NCP1201
PWM Current鈭扢ode
Controller for Universal
Off鈭扡ine Supplies Featuring
Low Standby Power with
Fault Protection Modes
Housed in SO鈭? or DIP8 package, the NCP1201 enhances the
previous NCP1200 series by offering a reduced optocoupler current
with additional brownout detection protection (BOK). Similarly, the
circuit allows the implementation of complete off鈭抣ine AC/DC
adapters, battery charger or Switch Mode Power Supplies (SMPS)
where standby power is a key parameter.
The NCP1201 features an efficient protection circuitry, whenever in
presence of a fault (e.g. failed optocoupler, overcurrent condition, etc.)
the control permanently disables the output pulses to avoid subsequent
damage to the system. The IC only restarts when the user cycles the
mains power supply.
With the low power internal structure, operating at a fixed 60 or 100
kHz, the controller supplies itself from the high鈭抳oltage rail, avoiding
the need of an auxiliary winding. This feature naturally eases the
designer鈥檚 task in battery charger applications. Finally, current鈭抦ode
control provides an excellent audio鈭抯usceptibility and inherent
pulse鈭抌y鈭抪ulse control.
When the load current falls down to a pre鈭抎efined setpoint (V
SKIP
)
value, e.g. the output power demand diminishes, the IC automatically
enters the skip cycle mode and can provide excellent efficiency under
light load conditions. The skip mode is designed to operate at
relatively lower peak current so that acoustic noise commonly takes
place will not happen with NCP1201.
Features
http://onsemi.com
MARKING
DIAGRAMS
8
SO鈭?
D SUFFIX
CASE 751
1
8
DIP鈭?
P SUFFIX
CASE 626
8
1
y
y
xx
xx
A
L
Y, YY
W, WW
1
= Device Code: 6 for 60 kHz
= Device Code:
1 for 100 kHz
= Device Code: 60 for 60 kHz
= Device Code:
10 for 100 kHz
= Assembly Location
= Wafer Lot
= Year
= Work Week
1201Pxx
AWL
YYWW
1
201Dy
ALYW
8
PIN CONNECTIONS
BOK
FB
CS
GND
1
2
3
4
(Top View)
8
7
6
5
HV
NC
VCC
DRV
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No Auxiliary Winding Operation
AC Line Brownout Detect Protection, BOK Function
Internal Output Short鈭扖ircuit Protection
Latch鈭抩ff Mode Fault Protection
Current鈭扢ode with Skip鈭扖ycle Capability
Extremely Low No鈭扡oad Standby Power
Internal Leading Edge Blanking
250 mA Gate Peak Current Driving Capability
Internally Fixed Switching Frequency at 60 or 100 kHz
Built鈭抜n Frequency Jittering for EMI Reduction
Direct Optocoupler Connection
Internal Over Temperature Shutdown
ORDERING INFORMATION
Device
NCP1201P60
NCP1201D60R2
NCP1201P100
NCP1201D100R2
Package
PDIP鈭?
SO鈭?
PDIP鈭?
SO鈭?
Shipping
50 Units/Rail
2500 Units/Rail
50 Units/Rail
2500 Units/Rail
Typical Applications
鈥?/div>
AC/DC Adapters
鈥?/div>
Offline Battery Chargers
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Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
漏
Semiconductor Components Industries, LLC, 2003
1
November, 2003 鈭?Rev. 1
Publication Order Number:
NCP1201/D
NCP1201/D相關(guān)型號(hào)PDF文件下載
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型號(hào)
版本
描述
廠商
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