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UC1707-SP Scheda tecnica(PDF) 9 Page - Texas Instruments

Il numero della parte UC1707-SP
Spiegazioni elettronici  Dual-Channel Power Driver
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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UC1707-SP Scheda tecnica(HTML) 9 Page - Texas Instruments

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THERMAL
SHUTDOWN
LATCH
5 V
REG
8
6
11
INPUT A
N.I.
INPUT A
INVERT
INPUT B
INVERT
INPUT B
N.I.
+VIN
130 mV
S
R
H ± NO LATCH OR RESET
L ± LATCH ENABLED
LATCH
DISABLE
SHUTDOWN
ANALOG
STOP INV.
ANALOG STOP
NON-INV.
GROUND
4,5,12,13
OUTPUT B
OUTPUT A
+Vc
9
UC1707-SP
www.ti.com
SLUSAG0A – MARCH 2011 – REVISED MARCH 2016
Product Folder Links: UC1707-SP
Submit Documentation Feedback
Copyright © 2011–2016, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
UC1707-SP was designed specifically as a power MOSFET driver for switching-mode power supply applications.
It is capable of providing fast transitions and high-peak current required by power MOSFETs. One of the most
important factors while developing the UC1707-SP was to isolate the high speed switching noise from the low
level analog signals at the PWM. Separate supply and return paths at the driver signal inputs and power outputs
further enhance noise immunity.
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 Shutdown Circuit Description
The function of the circuitry is to be able to provide a shutdown of the device. This is defined as functionality that
will drive both outputs to the low state. There are three different inputs that govern this shutdown capability.
Analog Stop Pins — The differential inputs to this comparator provide a way to execute a shutdown.
Latch Disable Pin — Assuming that the Shutdown pin is left open, a high on this pin disables the latching
functionality of the Analog Stop shutdown. A low on this pin enables the latching functionality of the Analog
Stop shutdown. If a shutdown occurs through the Analog Stop circuit while Latch Disable is high, then the
outputs will go low, but will return to normal operation as soon as the Analog Stop circuit allows it. If a
shutdown occurs through the Analog Stop circuit while Latch Disable is low, then the outputs will go low and
remain low even if the Analog Stop circuit no longer drives the shutdown. The outputs will remain "latched"
low (in shutdown) until the Latch Disable goes high and the Analog Stop circuit allows it to return from
shutdown or the VIN voltage is cycled to 0 V and then returned above 5 V.


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