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PDF ( 数据手册 , 数据表 ) DAP018D

零件编号 DAP018D
描述 PWM Current-Mode Controller
制造商 ON Semiconductor
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DAP018D 数据手册, 描述, 功能
Customer Specific Device from ON Semiconductor
DAP018A/B/C/D/F
PWM Current-Mode
Controller for High-Power
Universal Off-Line Supplies
Housed in a SO14 package, the DAP018X represents an
enhanced version of the currently available Speedking
controller, the DAP011.
With an internal structure operating at a fixed 65 kHz or
100 kHz frequency, the controller directly connects to the
highvoltage rail for a lossless and clean startup sequence.
Currentmode control also provides an excellent input
audiosusceptibility and inherent pulsebypulse control.
Internal ramp compensation easily prevents subharmonic
oscillations from taking place in continuous conduction
mode designs. On top of these features, the device takes
advantage of the auxiliary winding negative swing to let the
user adjust the maximum power the converter can deliver in
high line conditions (OPP).
When the current setpoint falls below a given value, e.g.
the output power demand diminishes, the IC automatically
freezes the peak current and reduces its switching frequency
down to 25 kHz. At this point, if further output power
reduction occurs, the controller enters skipcycle.
The DAP018X features an efficient protective circuitry
which, in presence of an overcurrent condition, disables the
output pulses while the device enters a safe burst mode,
trying to restart. Once the fault has gone, the device
autorecovers. By implementing a timer to acknowledge a
fault condition, independently from the auxiliary supply, the
designer’s task is eased when stringent fault mode
conditions need to be met.
A dedicated input helps triggering a latchoff circuitry
which permanently disables output pulses, for instance to
implement an over voltage protection (OVP). A separate
input accepts a direct NTC connection to ground for a simple
and efficient over temperature protection (OTP).
Features
Fixedfrequency 65 kHz (A and B versions) or 100 kHz
(C and D versions) Currentmode Control Operation
Internal and Adjustable Over Power Protection (OPP)
Circuit
Frequency Foldback down to 25 kHz and Skipcycle in
Light Load Conditions
Reduced Internal Bias Currents for Improved Standby
Performance
Adjustable Brownout Protection (B and D versions)
Internal Ramp Compensation
Internal Fixed 5 ms SoftStart
Adjustable Frequency Jittering for Better EMI Signature
Autorecovery internal output shortcircuit protection
for A, B, C and D versions. F is latched
Adjustable Timer for Improved Shortcircuit Protection
OTP and OVP Inputs for Improved Robustness
+500 mA / 800 mA Peak Current Capability
Up to 28 V VCC Operation
Improved Creepage Distance between Highvoltage
and Adjacent Pin
Extremely Low Noload Standby Power
This is a PbFree Device
This Device uses HalogenFree Molding Compound
Typical Applications
High Power acdc Converters for TVs, Settop Boxes etc.
Offline Adapters for Notebooks
14
1
SOIC14
D SUFFIX
CASE 751A
x = Device Version
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = PbFree Package
MARKING
DIAGRAM
14
DAP018x
AWLYWWG
1
PIN CONNECTIONS
OPP
OVP
CTimer
Jittering
Fold
FB
CS
1
2
3
4
5
6
7
14 HV
13 NC
12 OTP
11 BO(B&D)
10
9
VCC
DRV
8 GND
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
†For information on tape and reel specifications, including part
orientation and tape sizes, please refer to our Tape and Reel
Packaging Specifications Brochure, BRD8011/D.
*For additional information on our PbFree strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2009
July, 2009 Rev. 0
1
Publication Order Number:
DAP018/D







DAP018D pdf, 数据表
DAP018A/B/C/D/F
8
7.8
7.6
7.4
7.2
7
6.840
15 10 35 60 85 110
TEMPERATURE (°C)
Figure 3. VCC_LATCH vs. Temperature
135
5.1
4.6
4.1
3.6
3.1
2.6
2.1
1.6
1.1
0.640
15 10 35 60 85 110
TEMPERATURE (°C)
Figure 4. ICC2 vs. Temperature
135
35
30
25
20
15
10
5
040 15
10 35 60 85
TEMPERATURE (°C)
110 135
Figure 5. HighVoltage Leakage Curren vs.
Temperature
160
140
120
100
80
60
40
20
0
40 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 6. Propagation Delay vs. Temperature
5.1
4.6
4.1
3.6
3.140 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 7. Fault Timer Level vs. Temperature
0.85
0.84
0.83
0.82
0.81
0.8
0.79
0.78
0.77
0.76
0.75
40 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 8. Current Sense Internal Setpoint vs.
Temperature
http://onsemi.com
8







DAP018D equivalent, schematic
VCC
VFB
IpFlag
Timer
Can be very
slow...
DAP018A/B/C/D/F
regulation
VCClatch
VCCreset
Duration given
by aux. cap.
Current loop
action keeps FB
OK (CC operation)
VCC(on)
VCC(min)
Drv
< 100ms
< 100ms
Figure 35. First Fault Mode Case
First fault mode case, the auxiliary winding collapses but feedback is still there (0.22 mF timer capacitor)
2. In the second case, the converter operates in
regulation, but the output is severely overloaded.
However, due to the bad coupling between the
power and the auxiliary windings, the controller
VCC does not go low. The peak current is pushed
to the maximum and the timer starts to count.
Upon completion, all pulses are stopped and
dualstartup hiccup mode is entered. If the fault
goes away, the SMPS resumes operation.
http://onsemi.com
16










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