cs2843aln8 ON Semiconductor, cs2843aln8 Datasheet

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cs2843aln8

Manufacturer Part Number
cs2843aln8
Description
Off?line Current Mode Pwm Control Circuit With Undervoltage Lockout
Manufacturer
ON Semiconductor
Datasheet
CS2842A, CS3842A,
CS2843A, CS3843A
Off−Line Current Mode
PWM Control Circuit with
Undervoltage Lockout
implement off−line fixed frequency current−mode control with a
minimum number of external components.
temperature−controlled oscillator with an internally trimmed
discharge current to minimize variations in frequency. A precision
duty−cycle clamp eliminates the need for an external oscillator when a
50% duty−cycle is used. Duty−cycles greater than 50% are also
possible. On board logic ensures that V
output stage is enabled. Ion implant resistors provide tighter control of
undervoltage lockout.
limiting, and a high−current totem pole output for driving capacitive
loads, such as the gate of power MOSFET. The output is LOW in the
off state, consistent with N−channel devices.
8 and14 lead packages for surface mount (SO) applications as well as
8 lead PDIP packages.
Features
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
The CS284XA, CS384XA provides all the necessary features to
T h e C S 3 8 4 X A f a m i l y i n c o r p o r a t e s a n e w p r e c i s i o n
Other features include low startup current, pulse−by−pulse current
The CS384XA series of current−mode control ICs are available in
Optimized for Off−line Control
Internally Trimmed Temperature Compensated Oscillator
Maximum Duty−Cycle Clamp
V
Low Startup Current
Pulse−By−Pulse Current Limiting
Improved Undervoltage Lockout
Double Pulse Suppression
1.0% Trimmed Bandgap Reference
High Current Totem Pole Output
REF
Stabilized Before Output Stage is Enabled
REF
is stabilized before the
1
8
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
14
8
1
1
1
ORDERING INFORMATION
x
y
A
WL, L
YY, Y
WW, W = Work Week
http://onsemi.com
CASE 751A
CASE 626
CASE 751
N SUFFIX
D SUFFIX
D SUFFIX
SO−14
= 2 or 3
= 2 or 3
= Assembly Location
= Wafer Lot
= Year
DIP−8
SO−8
Publication Order Number:
14
1
MARKING
DIAGRAM
1
8
CSx84yA
AWLYWW
8
1
ALYWX
x84yA
x84yA
YYWW
CS2842A/D
AWL

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cs2843aln8 Summary of contents

Page 1

CS2842A, CS3842A, CS2843A, CS3843A Off−Line Current Mode PWM Control Circuit with Undervoltage Lockout The CS284XA, CS384XA provides all the necessary features to implement off−line fixed frequency current−mode control with a minimum number of external components ...

Page 2

DIP−8 & SO− COMP V REF Sense V OUT OSC GND V CC Undervoltage Lock−out Circuit 34 V GND 16 V/10 V (8.4 V/7.6 V) 2.50 V OSC Oscillator + 2R V − V ...

Page 3

MAXIMUM RATINGS* Supply Voltage (I < 30 mA) CC Supply Voltage (Low Impedance Source) Output Current Output Energy (Capacitive Load) Analog Inputs (V , Sense) FB Error Amp Output Sink Current Package Thermal Resistance, PDIP−8 Junction−to−Case, R θJC Junction−to−Ambient, R ...

Page 4

ELECTRICAL CHARACTERISTICS (continued V 680 Ω 0.022 μF for triangular mode unless otherwise stated.) Characteristic Error Amp Section Input Voltage V Input Bias Current V A 2.0 ≤ V ...

Page 5

ELECTRICAL CHARACTERISTICS (continued V 680 Ω 0.022 μF for triangular mode unless otherwise stated.) Characteristic Test Conditions Undervoltage Lockout Section Start Threshold Min. Operating Voltage After Turn On *Adjust ...

Page 6

ERROR AMP ADJUST 5.0 kΩ Sense 4.7 kΩ ADJUST V CC ON/OFF Command CSX842A OFF I CC < < 1 ...

Page 7

V REF * V lower REF * V upper V REF * lower REF * I ...

Page 8

... ORDERING INFORMATION Device Temperature Range CS2842ALN8 CS2843ALN8 −25°C to 85°C CS2842ALD14 CS2842ALDR14 CS3842AGN8 CS3842AGD8 CS3842AGDR8 CS3842AGD14 CS3842AGDR14 0°C to 70°C CS3843AGN8 CS3843AGD8 CS3843AGDR8 CS3843AGD14 CS3843AGDR14 Package DIP−8 DIP−8 SO−14 SO−14 DIP−8 SO−8 SO−8 SO−14 SO−14 DIP−8 SO− ...

Page 9

F −A− NOTE 2 C −T− N SEATING PLANE 0.13 (0.005) M −X− −Y− −Z− 0.25 (0.010 ...

Page 10

... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...

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