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NCP1240 데이터시트 PDF




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기능 Fixed Frequency Current Mode Controller
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NCP1240 데이터시트, 핀배열, 회로
NCP1240
Fixed Frequency Current
Mode Controller for Flyback
Converters
The NCP1240 is a new fixed−frequency current−mode controller
featuring the Dynamic Self−Supply. This function greatly simplifies
the design of the auxiliary supply and the VCC capacitor by activating
the internal startup current source to supply the controller during
start−up, transients, latch, stand−by etc. This device contains a special
HV detector which detect the application unplug from the AC input
line and triggers the X2 discharge current. This HV structure allows
the brown−out detection as well.
It features a timer−based fault detection that ensures the detection of
overload and an adjustable compensation to help keep the maximum
power independent of the input voltage.
Due to frequency foldback, the controller exhibits excellent
efficiency in light load condition while still achieving very low
standby power consumption. Internal frequency jittering, ramp
compensation, and a versatile latch input make this controller an
excellent candidate for the robust power supply designs.
A dedicated Off mode allows to reach the extremely low no load
input power consumption via “sleeping” whole device and thus
minimize the power consumption of the control circuitry.
www.onsemi.com
MARKING
DIAGRAM
SOIC−7
CASE 751U
8
40Xfff
ALYWX
G
1
40Xfff = Specific Device Code
X = A, B, E or F
fff = 065 or 100
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
Features
Fixed−Frequency Current−Mode Operation (65 kHz and 100 kHz
frequency options)
Frequency Foldback then Skip Mode for Maximized Performance in
Light Load and Standby Conditions
Latch 1
FB 2
CS 3
GND 4
8 HV
6 VCC
5 DRV
Timer−Based Overload Protection with Latched (Options A and E) or
(Top View)
Auto−Recovery (Options B and F) Operation
High−voltage Current Source with Brown−Out Detection and
Dynamic Self−Supply, Simplifying the Design of the VCC Circuitry
Frequency Modulation for Softened EMI Signature
ORDERING INFORMATION
See detailed ordering and shipping information on page 44 of
this data sheet.
Adjustable Overpower Protection Dependant on the Bulk Voltage
Latch−off Input Combined with the Overpower Protection Sensing
Input
VCC Operation up to 28 V, With Overvoltage Detection
500/800 mA Source/Sink Drive Peak Current
Capability
10 ms Soft−Start
Internal Thermal Shutdown
No−Load Standby Power < 30 mW
X2 Capacitor in EMI Filter Discharging Feature
Typical Applications
AC−DC Adapters for Notebooks, LCD, and Printers
Offline Battery Chargers
Consumer Electronic Power Supplies
Auxiliary/Housekeeping Power Supplies
Offline Adapters for Notebooks
These Devices are Pb−Free and Halogen Free/BFR Free
© Semiconductor Components Industries, LLC, 2015
July, 2015 − Rev. 1
1
Publication Order Number:
NCP1240/D




NCP1240 pdf, 반도체, 판매, 대치품
NCP1240
MAXIMUM RATINGS
Rating
DRV
(pin 5)
Symbol
Maximum voltage on DRV pin
(Dc−Current self−limited if operated within the allowed range) (Note 1)
Value
–0.3 to 20
±1000 (peak)
Unit
V
mA
VCC
(pin 6)
HV
(pin 8)
VCCPower Supply voltage, VCC pin, continuous voltage
Power Supply voltage, VCC pin, continuous voltage (Note 1)
Maximum voltage on HV pin
(Dc−Current self−limited if operated within the allowed range)
–0.3 to 28
±30 (peak)
–0.3 to 500
±20
V
mA
V
mA
Vmax
Maximum voltage on low power pins (except pin 5, pin 6 and pin 8)
(Dc−Current self−limited if operated within the allowed range) (Note 1)
–0.3 to 10
±10 (peak)
V
mA
RqJ−A
Thermal Resistance SOIC−7
Junction-to-Air, low conductivity PCB (Note 2)
Junction-to-Air, medium conductivity PCB (Note 3)
Junction-to-Air, high conductivity PCB (Note 4)
°C/W
162
147
115
RqJ−C Thermal Resistance Junction−to−Case
TJMAX Operating Junction Temperature
TSTRGMAX Storage Temperature Range
ESD Capability, HBM model (All pins except HV) per JEDEC Standard JESD22,
Method A114E
73
−40 to +150
−60 to +150
> 2000
°C/W
°C
°C
V
ESD Capability, Machine Model per JEDEC Standard JESD22, Method A115A
> 200
V
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. This device contains latch-up protection and exceeds 100 mA per JEDEC Standard JESD78.
2. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 50 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-1 conductivity test PCB. Test conditions were under natural convection or zero air flow.
3. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 100 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-2 conductivity test PCB. Test conditions were under natural convection or zero air flow.
4. As mounted on a 80 x 100 x 1.5 mm FR4 substrate with a single layer of 650 mm2 of 2 oz copper traces and heat spreading area. As specified
for a JEDEC 51-3 conductivity test PCB. Test conditions were under natural convection or zero air flow.
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VHV = 125 V,
VCC = 11 V unless otherwise noted)
Characteristics
Test Condition
Symbol
Min Typ Max
HIGH VOLTAGE CURRENT SOURCE
Minimum Voltage for Current Source
Operation
VHV(min) − 30 40
Current Flowing Out of VCC Pin
(X2 discharge current value is equal to Istart2)
Off−state Leakage Current
Off−mode HV Supply Current
SUPPLY
VCC = 0 V
VCC = VCC(on) − 0.5 V
VHV = 500 V, VCC = 15 V
VHV = 141 V,
VHV = 325 V,
VCC loaded by 4.7 mF cap
Istart1
Istart2
Istart(off)
IHV(off)
0.2 0.5 0.8
5 8 11
10 25 50
− 45 60
− 50 70
HV Current Source Regulation Threshold
Turn−on Threshold Level, VCC Going Up
HV Current Source Stop Threshold
VCC(reg)
VCC(on)
8 11 −
11.0 12.0 13.0
HV Current Source Restart Threshold
VCC(min) 7.8 8.4 9.0
Turn−off Threshold (Note 5)
VCC(off)
8.8 9.3 9.8
Overvoltage Threshold
VCC(ovp)
25 26.5 28
5. VCC(off) < VCC(min) with the minimum gap 0.5 V.
6. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only).
7. Guaranteed by design.
8. CS pin source current is a sum of Ibias and IOPC, thus at VHV = 125 V is observed the Ibias only, because IOPC is switched off.
Unit
V
mA
mA
mA
V
V
V
V
V
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NCP1240 전자부품, 판매, 대치품
NCP1240
ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VHV = 125 V,
VCC = 11 V unless otherwise noted)
Characteristics
Test Condition
Symbol
Min Typ Max
Unit
REMOTE CONTROL ON FB PIN
Go To Off Mode Timer
OVERLOAD PROTECTION
VCC > VCC(off)
tGTOM
400 500 600 ms
Fault Timer Duration
(NCP1240A/B)
(NCP1240E/F)
tfault 44 64 84 ms
9.1 14 23.2
Autorecovery Mode Latch−off Time Duration
CS Threshold for Transient Peak Timer
Activation
tautorec
VCS(tran)
0.85 1.00 1.35
0.46 0.49 0.52
s
V
Transient Peak Power Timer Duration
VCS(peak) = VCS(tran) + 0.1 V from 1st
(NCP1240A/B) time VCS > VCS(tran) to DRV stop
(NCP1240E/F)
ttran
4.1 6.1 8.1 s
44 64 84 ms
OVERPOWER PROTECTION
VHV to IOPC Conversion Ratio
Current Flowing out of CS Pin (Note 8)
FB Voltage Above which IOPC is Applied
FB Voltage Below which is No IOPC Applied
LATCH−OFF INPUT
VHV = 125 V
VHV = 162 V
VHV = 325 V
VHV = 365 V
VHV = 365 V
VHV = 365 V
KOPC
− 0.54 − mA / V
IOPC(125)
0
mA
IOPC(162) − 20 −
IOPC(325) − 110 −
IOPC(365) 105 130 150
VFB(OPCF)
2.6
V
VFB(OPCE)
2.1
V
High Threshold
Low Threshold
OTP Resistance Threshold
(TJ = 25°C)
(TJ = 80°C)
(TJ = 110°C)
VLatch going up
VLatch going down
External NTC resistance
is going down
VOVP
VOTP
ROTP
2.35 2.5 2.65 V
− 0.4 − V
6.6 7.7 8.6 kW
− 8.5 −
− 9.5 −
Current Source for Direct NTC Connection
During Sormal Operation
During Soft−start
Blanking Duration On High Latch Detection
VLatch = 0 V
65 kHz version
100 kHz version
INTC
INTC(SSTART)
tLatch(OVP)
20
60
35
20
mA
50 70
100 140
50 70 ms
35 55
Blanking Duration On Low Latch Detection
Clamping voltage
TEMPERATURE SHUTDOWN
ILatch = 0 mA
ILatch = 1 mA
tLatch(OTP) − 350 − ms
Vclamp0(Latch)
1.0
1.2
1.4
V
Vclamp1(Latch)
1.8
2.4
3.0
Temperature shutdown
TJ going up
TTSD
− 150 − °C
Temperature shutdown hysteresis
TJ going down
TTSD(HYS)
30
°C
5. VCC(off) < VCC(min) with the minimum gap 0.5 V.
6. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only).
7. Guaranteed by design.
8. CS pin source current is a sum of Ibias and IOPC, thus at VHV = 125 V is observed the Ibias only, because IOPC is switched off.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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