NCP1070, NCP1071,
NCP1072, NCP1075,
NCP1076, NCP1077
High-Voltage Switcher for
Low Power Offline SMPS
The NCP107x products integrate a fixed frequency current mode
controller with a 700 V MOSFET. Available in a PDIP−7 or SOT−223
package, the NCP107x offer a high level of integration, including
soft−start, frequency−jittering, short−circuit protection, skip−cycle, a
maximum peak current set point, ramp compensation, and a Dynamic
Self−Supply (eliminating the need for an auxiliary winding).
Unlike other monolithic solutions, the NCP107x is quiet by nature:
during nominal load operation, the part switches at one of the available
frequencies (65, 100 or 130 kHz). When the output power demand
diminishes, the IC automatically enters frequency foldback mode and
provides excellent efficiency at light loads. When the power demand
reduces further, it enters into a skip mode to reduce the standby
consumption down to a no load condition.
Protection features include: a timer to detect an overload or a
short−circuit event, Overvoltage Protection with auto−recovery and
AC input line voltage detection.
For improved standby performance, the connection of an auxiliary
winding stops the DSS operation and helps to reduce input power
consumption below 50 mW at high line.
Features
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MARKING
DIAGRAMS
SOT−223
ST SUFFIX
CASE 318E
1
AYW
z07xyG
G
PDIP−7
P SUFFIX
CASE 626A
P107xfyyy
AWL
YYWWG
•
Built−in 700 V MOSFET with R
DS(on)
of 4.7
W
(NCP1076/77) /
•
•
•
•
•
•
•
•
•
•
11
W
(NCP1072/75) / 22
W
(NCP1070/71)
Large Creepage Distance Between High−voltage Pins
Current−Mode Fixed Frequency Operation – 65 / 100 / 130 kHz
Peak Current: NCP1070/72 with 250 mA, NCP1071 with 350 mA,
NCP1075 with 450 mA, NCP1076 with 650 mA and NCP1077 with
ORDERING INFORMATION
800 mA
See detailed ordering and shipping information on page 28 of
this data sheet.
Fixed Ramp Compensation
Skip−Cycle Operation at Low Peak Currents Only: No Acoustic
Noise!
Dynamic Self−Supply: No Need for an Auxiliary
•
No Load Input Consumption < 50 mW
Winding
•
Frequency Foldback to Improve Efficiency at Light
Internal 1 ms Soft−Start
Load
Auto−Recovery Output Short Circuit Protection with
•
Internal Temperature Shutdown
Timer−Based Detection
•
These are Pb−Free Devices
Auto−Recovery Overvoltage Protection with Auxiliary
Typical Applications
Winding Operation
•
Auxiliary / Standby Isolated Power Supplies White
Frequency Jittering for Better EMI Signature, Including
Goods / Smart Meter / E−Meter
Frequency Foldback Mode
= 1 for Std product; V for Automotive
= Current Limit (0, 1, 2, 5, 6 or 7)
= Oscillator Frequency
=
A (65 kHz), B (100 kHz), C (130 kHz)
yyy
= 065, 100, 130
f
= OFF phase in fault mode
=
P (420 ms), B (210 ms)
A
= Assembly Location
WL
= Wafer Lot
Y, YY
= Year
W, WW = Work Week
G or
G
= Pb−Free Package
Z
x
y
©
Semiconductor Components Industries, LLC, 2016
1
March, 2018 − Rev. 9
Publication Order Number:
NCP1070/D
NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
PIN CONNECTIONS
V
CC
1
2
8
7
GND
GND
V
CC
1
FB
GND
FB
3
4
(Top View)
PDIP−7
DRAIN
5
DRAIN
2
4
GND
3
(Top View)
SOT−223
Figure 1. Pin Connections
INDICATIVE MAXIMUM OUTPUT POWER
R
DS(on)
− I
IPK
NCP1070 / 1071
NCP1072 / 1075
NCP1076 / 1077
NOTE:
22
W
− 350 mA
11
W
− 450 mA
4.7
W
− 800 mA
230 Vac
14 W
19 W
25 W
85−265 Vac
7.75 W
10 W
15 W
Informative values only, with T
amb
= 50°C, F
SW
= 65 kHz, Self supply via Auxiliary winding and circuit mounted on minimum
copper area as recommended.
QUICK SELECTION TABLE
NCP1070
R
DS(on)
(W)
Ipeak (mA)
Freq (kHz)
65
250
100
130
65
22
350
100
130
65
250
100
130*
65
NCP1071
NCP1072
11
450
100
130
65
650
100
130
65
NCP1075
NCP1076
4.7
800
100
130
NCP1077
*130 kHz on demand only
Figure 2. Typical Application Example
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2
NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
PIN FUNCTION DESCRIPTION
Pin N5
1
2
3
4
5
6
7
8
GND
GND
Vcc
V
clamp
I
Vcc OVP
Vcc
Management
S
80−us
filter
Ipflag
Q
SCP
Q
R
OFF UVLO
UVLO
Reset
Vdd
Pin Name
V
CC
NC
GND
FB
Drain
Function
Powers the internal circuitry
Pin Description
This pin is connected to an external capacitor. The V
CC
includes an
active shunt which serves as an auto−recovery over voltage protection.
The IC Ground
Feedback signal input
Drain connection
By connecting an opto−coupler to this pin, the peak current set point is
adjusted accordingly to the output power demand.
The internal drain MOSFET connection
This un−connected pin ensures adequate creepage distance
The IC Ground
The IC Ground
Drain
OVP
Jittering
OSC
Sawtooth
S
Q
Foldback
R
I
FBskip
V
FB(REF)
SKIP = ”1” −−> shut
down some blocks to
reduce consumption
R
FB(up)
I
FB
FB
I
freeze
Ipflag
FBfault
Figure 3. Simplified Internal Circuit Architecture
+
I
−
+
−
+
−
t
SCP
t
recovery
LineOK
TSD
UVLO
OFF
DRV
Vcc
line
detection
LineOK
Sawtooth
Q
SKIP
Ramp
compensation
DRV
200 ns
LEB
+
−
GND
to CS setpoint
Reset
+
−
Ipk(0)
Soft
Start
Reset SS as recovering from
SCP, TSD, Vcc OVP, or UVLO
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NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
MAXIMUM RATINGS TABLE
Symbol
V
CC
BVdss
I
DS(PK)
Rating
Power Supply Voltage on all pins, except Pin 5(Drain)
Drain voltage
Drain current peak during transformer saturation (T
J
= 150°C, Note 3):
NCP1070/71:
NCP1072/75:
NCP1076/77:
Drain current peak during transformer saturation (T
J
= 25°C, Note 3):
NCP1070/71:
NCP1072/75:
NCP1076/77:
I_V
CC
R
qJ−A
Maximum Current into Pin 1 when Activating the 8.2 V Active Clamp
P Suffix, Case 626A
Junction−to−Air, 2.0 oz Printed Circuit Copper Clad
R
qJ−A
ST Suffix, Plastic Package Case 318E
Junction−to−Air, 2.0 oz Printed Circuit Copper Clad
TJ
MAX
Maximum Junction Temperature
Storage Temperature Range
ESD Capability, Human Body Model (All pins except HV)
ESD Capability, Machine Model
ESD Capability, Charged Device Model
0.36 Sq. Inch
1.0 Sq. Inch
0.36 Sq. Inch
1.0 Sq. Inch
Value
−0.3 to 10
−0.3 to 700
480
870
2200
850
1500
3900
15
77
60
74
55
150
−60 to +150
2
200
1
°C
°C
kV
V
kV
°C/W
Unit
V
V
mA
mA
mA
mA
mA
mA
mA
°C/W
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 series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per JEDEC JESD22−A114−F
Machine Model Method 200 V per JEDEC JESD22−A115−A
Charged Device Model 1000 V per JEDEC JESD22−C101E
2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78
3. Maximum drain current I
DS(PK)
is obtained when the transformer saturates. It should not be mixed with short pulses that can be seen at turn
on. Figure 4 below provides spike limits the device can tolerate.
Figure 4. Spike Limits
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NCP1070, NCP1071, NCP1072, NCP1075, NCP1076, NCP1077
ELECTRICAL CHARACTERISTICS
(For all NCP107X products except NCP1072P100BG: For typical values T
J
= 25°C, for min/max values T
J
= −40°C to +125°C, V
CC
= 8 V
unless otherwise noted)
(For NCP1072P100BG: For typical values T
J
= 25°C, for min/max values T
J
= −55°C (Note 7) to +125°C, V
CC
= 8 V unless otherwise noted)
Symbol
Rating
Pin
Min
Typ
Max
Unit
SUPPLY SECTION AND V
CC
MANAGEMENT
V
CC(on)
V
CC
increasing level at which the switcher starts operation
NCP1070/71/72/75
NCP1076/77
V
CC
decreasing level at which the HV current source restarts
V
CC
decreasing level at which the switcher stops operation (UVLO)
V
CC
voltage at which the internal latch is reset (guaranteed by design)
Offset voltage above V
CC(on)
at which the internal clamp activates
NCP1070/71
NCP1072/75
NCP1076/77
Internal IC consumption, Mosfet switching
NCP1070/71/72/75
NCP1076/77
Internal IC consumption, FB is 0 V (No switching on MOSFET)
V
1
1
1
1
1
1
1
1
1
1
1
110
130
130
−
−
7.8
7.7
6.5
6.1
8.2
8.1
6.8
6.3
4
170
190
190
0.7
1.0
360
300
300
300
mA
1.0
1.3
mA
W
−
−
−
−
−
−
5
700
22
38
11
19
4.7
8.7
32
55
16
24
6.9
10.75
V
mA
5
5
5
85
ns
20
10
8.6
8.5
7.2
6.6
V
V
V
mV
V
CC(min)
V
CC(off)
V
CC(reset)
V
CC(clamp)
I
CC1
I
CCskip
POWER SWITCH CIRCUIT
R
DS(on)
Power Switch Circuit on−state resistance (Id = 50 mA)
NCP1070/71
T
J
= 25°C
T
J
= 125°C
NCP1072/75
T
J
= 25°C
T
J
= 125°C
NCP1076/77
T
J
= 25°C
T
J
= 125°C
Power Switch Circuit & Startup breakdown voltage
(ID
(off)
= 120
mA,
T
J
= 25°C)
Power Switch & Startup breakdown voltage off−state leakage current
T
J
= 125°C (Vds = 700 V)
Switching characteristics (R
L
=50
W,
V
DS
set for I
drain
= 0.7 x Ilim)
Turn−on time (90% − 10%)
Turn−off time (10% − 90%)
5
BV
DSS
I
DSS(off)
t
on
t
off
INTERNAL START−UP CURRENT SOURCE
I
start1
High−voltage current source, V
=
V
CC(on)
− 200 mV
NCP1070/71/76/77
NCP1072/75
High−voltage current source, V
CC
= 0 V
VCC Transient level for Istart1 to Istart2 toggling point
mA
5
5
5
1
−
5.2
5
9.2
9
0.5
2.2
−
12.2
12
mA
V
I
start2
V
CCTH
CURRENT COMPARATOR
I
IPK
Maximum internal current setpoint at 50% duty cycle
FB pin open, Tj = 25°C
NCP1070
NCP1071
NCP1072
NCP1075
NCP1076
NCP1077
mA
−
−
−
−
−
−
250
350
250
450
650
800
−
−
−
−
−
−
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.
4. The final switch current is: I
IPK(0)
/ (V
in
/L
P
+ S
a
) x V
in
/L
P
+ V
in
/L
P
x t
prop
, with S
a
the built−in slope compensation, Vin the input voltage, L
P
the primary inductor in a flyback, and t
prop
the propagation delay.
5. NCP1072 130 kHz on demand only.
6. Oscillator frequency is measured with disabled jittering.
7. For coldest temperature, QA sampling at −40°C in production and −55°C specification is Guaranteed by Characterization.
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