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UC2843A-Q1 Datasheet(PDF) 2 Page - Texas Instruments

Part # UC2843A-Q1
Description  CURRENT-MODE PWM CONTROLLER
Download  15 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UC2843A-Q1 Datasheet(HTML) 2 Page - Texas Instruments

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Current
Sense
Comparator
PWM
Latch
GND
Output
V
C
V
5 V
50 mA
REF
V
CC
GND
R /C
T
T
V
FB
COMP
I
SENSE
Internal
Bias
S/R
5-V
REF
V
Good
Logic
REF
UVLO
34 V
2.5 V
Osc
Error
Amp
S
R
2R
R
1 V
7
5
4
2
1
3
5
6
7
8
ABSOLUTE MAXIMUM RATINGS
(1) (2)
UC2843A-Q1
SGLS384 – MAY 2008........................................................................................................................................................................................................ www.ti.com
FUNCTIONAL BLOCK DIAGRAM
over operating free-air temperature range (unless otherwise noted)
VALUE
UNIT
VCC voltage (low impedance source)
30
V
VCC voltage (ICC mA)
Self limiting
IO
Output current
±1
A
Output energy (capacitive load)
5
µJ
Analog inputs (pins 3 and 5)
–0.3 to 6.3
V
Error amplifier output sink current
10
mA
Power dissipation at TA < 25°C (14-pin D package)
1
W
θ
JA
Package thermal impedance(3)
97
°C/W
Tstg
Storage temperature range
–65 to 150
°C
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds
260
°C
(1)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
Unless otherwise indicated, voltages are reference to ground, and currents are positive into and negative out of the specified terminals.
(3)
Long-term high-temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of
overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging.
2
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Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): UC2843A-Q1


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