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CS3845GDR14 Datasheet(PDF) 1 Page - ON Semiconductor

No. de Pieza. CS3845GDR14
Descripción  Current Mode PWM Control Circuit
Descarga  12 Pages
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Fabricante  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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CS3845GDR14 Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2001
June, 2001 – Rev. 3
1
Publication Order Number:
CS2844/D
CS2844, CS3844, CS2845,
CS3845
Current Mode PWM
Control Circuit with
50% Max Duty Cycle
The CS3844/45 provides all the necessary features to implement
off–line fixed frequency current–mode control with a minimum
number of external components.
The CS3844 family incorporates a new precision
temperature–controlled oscillator to minimize variations in frequency.
An internal toggle flip–flop, which blanks the output every other clock
cycle, limits the duty–cycle range to less than 50%. An undervoltage
lockout ensures that VREF is stabilized before the output stage is
enabled. In the CS2844/CS3844 turn on occurs at 16 V and turn off at
10 V. In the CS2845/CS3845 turn on is at 8.4 V and turn off at 7.6 V.
Other features include low start–up current, pulse–by–pulse current
limiting, and a high–current totem pole output for driving capacitive
loads, such as gate of a power MOSFET. The output is low in the off
state, consistent with N–channel devices.
Features
Optimized for Off–Line Control
Temp. Compensated Oscillator
50% Max Duty–Cycle Clamp
V
REF Stabilized Before Output Stage Is 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
http://onsemi.com
x
= 2 or 3
y
= 4 or 5
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
DIP–8
N SUFFIX
CASE 626
1
8
SO–8
D SUFFIX
CASE 751
1
8
SO–14
D SUFFIX
CASE 751A
1
14
1
8
CSx84yN
AWL
YYWW
MARKING
DIAGRAMS
1
384yD
ALYW
8
1
CSx84yD14
AWLYWW
14
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
SO–16L
DW SUFFIX
CASE 751G
1
16
1
CSx84yDW
AWLYYWW
16


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