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UC1875-SP Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce UC1875-SP
Description  Rad-Tolerant Class-V, Phase Shift Resonant Controller
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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UC1875-SP
SLUSAQ9B – DECEMBER 2011 – REVISED DECEMBER 2015
UC1875-SP Rad-Tolerant Class-V, Phase Shift Resonant Controller
1 Features
3 Description
The UC1875-SP implements control of a bridge
1
QML-V Qualified, SMD 5962-94555
power stage by phase-shifting the switching of one
Rad-Tolerant: 50 kRad (Si) TID (1)
half-bridge
with
respect
to
the
other,
allowing
Zero to 100% Duty Cycle Control
constant
frequency
pulse-width
modulation
in
combination with resonant, zero-voltage switching for
Programmable Output Turn-On Delay
high efficiency performance at high frequencies. This
Compatible with Voltage or Current Mode
circuit may be configured to provide control in either
Topologies
voltage or current mode operation, with a separate
Practical Operation at Switching Frequencies to
overcurrent shutdown for fast fault protection.
1 MHz
A programmable time delay is provided to insert a
Four 2-A Totem Pole Outputs
dead-time at the turn-on of each output stage. This
delay, providing time to allow the resonant switching
10-MHz Error Amplifier
action, is independently controllable for each output
Undervoltage Lockout (UVLO)
pair (A-B, C-D).
Low Startup Current – 150 µA
With the oscillator capable of operation at frequencies
Outputs Active Low During UVLO
in excess of 2 MHz, overall switching frequencies to
Soft-Start Control
1 MHz are practical. In addition to the standard free
Latched Overcurrent Comparator With Full Cycle
running mode, with the CLOCKSYNC pin, the user
may configure these devices to accept an external
Restart
clock synchronization signal, or may lock together up
Trimmed Reference
to 5 units with the operational frequency determined
by the fastest device.
2 Applications
Power FPGAs
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LCCC (28)
11.43 mm × 11.43 mm
UC1875-SP
CDIP (20)
24.20 mm × 6.92 mm
CFP (24)
14.36 mm × 9.09 mm
(1)
Radiation tolerance is a typical value based upon initial device
qualification with a dose rate = 10 mrad/sec and applies to the
(1) For all available packages, see the orderable addendum at
5962-9455502 devices. Radiation lot acceptance testing is
the end of the data sheet.
available – contact factory for details.
Block Diagram
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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