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DAP011 Datasheet PDF : 24 Pages
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Customer Specific Device from ON Semiconductor
DAP011/DAP011C
PWM Current−Mode
Controller for High−Power
Universal Off−Line Supplies
Housed in an SO−14 package, the DAP011/DAP011C
represents an enhanced version of the Maximus, DAP008,
controller. Due to its high drive capability, SpeedKing drives
large gate−charge MOSFETs which, together with internal
ramp compensation and a user selectable frequency
jittering, ease the design of modern AC/DC adapters.
With an internal structure operating at a fixed 65/100 kHz
frequency, the controller directly connects to the
high−voltage rail for a loss less and clean startup sequence.
Current−mode control also provides an excellent input
audio−susceptibility and inherent pulse−by−pulse control.
Internal ramp compensation easily prevents subharmonic
oscillations from taking place in continuous conduction
mode designs.
When the current setpoint falls below a given value, e.g. the
output power demand diminishes, the IC automatically enters
the so−called skip cycle mode and provides excellent
efficiency at light loads. Because this occurs at a user
adjustable low peak current, no acoustic noise takes place. Due
to a proprietary SoftSkip technique, the absence of sharp
transitions during skip mode significantly reduces acoustical
noise.
The DAP011/DAP011C 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 default has gone, the device
auto−recovers. 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 latch−off circuitry
which permanently disables output pulses.
Features
• Current−Mode Control with Adjustable Skip−Cycle
Capability
• Internal Ramp Compensation
• Adjustable Frequency Jittering for Better EMI
Signature
• Auto−Recovery Internal Output Short−Circuit
Protection
• Adjustable Timer for Improved Short−Circuit
Protection
• Dedicated Latch Input
• +500 mA/−800 mA Peak Current Capability
• Fixed Frequency Versions at 65/100 kHz
• 5.0 V – 5.0 mA Reference Voltage
• Internal Temperature Shutdown
• Direct Optocoupler Connection
• Extremely Low No−Load Standby Power
• Adjustable Soft−Start
• This is a Pb−Free Device*
Typical Applications
• High Power AC/DC Converters for TVs, Set−Top
Boxes, etc.
• Offline Adapters for Notebooks
• All Power Supplies
14
1
MARKING
DIAGRAM
14
SOIC−14
D SUFFIX
CASE 751A
DAP011/DAP011C
AWLYWWG
1
A
= Assembly Location
WL = Wafer Lot
Y
= Year
WW = Work Week
G
= Pb−Free Package
PIN CONNECTIONS
1
NC
2
LATCH
3
CTIMER
4
JITTER
5
SKIP
6
FB
7
CS
14
HV
13 NC
12 NC
11 REF
10
VCC
9 DRV
8
GND
(Top View)
Device
DAP011
DAP011C
ORDERING INFORMATION
fosc
Package
Shipping†
(65 kHz)
(100 kHz)
SO−14 2500 / Tape & Reel
(Pb−Free)
†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 Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
November, 2005 − Rev. 2
Publication Order Number:
DAP011/D
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