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NCP1216_10 Datasheet, PDF (1/18 Pages) ON Semiconductor – PWM Current-Mode Controller for High-Power Universal Off-Line Supplies | |||
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NCP1216, NCP1216A
PWM Current-Mode
Controller for High-Power
Universal Off-Line Supplies
Housed in a SOICâ8 or PDIPâ7 package, the NCP1216 represents
an enhanced version of NCP1200 based controllers. Due to its high
drive capability, NCP1216 drives large gateâcharge MOSFETs, which
together with internal ramp compensation and builtâin frequency
jittering, ease the design of modern ACâDC adapters.
With an internal structure operating at different fixed frequencies,
the controller supplies itself from the highâvoltage rail, avoiding the
need of an auxiliary winding. This feature naturally eases the designer
task in some particular applications, e.g. battery chargers or TV sets.
Currentâmode control also provides an excellent input audio
susceptibility and inherent pulseâbyâpulse control. Internal ramp
compensation easily prevents subâharmonic 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 soâcalled
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.
The NCP1216 features an efficient protective circuitry, which in
presence of an over current condition disables the output pulses while
the device enters a safe burst mode, trying to restart. Once the default
has gone, the device autoârecovers.
Features
⢠No Auxiliary Winding Operation
⢠CurrentâMode Control with Adjustable SkipâCycle Capability
⢠Internal Ramp Compensation
⢠Limited Duty Cycle to 50% (NCP1216A Only)
⢠Internal 1.0 ms SoftâStart (NCP1216A Only)
⢠BuiltâIn Frequency Jittering for Better EMI Signature
⢠AutoâRecovery Internal Output ShortâCircuit Protection
⢠Extremely Low NoâLoad Standby Power
⢠500 mA Peak Current Capability
⢠Fixed Frequency Versions at 65 kHz, 100 kHz, 133 kHz
⢠Internal Temperature Shutdown
⢠Direct Optocoupler Connection
⢠SPICE Models Available for TRANsient and AC Analysis
⢠PinâtoâPin Compatible with NCP1200 Series
⢠These are PbâFree and HalideâFree Devices
Typical Applications
⢠High Power ACâDC Converters for TVs, SetâTop Boxes, etc.
⢠Offline Adapters for Notebooks
⢠Telecom DCâDC Converters
⢠All Power Supplies
http://onsemi.com
MARKING
DIAGRAMS
8
1
SOICâ8
D SUFFIX
CASE 751
8
16XXX
ALYW
G
1
PDIPâ7
P SUFFIX
CASE 626B
P1216XXXX
AWL
YYWWG
1
XXXX = Specific Device Code
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = PbâFree Package
DEVICE MARKING INFORMATION
See detailed device marking information in the ordering
information section on page 16 of this data sheet.
PIN CONNECTIONS
Adj 1
FB 2
CS 3
Gnd 4
8 HV
7 NC
6 VCC
5 Drv
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 16 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
1
December, 2010 â Rev. 13
Publication Order Number:
NCP1216/D
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