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參數(shù)資料
| 型號： | 1203P60 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit |
| 中文描述： | PWM電流模式控制器的通用離線Supplies以待機(jī)和短路 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 145K |
| 代理商： | 1203P60 |
Semiconductor Components Industries, LLC, 2004
October, 2004 Rev. 4
1
Publication Order Number:
NCP1203/D
NCP1203
PWM CurrentMode
Controller for Universal
OffLine Supplies Featuring
Standby and Short Circuit
Protection
Housed in SOIC8 or PDIP8 package, the NCP1203 represents a
major leap toward ultracompact Switchmode Power Supplies and
represents an excellent candidate to replace the UC384X devices. Due
to its proprietary SMARTMOS Very High Voltage Technology, the
circuit allows the implementation of complete offline ACDC
adapters, battery charger and a highpower 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 highvoltage
startup FET which ensures a clean and lossless startup sequence. Its
currentmode control naturally provides good audiosusceptibility
and inherent pulsebypulse control.
When the current setpoint falls below a given value, e.g. the output
power demand diminishes, the IC automatically enters the socalled
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 autorecovers. Finally, a
temperature shutdown with hysteresis helps building safe and robust
power supplies.
Features
PbFree Packages are Available
HighVoltage Startup Current Source
AutoRecovery Internal Output ShortCircuit Protection
Extremely Low NoLoad Standby Power
CurrentMode with Adjustable SkipCycle 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
Applications
ACDC Adapters for Notebooks, etc.
Offline Battery Chargers
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
SOIC8
D1, D2 SUFFIX
CASE 751
1
8
MARKING
DIAGRAMS
PIN CONNECTIONS
PDIP8
N SUFFIX
CASE 626
1
8
xx
A
WL, L
Y, YY
W, WW = Work Week
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
1
Adj
8 HV
2
FB
3
CS
4
GND
7 NC
6 V
CC
5 Drv
(Top View)
xxxxxxxxx
AWL
YYWW
1
8
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
ORDERING INFORMATION
http://onsemi.com
xxxxxx
ALYW
1
8
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