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PDF NCP1562B Data sheet ( Hoja de datos )
| Número de pieza | NCP1562B | |
| Descripción | High Performance Active Clamp/Reset PWM Controller | |
| Fabricantes | ON Semiconductor | |
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NCP1562A, NCP1562B
High Performance Active
Clamp/Reset PWM Controller
The NCP1562x is a family of voltage mode controllers designed
for dc−dc converters requiring high−efficiency and low parts count.
These controllers incorporate two in phase outputs with an overlap
delay to prevent simultaneous conduction and facilitates soft
switching. The main output is designed for driving a forward
converter primary MOSFET. The secondary output is designed for
driving an active clamp circuit MOSFET, a synchronous rectifier on
the secondary side, or an asymmetric half bridge circuit.
The NCP1562 family reduces component count and system size by
incorporating high accuracy on critical specifications such as
maximum duty cycle limit, undervoltage detector and overcurrent
threshold. Two distinctive features of the NCP1562 are soft−stop and
a cycle skip current limit with a time threshold. Soft−stop circuitry
powers down the converter in a controlled manner if a severe fault is
detected. The cycle skip detector enables a soft−stop sequence if a
continuous overcurrent condition is present.
Additional features found in the NCP1562 include line feed−
forward, frequency synchronization up to 1.0 MHz, cycle−by−cycle
current limit with leading edge blanking (LEB), independent under
and overvoltage detectors, adjustable output overlap delay,
programmable maximum duty cycle, internal startup circuit and
soft−start.
Features
• Dual Control Outputs with Adjustable Overlap Delay
• >2.0 A Output Drive Capability
• Soft−Stop Powers Down Converter in a Controlled Manner
• Cycle−by−Cycle Current Limit
• Cycle Skip Initiated if Continuous Current Limit Condition Exists
• Voltage Mode Operation with Input Voltage Feedforward
• Fixed Frequency Operation up to 1.0 MHz
• Bidirectional Frequency Synchronization
• Independent Line Undervoltage and Overvoltage Detectors
• Accurate Programmable Maximum Duty Cycle Limit
• Programmable Maximum Volt−Second Product
• Programmable Soft−Start
• Internal 100 V Startup Circuit
• Precision 5.0 V Reference
• These are Pb−Free Devices*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAMS
TSSOP−16
NCP
16
DT SUFFIX
562x
CASE 948F
ALYW
1
SO−16
D SUFFIX
CASE 751B
NCP1562xG
AWLYWW
x = Current Limit (A, B)
A = Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 24 of this data sheet.
Typical Applications
• Telecommunications Power Converters
• Low Output Voltage Converters using
Control Driven Synchronous Rectifier
• Industrial Power Converters
• 42 V Automotive System
• ATX Power Supplies
© Semiconductor Components Industries, LLC, 2006
November, 2006 − Rev. 0
1
Publication Order Number:
NCP1562A/D
1 page  
NCP1562A, NCP1562B
MAXIMUM RATINGS (Notes 1 and 2)
Rating
Line Voltage
Auxiliary Supply, OUT1, OUT2
All Other Inputs/Outputs Voltage
All Other Inputs/Outputs Current
5.0 V Reference Output Current
5.0 V Reference Output Voltage
OUT1 Peak Output Current (D = 2%)
OUT2 Peak Output Current (D = 2%)
Operating Junction Temperature
Storage Temperature Range
Power Dissipation (TA = 25_C, 2.0 Oz Cu, 1.0 Sq Inch Printed Circuit Copper Clad)
DT Suffix, Plastic Package Case 948F (TSSOP−16)
D Suffix, Plastic Package Case 751B (SO−16)
Symbol
Vin
VAUX, Voutx
VIO
IIO
IREF
VREF
Iout1
Iout2
TJ
Tstg
PD
Value
100
20
10
5.0
10
−0.3 to 6.0
2.5
1.0
–40 to +125
–55 to +150
0.75
0.95
Unit
V
V
V
mA
mA
V
A
A
_C
_C
W
Thermal Resistance, Junction to Ambient (2.0 Oz Cu Printed Circuit Copper Clad)
DT Suffix, Plastic Package Case 948F (TSSOP−16)
0.36 Sq In
1.0 Sq In
D Suffix, Plastic Package Case 751B (SO−16)
0.36 Sq In
1.0 Sq In
RqJA
_C/W
155
133
120
105
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Pins 2−16:
Human Body Model 2000 V per MIL–STD–883, Method 3015.
Machine Model Method 160 V.
Pin 1 is the HV startup of the device and is rated to the max rating of the part, or 100 V.
2. This device contains Latchup protection and exceeds "100 mA per JEDEC Standard JESD78.
http://onsemi.com
5
5 Page 
NCP1562A, NCP1562B
250
225
200 FF−Offset
175
150
125 SS Reset
100
75
50
25
0
−50 −25
0
25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 13. FF Offset and SS Reset Voltages
vs. Junction Temperature
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
−50
−25 0
25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 14. Feedforward Peak Voltage
vs. Junction Temperature
150
550
500 NCP1562B
450
400
350
300
250
200
150
−50
NCP1562A
−25 0
25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 15. Current Limit Threshold Voltage
vs. Junction Temperature
150
140
130
120
110
100
90
80
70
60
50
−50 −25
0
25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 16. Current Limit Propagation Delay
vs. Junction Temperature
100
90
80
70
60
50
40
30
20
10
0
−50
−25 0 25 50 75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 17. Leading Edge Blanking Time
vs. Junction Temperature
150
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| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet NCP1562B.PDF ] | |
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