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UC2849DW Fiches technique(PDF) 2 Page - Texas Instruments

No de pièce UC2849DW
Description  SECONDARY SIDE AVERAGE CURRENT MODE CONTROLLER
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Site Internet  http://www.ti.com
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UC2849DW Fiches technique(HTML) 2 Page - Texas Instruments

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DESCRIPTION (cont.)
CONNECTION DIAGRAMS
DIL-24, SOIC-24 (TopView)
NandDWPackages
QPackage
PLCC-28(TopView)
ABSOLUTE MAXIMUM RATINGS
(1)
RECOMMENDED OPERATING CONDITIONS
UC2849
UC3849
SLUS360C – JULY 1995 – REVISED AUGUST 2007
The UC3849 features load share, oscillator synchronization, undervoltage lockout, and programmable output
control. Multiple chip operation can be achieved by connecting up to ten UC3849 chips in parallel. The SHARE
bus and CLKSYN bus provide load sharing and synchronization to the fastest oscillator respectively. The
UC3849 is an ideal controller to achieve high power, secondary side average current mode control.
VALUE
UNIT
Supply Voltage (VCC)
20
V
Output current source or sink
0.3
A
Analog input voltages
–0.3 to 7
V
ILIM, KILL, SEQ, ENBL, RUN
–0.3 to 7
CLKSYN current source
12
RUN current sink
15
mA
SEQ current sink
20
RDEAD current sink
20
Share bus voltage (voltage with respect to GND)
0 to 6.2
ADJ voltage (voltage with respect to GND)
0.9to 6.3
V
VVEE (voltage with respect to GND)
–1.5
Storage temperaturee
–65 to 150
Junction temperature
–65 to 150
°C
Lead temperature (soldering, 10 sec.)
300
(1)
All voltages with respect to VEE except where noted; all currents are positive into, negative out of the specified terminal.
MIN
MAX
UNIT
Input voltage
8
20
V
Sink/source output current
250
mA
2
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