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PDF NCP1031 Data sheet ( Hoja de datos )
| Número de pieza | NCP1031 | |
| Descripción | Low Power PWM Controller | |
| Fabricantes | ON | |
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NCP1030, NCP1031
Low Power PWM Controller
with On-Chip Power Switch
and Startup Circuits for
48 V Telecom Systems
The NCP1030 and NCP1031 are a family of miniature high−voltage
monolithic switching regulators with on−chip Power Switch and Startup
Circuits. The NCP103x family incorporates in a single IC all the active
power, control logic and protection circuitry required to implement, with
minimal external components, several switching regulator applications,
such as a secondary side bias supply or a low power dc−dc converter.
This controller family is ideally suited for 48 V telecom, 42 V automotive
and 12 V input applications. The NCP103x can be configured in any
single−ended topology such as forward or flyback. The NCP1030 is
targeted for applications requiring up to 3 W, and the NCP1031 is
targeted for applications requiring up to 6 W.
The internal error amplifier allows the NCP103x family to be easily
configured for secondary or primary side regulation operation in
isolated and non−isolated configurations. The fixed frequency oscillator
is optimized for operation up to 1 MHz and is capable of external
frequency synchronization, providing additional design flexibility. In
addition, the NCP103x incorporates individual line undervoltage and
overvoltage detectors, cycle by cycle current limit and thermal
shutdown to protect the controller under fault conditions. The preset
current limit thresholds eliminate the need for external sensing
components.
Features
• On Chip High 200 V Power Switch Circuit and Startup Circuit
• Internal Startup Regulator with Auxiliary Winding Override
• Operation up to 1 MHz
• External Frequency Synchronization Capability
• Frequency Fold−down Under Fault Conditions
• Trimmed ±2% Internal Reference
• Line Undervoltage and Overvoltage Detectors
• Cycle by Cycle Current Limit Using SENSEFET®
• Active LEB Circuit
• Overtemperature Protection
• Internal Error Amplifier
• Pb−Free Packages are Available
Typical Applications
• POE (Power Over Ethernet)/PD. Refer to Application Note AND8247.
• Secondary Side Bias Supply for Isolated dc−dc Converters
• Stand Alone Low Power dc−dc Converter
• Low Power Bias Supply
• Low Power Boost Converter
8
1
8
1
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Micro8t
DM SUFFIX
CASE 846A
SO−8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
8
1030
AYWG
G
1
8
N1031
ALYW
G
1
DFN−8
NCP
MN SUFFIX
1031
1
CASE 488AF
ALYW G
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
GND
CT
VFB
COMP
1
2
3
4
8
VDRAIN
7
VCC
6
UV
5
OV
(Top View)
Ç ÇÇGND
Ç ÇÇCT
Ç ÇÇVFB
ÇÇ ÇÇÇÇCOMP
EP Flag
VDRAIN
VCC
UV
OV
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 19 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
September, 2014 − Rev. 11
1
Publication Order Number:
NCP1030/D
1 page  
NCP1030, NCP1031
DC ELECTRICAL CHARACTERISTICS (VDRAIN = 48 V, VCC = 12 V, CT = 560 pF, VUV = 3 V, VOV = 2 V, VFB = 2.3 V,
VCOMP = 2.5 V, TJ = −40°C to 125°C, typical values shown are for TJ = 25°C unless otherwise noted.) (Note 1)
Characteristics
Symbol
Min Typ
Max Unit
STARTUP CONTROL
Startup Circuit Output Current (VFB = VCOMP)
NCP1030
TJ = 25°C
VCC = 0 V
VCC = VCC(on) − 0.2 V
TJ = −40°C to 125°C
VCC = 0 V
VCC = VCC(on) − 0.2 V
NCP1031
TJ = 25°C
VCC = 0 V
VCC = VCC(on) − 0.2 V
TJ = −40°C to 125°C
VCC = 0 V
VCC = VCC(on) − 0.2 V
ISTART
mA
10 12.5
6.0 8.6
8.0 −
2.0 −
15
12
16
13
13 16
8.0 12
11 −
4.0 −
19
16
21
18
VCC Supply Monitor (VFB = 2.7 V)
Startup Threshold Voltage (VCC Increasing)
Minimum Operating VCC After Turn−on (VCC Increasing)
Hysteresis Voltage
Undervoltage Lockout Threshold Voltage, VCC Decreasing (VFB = VCOMP)
Minimum Startup Voltage (Pin 8)
ISTART = 0.5 mA, VCC =VCC(on) − 0.2 V
VCC(on)
VCC(off)
VCC(hys)
9.6 10.2
7.0 7.6
− 2.6
VCC(reset)
6.0 6.6
VSTART(min)
− 16.8
10.6
8.0
−
7.0
18.5
V
V
V
ERROR AMPLIFIER
Reference Voltage (VCOMP = VFB, Follower Mode)
TJ = 25°C
TJ = −40°C to 125°C
Line Regulation (VCC = 8 V to 16 V, TJ = 25°C)
Input Bias Current (VFB = 2.3 V)
COMP Source Current
COMP Sink Current (VFB = 2.7 V)
COMP Maximum Voltage (ISRC = 0 mA)
COMP Minimum Voltage (ISNK = 0 mA, VFB = 2.7 V)
Open Loop Voltage Gain
Gain Bandwidth Product
VREF
REGLINE
IVFB
ISRC
ISNK
VC(max)
VC(min)
AVOL
GBW
2.45 2.5
2.40 2.5
− 1.0
− 0.1
80 110
200 550
4.5 −
−−
− 80
− 1.0
V
2.55
2.60
5.0 mV
1.0 mA
140 mA
900 mA
−V
1.0 V
− dB
− MHz
LINE UNDER/OVERVOLTAGE DETECTOR
Undervoltage Lockout (VFB = VCOMP)
Voltage Threshold (Vin Increasing)
Voltage Hysteresis
Input Bias Current
VUV
VUV(hys)
IUV
2.400
0.075
−
2.550
0.175
0
2.700
0.275
1.0
V
V
mA
Overvoltage Lockout (VFB = VCOMP)
Voltage Threshold (Vin Increasing)
Voltage Hysteresis
Input Bias Current
VOV
VOV(hys)
IOV
2.400
0.075
−
2.550
0.175
0
2.700
0.275
1.0
V
V
mA
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. Production testing for NCP1030DMR2 is performed at 25°C only; limits at −40°C and 125°C are guaranteed by design.
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5
5 Page 
NCP1030, NCP1031
TYPICAL CHARACTERISTICS
4.1
VDRAIN = 48 V
3.9 TJ = 25°C
CT = 560 pF
3.7
3.5
3.3
3.1
2.9
2.7
2.5
10
11 12 13 14
VCC, SUPPLY VOLTAGE (V)
15
Figure 28. Operating Supply Current vs.
Supply Voltage
16
4.0
3.5
VCC = 12 V
CT = 560 pF
3.0
2.5 VUV = 3.0 V, VFB = 2.3 V
2.0
1.5
VUV = 3.0 V, VFB = 2.7 V
1.0
0.5
0
−50
VUV = 2.0 V
−25 0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
150
Figure 29. Supply Current vs. Junction
Temperature
10
TJ = 25 °C
9
8
7
6
5 NCP1031
4
3 NCP1030
2
200 300 400 500 600 700 800 900 1000
fOSC, OSCILLATOR FREQUENCY (kHz)
Figure 30. Operating Supply Current vs.
Oscillator Frequency
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11
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| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet NCP1031.PDF ] | |
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