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What is UC3725?

This electronic component, produced by the manufacturer "Unitrode", performs the same function as "Isolated High Side FET Driver".


UC3725 Datasheet PDF - Unitrode

Part Number UC3725
Description Isolated High Side FET Driver
Manufacturers Unitrode 
Logo Unitrode Logo 


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Isolated High Side FET Driver
UC1725
UC2725
UC3725
FEATURES
Receives Both Power and Signal Across
the Isolation Boundary
9 to 15 Volt High Level Gate Drive
Under-voltage Lockout
Programmable Over-current Shutdown
and Restart
Output Enable Function
DESCRIPTION
The UC1725 and its companion chip, the UC1724, provide all the nec-
essary features to drive an isolated MOSFET transistor from a TTL in-
put signal. A unique modulation scheme is used to transmit both power
and signals across an isolation boundary with a minimum of external
components.
Protection circuitry, including under-voltage lockout, over-current shut-
down, and gate voltage clamping provide fault protection for the MOS-
FET. High level gate drive is guaranteed to be greater than 9 volts and
less than 15 volts under all conditions.
Uses include isolated off-line full bridge and half bridge drives for driv-
ing motors, switches, and any other load requiring full electrical isola-
tion.
The UC1725 is characterized for operation over the full military tem-
perature range of -55°C to +125°C while the UC2725 and UC3725 are
characterized for -25°C to +85°C and 0°C to +70°C respectively.
BLOCK DIAGRAM
1/94
UDG-92051-1

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UC3725 equivalent
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright © 1999, Texas Instruments Incorporated


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Featured Datasheets

Part NumberDescriptionMFRS
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UC3724The function is Isolated Drive Transmitter. Texas InstrumentsTexas Instruments
UC3725The function is Isolated High Side FET Driver. UnitrodeUnitrode

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