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UC2825A-Q1 Fiches technique(PDF) 2 Page - Texas Instruments

No de pièce UC2825A-Q1
Description  HIGH-SPEED PWM CONTROLLER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2825A-Q1 Fiches technique(HTML) 2 Page - Texas Instruments

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DESCRIPTION (CONTINUED)
1
2
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8
16
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9
INV
NI
EAOUT
CLK/LEB
RT
CT
RAMP
SS
VREF
VCC
OUTB
VC
PGND
OUTA
GND
ILIM
DW PACKAGE
(TOP VIEW)
UC2825A-Q1
SLUS781 – SEPTEMBER 2007
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Functional improvements have also been implemented. The shutdown comparator is now a high-speed
overcurrent comparator with a threshold of 1.2 V. The overcurrent comparator sets a latch that ensures full
discharge of the soft-start capacitor before allowing a restart. While the fault latch is set, the outputs are in the
low state. In the event of continuous faults, the soft-start capacitor is fully charged before discharge to insure that
the fault frequency does not exceed the designed soft start period. The CLOCK pin has become CLK/LEB. This
pin combines the functions of clock output and leading edge blanking adjustment and has been buffered for
easier interfacing.
The UC2825A has dual alternating outputs and the same pin configuration of the UC3825. "A" version parts have
UVLO thresholds identical to the original UC3825.
See the application report, The UC3823A,B and UC3825A,B Enhanced Generation of PWM Controllers
(SLUA125) for detailed technical and application information.
ORDERING INFORMATION(1)
MAXIMUM
ORDERABLE PART
TOP-SIDE
TJ
UVLO
PACKAGE(2)
DUTY CYCLE
NUMBER
MARKING
–40
°C to 125°C
<50%
9.2 V/8.4 V
SOIC – DW
Reel of 2000
UC2825AQDWRQ1
UC2825AQDW
(1)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
PIN ASSIGNMENTS
2
Submit Documentation Feedback
Copyright © 2007, Texas Instruments Incorporated


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