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 6
th
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
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, H, I or J
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
G
= Pb−Free Package
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
High−voltage Current Source for Lossless Start−up Sequence
X2 Capacitors Discharge Capability
Power Savings Mode (PSM) for Extremely Low No−Load Power:
Wide V
CC
Range from 10 V to 28 V
Latching−off 28−V V
CC
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, H, I and J versions
Ready for High−Density QR design (F, G, H, I and J versions)
These Devices are Pb−Free and are RoHS Compliant
PIN CONNECTIONS
X2
REM
OPP
ZCD
Fault
FB
CS
HV
NC
NC
VCC
DRV
GND
(For C, D, E, F, G, and H versions)
X2
REM
OPP
ZCD
Fault
FB
CS
HV
NC
IFF
VCC
DRV
GND
(For I and J versions)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 31 of this data sheet.
©
Semiconductor Components Industries, LLC, 2017
1
February, 2017 − Rev. 6
Publication Order Number:
NCP1339/D
NCP1339
Vout
Vaux
GND
NCP1339
PSM_OFF
14
13
12
11
10
X2
REM
N
EMI
Filter
L1
FB
1
2
3
4
5
6
7
IFF
Vcc
9
GND
8
CS
Rsense
Figure 2. NCP1339 Typical Application Circuit (with IFF pin)
PIN FUNCTION DESCRIPTION
Pin
Number
1
2
3
4
5
6
7
8
9
10
Pin
Name
X2
REM
OPP
ZCD
Fault
FB
CS
GND
DRV
VCC
Function
When the voltage on this pin disappears, the controller ensures the X2−capacitors discharge.
The part operates when the REM pin is forced lower than a certain level and enters the Power Savings
Mode (PSM) otherwise.
A resistive divider from the auxiliary winding to this pin sets the OPP compensation level.
Input to the demagnetization detection comparator for the QR Flyback controller.
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.
Feedback input for the QR Flyback controller. Allows direct connection to an optocoupler.
Input to the cycle−by−cycle current limit comparator for the QR Flyback section.
Ground reference.
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.
This pin is the positive supply of the IC. The circuit starts to operate when
V
CC
exceeds 15 V and turns off
when
V
CC
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.
The external resistor connected to this pin adjusts the frozen peak current during frequency foldback mode
and the power gap between different valley lockouts.
11
12
13
14
NC or IFF
NC
Removed for creepage distance.
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.
www.onsemi.com
3
NCP1339
MAXIMUM RATINGS
Rating
High Voltage Startup Circuit Input Voltage
High Voltage Startup Circuit Input Current
Supply Input Voltage
Supply Input Current
Supply Input Voltage Slew Rate
Fault and IFF Input Voltage
Fault and IFF Input Current
REM and X2 Input Voltage
REM and X2 Input Current
Zero Current Detection and OPP Input Voltage
Zero Current Detection and OPP Input Current
Current Sense Input Voltage
Current Sense Input Current
Feedback Input Voltage
Feedback Input Current
Driver Maximum Voltage (Note 1)
Driver Maximum Current
Operating Junction Temperature
Maxim Junction Temperature
Storage Temperature Range
Thermal Resistance, Junction to Ambient 2 Oz Cu Printed Circuit Copper Clad With a
100 mm
2
copper heat spreader area
ESD Capability
Human Body Model per JEDEC Standard JESD22−A114F (All pins except HV)
Human Body Model per JEDEC Standard JESD22−A114F (HV Pin)
Machine Model per JEDEC Standard JESD22−A115C
Charge Device Model per JEDEC Standard JESD22−C101E
Latch−Up Protection per JEDEC Standard JESD78
Symbol
V
HV
I
HV
V
CC(MAX)
I
CC(MAX)
dV
CC
/dt
V
i1
I
i1
V
i2
I
i2
V
ZCD
I
ZCD
V
CS
I
CS
V
FB
I
FB
V
DRV
I
DRV(SRC)
I
DRV(SNK)
T
J
T
J(MAX)
T
STG
R
θJA
Value
−0.3 to 500
20
−0.3 to 30
30
1
−0.3 to (V
CC
+ 1)
10
−0.3 to 10
10
−0.3 to (V
CC
+ 1)
−2/+5
−0.3 to 5
10
−0.3 to 9
10
−0.3 to V
DRV(high)
500
800
−40 to 125
150
–60 to 150
132
Unit
V
mA
V
mA
V/ms
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
°C
°C
°C
°C/W
2000
1000
200
500
±100
V
V
V
V
mA
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Maximum driver voltage is limited by the driver clamp voltage, V
DRV(high)
, when V
CC
exceeds the driver clamp voltage. Otherwise, the
maximum driver voltage is V
CC
.
www.onsemi.com
5
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
