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NCP1203_05

Description
0.25 A SWITCHING CONTROLLER, 47 kHz SWITCHING FREQ-MAX, PDIP8
Categorysemiconductor    Analog mixed-signal IC   
File Size254KB,15 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Download Datasheet Parametric View All

NCP1203_05 Overview

0.25 A SWITCHING CONTROLLER, 47 kHz SWITCHING FREQ-MAX, PDIP8

NCP1203_05 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals8
Rated input voltage11 V
Minimum limit input voltage8.4 V
Maximum operating temperature125 Cel
Minimum operating temperature-40 Cel
Processing package descriptionHALOGEN FREE AND ROHS COMPLIANT, PLASTIC, DIP-8
Lead-freeYes
EU RoHS regulationsYes
China RoHS regulationsYes
stateACTIVE
packaging shapeRECTANGULAR
Package SizeIN-LINE
Terminal formTHROUGH-HOLE
Terminal spacing2.54 mm
terminal coatingMATTE TIN
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelAUTOMOTIVE
control modePEAK CURRENT
Control TechnologyPULSE WIDTH MODULATION
Maximum output current0.2500 A
Analog IC other typesSWITCHING CONTROLLER
Switch configurationSINGLE
Maximum switching frequency47 kHz
NCP1203
PWM Current-Mode
Controller for Universal
Off-Line Supplies Featuring
Standby and Short Circuit
Protection
Housed in SOIC−8 or PDIP−8 package, the NCP1203 represents a
major leap toward ultra−compact 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 off−line AC−DC
adapters, battery charger and a high−power 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−voltage
startup FET which ensures a clean and loss−less startup sequence. Its
current−mode control naturally provides good audio−susceptibility
and inherent pulse−by−pulse control.
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 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−recovers. Finally, a
temperature shutdown with hysteresis helps building safe and robust
power supplies.
Features
www.onsemi.com
MARKING
DIAGRAM
8
8
1
x
A
L
Y
W
G
SOIC−8
D1, D2 SUFFIX
CASE 751
1
= 4, 6, or 1
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
8
PDIP−8
N SUFFIX
CASE 626
1
xx
A
WL
YY
WW
G
1
= 40, 60, or 100
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
1203Pxx
AWL
YYWWG
203Dx
ALYW
G
8
High−Voltage Startup Current Source
Auto−Recovery Internal Output Short−Circuit Protection
Extremely Low No−Load Standby Power
Current−Mode with Adjustable Skip−Cycle 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
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
PIN CONNECTIONS
Adj 1
FB 2
CS 3
GND 4
(Top View)
8 HV
7 NC
6 V
CC
5 Drv
Applications
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
AC−DC Adapters for Notebooks, etc.
Offline Battery Chargers
Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
©
Semiconductor Components Industries, LLC, 2015
April, 2015
Rev. 12
1
Publication Order Number:
NCP1203/D
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