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UC1846-SP датащи(PDF) 1 Page - Texas Instruments

номер детали UC1846-SP
подробное описание детали  Current-Mode PWM Controller
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UC1846-SP датащи(HTML) 1 Page - Texas Instruments

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UC1846-SP
SLUS871C – JANUARY 2009 – REVISED OCTOBER 2015
UC1846-SP Rad-Tolerant Class-V, Current-Mode PWM Controller
1 Features
3 Description
The UC1846-SP control devices provide all of the
1
QML-V Qualified, SMD 5962-8680603VxA (1)
necessary features to implement fixed frequency,
Rad-Tolerant: 40 kRad (Si) TID
current mode control schemes while maintaining a
Automatic Feed-Forward Compensation
minimum
external
parts
count.
The
superior
performance of this technique can be measured in
Programmable Pulse-by-Pulse Current Limiting
improved line regulation, enhanced load response
Automatic Symmetry Correction in Push-Pull
characteristics,
and
a
simpler,
easier-to-design
Configuration
control loop. Topological advantages include inherent
Enhanced Load Response Characteristics
pulse-by-pulse current limiting capability, automatic
symmetry correction for push-pull converters, and the
Parallel-Operation Capability for Modular Power
ability to parallel power modules while maintaining
Systems
equal current sharing.
Differential Current-Sense Amplifier With Wide
Protection
circuitry
includes
built-in
UVLO
and
Common-Mode Range
programmable current limit in addition to soft start
Double-Pulse Suppression
capability. A shutdown function is also available
500-mA (Peak) Totem-Pole Outputs
which can initiate either a complete shutdown with
±1% Bandgap Reference
automatic restart or latch the supply off.
Undervoltage Lockout (UVLO)
Other features include fully latched operation, double-
Soft-Start Capability
pulse suppression, deadline adjust capability, a ±1%
trimmed bandgap reference, and low outputs in the
Shutdown Terminal
OFF state.
500-kHz Operation
Device Information(1)
2 Applications
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DC-DC Converters
CDIP (16)
6.92 mm × 19.56 mm
Satellite Buses and Payloads
CFP (16)
6.73 mm × 10.30 mm
UC1846-SP
Space Launch Vehicles
LCCC (20)
8.89 mm × 8.89 mm
KGD
N/A
Undersea Cabling
Available in Military Temperature Range (–55°C to
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
125°C)
Supports Various Topologies:
Block Diagram
Flyback, Forward, Buck, Boost
Push-Pull, Half-Bridge, Full Bridge With
External Interface Circuit
(1)
Radiation tolerance is a typical value based upon initial device
qualification with dose rate = 10 mRad/s. Radiation Lot
Acceptance Testing is available - contact factory for details.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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