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DAP018D Schematic ( PDF Datasheet ) - ON Semiconductor

Teilenummer DAP018D
Beschreibung PWM Current-Mode Controller
Hersteller ON Semiconductor
Logo ON Semiconductor Logo 




Gesamt 28 Seiten
DAP018D Datasheet, Funktion
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 Datasheet, Funktion
DAP018A/B/C/D/F
ELECTRICAL CHARACTERISTICS
(For typical values TJ = 25°C, for min/max values TJ = 25°C to +125°C, Max TJ = 150°C, VCC = 12 V unless otherwise noted)
DRIVE OUTPUT
Symbol
Rating
Pin Min Typ Max Unit
Tf Output voltage falltime @ CL = 1 nF, 1090% of a 12 V output signal
Isource Source current capability at VDRV = 10.5 V
Isink
Sink current capability at VDRV = 0 V
VDRVlow DRV pin level at VCC close to VCC(min) with a 33 kW resistor to GND
VDRVhigh DRV pin level at VCC = 28 V
CURRENT COMPARATOR
9 25 ns
9 500 mA
9 800 mA
9 7.6
V
9 10 15 17 V
Symbol
Rating
Pin Min Typ Max Unit
IIB
VLimit
TDEL
TLEB
TSS
Input Bias Current @ 0.8 V input level on pin 7
Maximum internal current setpoint – pin1 grounded
Propagation delay from current detection to gate offstate
Leading Edge Blanking Duration
Internal softstart duration activated upon startup, autorecovery and BO
release for versions B & D, pin 1 grounded.
7 0.02 mA
7 0.76 0.8 0.84 V
7 100 150 ns
7 140 ns
5 ms
IOPPo Setpoint decrease for pin 1 biased to –300 mV (Note 1)
1 37.5 %
IOOPv Voltage setpoint for pin 1 biased to 300 mV (Note 1)
1 0.46 0.5 0.54 V
IOPPs Setpoint decrease for pin 1grounded
1 0%
INTERNAL OSCILLATOR
Symbol
Rating
Pin Min Typ Max Unit
fOSC
fOSC
Dmax
fjitter
fswing
ICjit
VCjitP
Oscillation frequency (65 kHz version, A & B)
Oscillation frequency (100 kHz version, C & D)
Maximum dutycycle
Frequency jittering in percentage of fOSC
Swing frequency with a 22 nF capacitor to pin 4
Jittering modulator charging current
Jittering capacitor peak voltage
60 65 70 kHz
92 100 108 kHz
76 80 84 %
±5 %
4 300 Hz
4 18 mA
4 2.2 V
VCjitV Jittering capacitor valley voltage
4 0.8 V
FEEDBACK SECTION
Symbol
Rating
Pin Min Typ Max Unit
Rup Internal pullup resistor
RFB Equivalent resistor on FB pin
Iratio Pin 6 to current setpoint division ratio
FREQUENCY FOLDBACK
6 20 kW
16 kW
4.2 kW
Symbol
Rating
Pin Min Typ Max Unit
Ifold Internal foldback reference current
5 8.5 10 11.5 mA
Vfold
Frequency folback level with a 100 kW resistor to ground
51V
Iskip Skip current in percentage of the maximum excursion, for Vfold = 1 V
30 %
Ftrans Transition frequency below which skipcycle occurs for TJ = 25°C
– 21 25 29 kHz
Vskip Skipcycle level voltage on the feedback pin
6 320 mV
1. See characterization table for linearity over negative bias voltage.
2. Guaranteed by design.
3. The OTP parameters are selected to cope with a TTC03474 which offers a resistance of 8.8 kW when heated to a temperature of 110°C.
4. The brownout circuitry is disabled on versions A & C and operates on versions B & D.
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DAP018D pdf, datenblatt
DAP018A/B/C/D/F
1.06
1.04
1.02
1
0.98
0.96
0.9440
15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 27. VOTP Voltage vs. Temperature
1.06
1.04
1.02
1
0.98
0.96
0.9440 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 28. Brownout Level vs. Temperature
10.9
10.4
9.9
9.4
8.940 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 29. Brownout Hysteresis Current vs.
Temperature
8.9
7.9
6.9
5.9
4.9
3.9
2.9
40 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 30. IC2 Startup Current vs. Temperature
1800
1600
1400
1200
1000
800
600
400
200
0
40 15 10 35 60 85 110 135
TEMPERATURE (°C)
Figure 31. IC1 Startup Current vs. Temperature
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