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CS2841B Arkusz danych(PDF) 1 Page - ON Semiconductor

Numer części CS2841B
Szczegółowy opis  Automotive Current Mode PWM Control Circuit
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2005
September, 2005 − Rev. 7
1
Publication Order Number:
CS2841B/D
CS2841B
Automotive Current Mode
PWM Control Circuit
The CS2841B provides all the necessary features to implement
off−line fixed frequency current−mode control with a minimum
number of external components.
The CS2841B (a variation of the CS2843A) is designed specifically
for use in automotive operation. The low start threshold voltage of 8.0 V
(typ), and the ability to survive 40 V automotive load dump transients
are important for automotive subsystem designs. The CS2841 series
has a history of quality and reliability in automotive applications.
The CS2841B incorporates a precision temperature−controlled
oscillator with an internally trimmed discharge current to minimize
variations in frequency. Duty−cycles greater than 50% are also
possible. On board logic ensures that VREF is stabilized before the
output stage is enabled. Ion implant resistors provide tighter control of
undervoltage lockout.
Features
Optimized for Off−Line Control
Internally Trimmed Temperature Compensated Oscillator
Maximum Duty−Cycle Clamp
VREF Stabilized Before Output Stage Enabled
Low Start−Up Current
Pulse−By−Pulse Current Limiting
Improved Undervoltage Lockout
Double Pulse Suppression
1.0 % Trimmed Bandgap Reference
High Current Totem Pole Output
Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
CS2841B = Device Code
A
= Assembly Location
WL
= Wafer Lot
YY, Y
= Year
WW
= Work Week
G
= Pb−Free Package
PDIP−8
N SUFFIX
CASE 626
PIN CONNECTIONS AND
MARKING DIAGRAM
VREF
VCC
VOUT
GND
COMP
VFB
Sense
OSC
1
8
SOIC−14
D SUFFIX
CASE 751A
GND
OSC
PWR GND
NC
VOUT
Sense
VCC PWR
NC
VCC
VFB
NC
NC
VREF
COMP
1
14
SOIC−14
PDIP−8
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
ORDERING INFORMATION


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