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NCP1200P40 (ON Semiconductor) : Total 16 Pages

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NCP1200
PWM Current-Mode
Controller for Low-Power
Universal Off-Line Supplies
Housed in SOIC8 or PDIP8 package, the NCP1200 represents a
major leap toward ultracompact Switchmode Power Supplies. Due to
a novel concept, the circuit allows the implementation of a complete
offline battery charger or a standby SMPS with few external
components. Furthermore, an integrated output shortcircuit
protection lets the designer build an extremely lowcost ACDC wall
adapter associated with a simplified feedback scheme.
With an internal structure operating at a fixed 40 kHz, 60 kHz or
100 kHz, the controller drives low gatecharge switching devices like
an IGBT or a MOSFET thus requiring a very small operating power.
Due to currentmode control, the NCP1200 drastically simplifies the
design of reliable and cheap offline converters with extremely low
acoustic generation and inherent pulsebypulse control.
When the current setpoint falls below a given value, e.g. the output
power demand diminishes, the IC automatically enters the skip cycle
mode and provides excellent efficiency at light loads. Because this
occurs at low peak current, no acoustic noise takes place.
Finally, the IC is selfsupplied from the DC rail, eliminating the
need of an auxiliary winding. This feature ensures operation in
presence of low output voltage or shorts.
Features
No Auxiliary Winding Operation
Internal Output ShortCircuit Protection
Extremely Low NoLoad Standby Power
CurrentMode with SkipCycle Capability
Internal Leading Edge Blanking
250 mA Peak Current Source/Sink Capability
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
Direct Optocoupler Connection
Builtin Frequency Jittering for Lower EMI
SPICE Models Available for TRANsient and AC Analysis
Internal Temperature Shutdown
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
ACDC Adapters
Offline Battery Chargers
Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)
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8
1
8
1
SOIC8
D SUFFIX
CASE 751
PDIP8
P SUFFIX
CASE 626
MARKING
DIAGRAMS
8
200Dy
ALYW
G
1
8
1200Pxxx
AWL
YYWWG
1
xxx = Device Code: 40, 60 or 100
y = Device Code:
4 for 40
6 for 60
1 for 100
A = Assembly Location
L = Wafer Lot
Y, YY = Year
W, WW = Work Week
G, G = PbFree Package
PIN CONNECTIONS
Adj 1
FB 2
CS 3
GND 4
8 HV
7 NC
6 VCC
5 Drv
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information on page 14 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
April, 2015 Rev. 19
1
Publication Order Number:
NCP1200/D



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NCP1200
EMI
Filter
Universal Input
C3
10 mF
400 V
+
1 Adj
2 FB
HV 8
NC 7
3 CS VCC 6
4 GND Drv 5
*
D2
1N5819
M1
MTD1N60E
C5
10 mF
+
Rsense
*Please refer to the application information section
Figure 1. Typical Application
6.5 V @ 600 mA
+ C2
470 mF/10 V
Rf
470
D8
5 V1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPIN FUNCTION DESCRIPTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPinNo. PinName
Function
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 Adj Adjust the Skipping Peak Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 FB Sets the Peak Current Setpoint
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 CS CurrentSenseInput
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4
GND
The IC Ground
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 Drv DrivingPulses
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ6 VCC SuppliestheIC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ7 NC NoConnection
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ8 HV GeneratestheVCCfromtheLine
Description
This pin lets you adjust the level at which the cycle skipping process takes
place.
By connecting an Optocoupler to this pin, the peak current setpoint is adjus-
ted accordingly to the output power demand.
This pin senses the primary current and routes it to the internal comparator
via an L.E.B.
The driver’s output to an external MOSFET.
This pin is connected to an external bulk capacitor of typically 10 mF.
This unconnected pin ensures adequate creepage distance.
Connected to the highvoltage rail, this pin injects a constant current into
the VCC bulk capacitor.
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NCP1200
Adj 1
FB 2
Current 3
Sense
75.5 k
1.4 V
Skip Cycle
+ Comparator
-
Internal
VCC
29 k
HV Current
Source
UVLO
High and Low
Internal Regulator
250 ns
L.E.B.
40, 60 or
100 kHz
Clock
Q FlipFlop
Set DCmax = 80% Q
Reset
8 HV
7 NC
6 VCC
Ground 4
8k
+ Vref
- 5.2 V
60 k
20 k
+
-
1V
Overload?
Fault Duration
±250 mA
5 Drv
Figure 2. Internal Circuit Architecture
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMAXIMUM RATINGS
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRating
Symbol
Value
Units
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁThermal Resistance JunctiontoAir, PDIP8 version
Thermal Resistance JunctiontoAir, SOIC version
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁThermal Resistance JunctiontoCase
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMaximum Junction Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTypical Temperature Shutdown
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStorage Temperature Range
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁESD Capability, HBM Model (All Pins except VCC and HV)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁESD Capability, Machine Model
VCC
RqJA
RqJA
RqJC
TJmax
Tstg
16
100
178
57
150
140
60 to +150
2.0
200
V
°C/W
°C
°C
kV
V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMaximum Voltage on Pin 8 (HV), pin 6 (VCC) Grounded
450 V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMaximum Voltage on Pin 8 (HV), Pin 6 (VCC) Decoupled to Ground with 10 mF
500 V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMinimum Operating Voltage on Pin 8 (HV)
30 V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStresses 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 series contains ESD protection rated using the following tests:
Human Body Model (HBM) 2000 V per JEDEC Standard JESD22, Method A114E.
Machine Model (MM) 200 V per JEDEC Standard JESD22, Method A115A.
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NCP1200
ELECTRICAL CHARACTERISTICS (For typical values TJ = +25°C, for min/max values TJ = 25°C to +125°C, Max TJ = 150°C,
VCC= 11 V unless otherwise noted)
Rating
Pin Symbol
Min
Typ
Max Unit
DYNAMIC SELFSUPPLY (All Frequency Versions, Otherwise Noted)
VCC Increasing Level at Which the Current Source Turnsoff
VCC Decreasing Level at Which the Current Source Turnson
VCC Decreasing Level at Which the Latchoff Phase Ends
Internal IC Consumption, No Output Load on Pin 5
6 VCCOFF 10.3
11.4
12.5
V
6 VCCON
8.8
9.8
11
V
6 VCClatch
6.3
V
6 ICC1
710 880 mA
Note 1
Internal IC Consumption, 1 nF Output Load on Pin 5, FSW = 40 kHz
6 ICC2
1.2 1.4 mA
Note 2
Internal IC Consumption, 1 nF Output Load on Pin 5, FSW = 60 kHz
6 ICC2
1.4 1.6 mA
Note 2
Internal IC Consumption, 1 nF Output Load on Pin 5, FSW = 100 kHz
6 ICC2
1.9 2.2 mA
Note 2
Internal IC Consumption, Latchoff Phase
INTERNAL CURRENT SOURCE
6 ICC3
350 mA
Highvoltage Current Source, VCC = 10 V
Highvoltage Current Source, VCC = 0 V
DRIVE OUTPUT
8 IC1
8 IC2
2.8 4.0
4.9
mA
mA
Output Voltage Risetime @ CL = 1 nF, 1090% of Output Signal
Output Voltage Falltime @ CL = 1 nF, 1090% of Output Signal
Source Resistance (drive = 0, Vgate = VCCHMAX 1 V)
Sink Resistance (drive = 11 V, Vgate = 1 V)
CURRENT COMPARATOR (Pin 5 Unloaded)
5 Tr
5 Tf
5 ROH
5 ROL
67 ns
28 ns
27 40 61 W
5 12 25 W
Input Bias Current @ 1 V Input Level on Pin 3
Maximum internal Current Setpoint
Default Internal Current Setpoint for Skip Cycle Operation
Propagation Delay from Current Detection to Gate OFF State
Leading Edge Blanking Duration
INTERNAL OSCILLATOR (VCC = 11 V, Pin 5 Loaded by 1 kW)
Oscillation Frequency, 40 kHz Version
Oscillation Frequency, 60 kHz Version
Oscillation Frequency, 100 kHz Version
Builtin Frequency Jittering, FSW = 40 kHz
Builtin Frequency Jittering, FSW = 60 kHz
Builtin Frequency Jittering, FSW = 100 kHz
Maximum Duty Cycle
3 IIB
3 ILimit
3 ILskip
3 TDEL
3 TLEB
fOSC
fOSC
fOSC
fjitter
fjitter
fjitter
Dmax
0.02 mA
0.8 0.9 1.0 V
350 mV
100 160 ns
230 ns
36 42 48 kHz
52 61 70 kHz
86 103 116 kHz
300 Hz/V
450 Hz/V
620 Hz/V
74 80 87 %
FEEDBACK SECTION (VCC = 11 V, Pin 5 Loaded by 1 kW)
Internal Pullup Resistor
Pin 3 to Current Setpoint Division Ratio
2 Rup
Iratio
8.0 kW
4.0 − −
SKIP CYCLE GENERATION
Default skip mode level
1 Vskip 1.1 1.4 1.6 V
Pin 1 internal output impedance
1 Zout
25 kW
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.
1. Max value @ TJ = 25°C.
2. Max value @ TJ = 25°C, please see characterization curves.
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