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UC1846-SP Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce UC1846-SP
Description  RAD-TOLERANT CLASS-V, CURRENT-MODE PWM CONTROLLER
Download  15 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

UC1846-SP Fiches technique(HTML) 1 Page - Texas Instruments

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B Out
V
C
NC
Gnd
A Out
C/S–
C/S+
NC
E/A+
E/A–
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C/L SS
C/S–
C/S+
E/A+
E/A–
Comp
C
T
Shutdown
V
IN
B Out
V
C
Gnd
A Out
Sync
R
T
V
REF
UC1846-SP
www.ti.com
SLUS871B
– JANUARY 2009 – REVISED OCTOBER 2011
RAD-TOLERANT CLASS-V, CURRENT-MODE PWM CONTROLLER
Check for Samples: UC1846-SP
1
FEATURES
FK PACKAGE
QML-V Qualified, SMD 5962-86806
(TOP VIEW)
Rad-Tolerant: 30 kRad (Si) TID (1)
Automatic Feed-Forward Compensation
Programmable Pulse-by-Pulse Current
Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel-Operation Capability for Modular
Power Systems
Differential Current-Sense Amplifier With Wide
Common-Mode Range
Double-Pulse Suppression
500-mA (Peak) Totem-pole Outputs
±1% Bandgap Reference
Undervoltage Lockout
J OR W PACKAGE
(TOP VIEW)
Soft-Start Capability
Shutdown Terminal
500-kHz Operation
(1)
Radiation tolerance is a typical value based upon initial device
qualification with dose rate = 10 mrad/sec. Radiation Lot
Acceptance Testing is available - contact factory for details.
DESCRIPTION
The UC1846 control devices provide all of the necessary features to implement fixed frequency, current mode
control schemes while maintaining a minimum external parts count. The superior performance of this technique
can be measured in improved line regulation, enhanced load response characteristics, and a simpler,
easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability,
automatic symmetry correction for push-pull converters, and the ability to parallel
“power modules" while
maintaining equal current sharing.
Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start
capability. A shutdown function is also available which can initiate either a complete shutdown with automatic
restart or latch the supply off.
Other features include fully latched operation, double-pulse suppression, deadline adjust capability, a
±1%
trimmed bandgap reference, and low outputs in the OFF state.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright
© 2009–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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