NCP1203
PWM Current鈭扢ode
Controller for Universal
Off鈭扡ine Supplies Featuring
Standby and Short Circuit
Protection
Housed in SOIC鈭? or PDIP鈭? package, the NCP1203 represents a
major leap toward ultra鈭抍ompact Switchmode Power Supplies and
represents an excellent candidate to replace the UC384X devices. Due
to its proprietary SMARTMOSt Very High Voltage Technology, the
circuit allows the implementation of complete off鈭抣ine AC鈭扗C
adapters, battery charger and a high鈭抪ower SMPS with few external
components.
With an internal structure operating at a fixed 40 kHz, 60 kHz or
100 kHz switching frequency, the controller features a high鈭抳oltage
startup FET which ensures a clean and loss鈭抣ess startup sequence. Its
current鈭抦ode control naturally provides good audio鈭抯usceptibility
and inherent pulse鈭抌y鈭抪ulse control.
When the current setpoint falls below a given value, e.g. the output
power demand diminishes, the IC automatically enters the so鈭抍alled
skip cycle mode and provides improved efficiency at light loads
while offering excellent performance in standby conditions. Because
this occurs at a user adjustable low peak current, no acoustic noise
takes place.
The NCP1203 also includes an efficient protective circuitry which,
in presence of an output over load condition, disables the output
pulses while the device enters a safe burst mode, trying to restart.
Once the default has gone, the device auto鈭抮ecovers. Finally, a
temperature shutdown with hysteresis helps building safe and robust
power supplies.
Features
http://onsemi.com
MARKING
DIAGRAMS
8
8
1
SOIC鈭?
D1, D2 SUFFIX
CASE 751
1
8
PDIP鈭?
N SUFFIX
CASE 626
1
xx
A
WL, L
Y, YY
W, WW
1
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
xxxxxxxxx
AWL
YYWW
xxxxxx
ALYW
G
8
PIN CONNECTIONS
Adj 1
FB 2
CS 3
GND 4
(Top View)
8 HV
7 NC
6 V
CC
5 Drv
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Pb鈭扚ree Packages are Available
High鈭扸
oltage Startup Current Source
Auto鈭扲ecovery Internal Output Short鈭扖ircuit Protection
Extremely Low No鈭扡oad Standby Power
Current鈭扢ode with Adjustable Skip鈭扖ycle Capability
Internal Leading Edge Blanking
250 mA Peak Current Capability
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
Direct Optocoupler Connection
Undervoltage Lockout at 7.8 V Typical
SPICE Models Available for TRANsient and AC Analysis
Pin to Pin Compatible with NCP1200
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
Applications
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AC鈭扗C Adapters for Notebooks, etc.
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Offline Battery Chargers
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Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
漏
Semiconductor Components Industries, LLC, 2004
1
October, 2004鈭?Rev. 4
Publication Order Number:
NCP1203/D
1203P60相關(guān)型號PDF文件下載
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TOOL TABLE TOP CRIMPING PLIERS
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Rack Hardware Key
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TOOL CRIMPING PLIERS F/FERRULES
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Crimping, Stripping, Cutting Tools & Drills CRIMPFOX INC...
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TOOL CRIMP PLIERS FOR TERM ENDS
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TOOL CRIMPING PLIERS WITH GUIDE
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TOOL INTERCHANGEABLE BATTERY
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PWM Current-Mode Controller for Universal Off-Line Supplies ...
ONSEMI
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PWM Current-Mode Controller for Universal Off-Line Supplies ...
ONSEMI [ON...
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Male Insert 10+Ground Position Screw
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CIT SWITCH
CIT [CIT Relay ...
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