2 capacitors.
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