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  ON Semiconductor Electronic Components Datasheet  

DAP011C Datasheet

PWM Current-Mode Controller

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DAP011C pdf
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
NC
LATCH
CTIMER
JITTER
SKIP
FB
CS
1
2
3
4
5
6
7
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
November, 2005 − Rev. 2
1
Publication Order Number:
DAP011/D
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  ON Semiconductor Electronic Components Datasheet  

DAP011C Datasheet

PWM Current-Mode Controller

No Preview Available !

DAP011C pdf
HV−Bulk
OVP
+
DAP011/DAP011C
DAP011/DAP011C
1 14
*See
Note
2 13
3 12
4 11 5 V Ref.
5 10
69
78
+
Gnd
Vout
Skip Freq.
Adj. Jitter
Ramp
+
Timer
Delay
Gnd
*This resistor prevents from negatively biasing the HV pin (14) at power−off. Typical value is 4.7 kW.
Figure 1. Typical Application Example
ÁÁÁÁÁÁPPiInNÁÁÁNFoU.ÁÁÁNCPTÁÁÁiInONNÁÁÁamDeEÁÁÁSCÁÁÁRIPÁÁÁTIOÁÁÁN ÁÁÁFunÁÁÁctionÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDÁÁÁescÁÁÁriptiÁÁÁon ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
1 NC
2
Latch
Input voltage to latch comparator
By bringing this pin above 3.0 V, e.g. via a Zener or an NTC, the circuit
permanently latches−off.
3
CTimer
Timer/soft−start delay
Wiring a capacitor to ground helps selecting the timer duration. 10% of
this duration fixes the soft−start period.
4
Jitter
Frequency jittering speed
This pin offers a way to adjust the frequency modulation pace.
5 Skip Skip cycle adjustment
By connecting a resistor to ground, it becomes possible to alter the
default skip cycle level.
6 FB Feedback pin
Hooking an optocoupler collector to this pin will allow regulation.
7 CS Current sense + ramp
compensation
This pin monitors the primary peak current but also offers a mean to
introduce ramp compensation.
8 GND
− The controller ground.
9
DRV
Driver output
The driver’s output to an external MOSFET.
10
VCC
Supplies the controller
This pin is connected to an external auxiliary voltage.
11 Ref. Reference voltage
This pin delivers 5.0 V and sources up to 5.0 mA.
12 NC
− Non−connected for improved creepage.
13 NC
− Non−connected for improved creepage.
14 HV High−voltage input
Connected to the bulk capacitor, this pin powers the internal current
source to deliver a startup current.
http://onsemi.com
2
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Part Number DAP011C
Description PWM Current-Mode Controller
Maker ON Semiconductor
Total Page 24 Pages
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