UCC28740D Semiconductors - ICs by Texas Instruments

IC CV/CC FLYBK CONTROLLER 38V SOIC-7

Status: Unknown
Series: -
RoHS: Unknown
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The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to largeload steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current. An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response. Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges. The controller has a maximum switching frequency of 100 kHz and always maintains control of the peakprimary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW noload power.

Prices starting from US$0.45


Distributor Starting From Stock
Logo for Texas Instruments Texas Instruments US$0.45
67,264
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Logo for Newark Electronics Newark Electronics US$1.24
-
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Logo for element14 element14 US$1.33
-
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Specifications

Input Voltage -
Output Voltage -
Output Current -
Supply Voltage Min 9V
Supply Voltage Max 35V
Controller IC Case Style SOIC
No. of Pins 7Pins
Frequency 100kHz
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)

Alternative Descriptions

Constant-Voltage, Constant-Current (CVCC) Flyback controller with Secondary Side Regulation (SSR) | Texas Instruments
Ic, Cv/Cc Flybk Controller, 38V, Soic-7 | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a UCC28740D?

Additional datasheets, footprints and schematics for UCC28740D are listed on our Part Details page. You can also find images and similar parts to UCC28740D on this page.

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What category does UCC28740D fall under?

The UCC28740D is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

Can I view similar or alternative parts?

You can view similar parts to UCC28740D when available in the Power Management range under the specifications section at the bottom of the details page.

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Is the UCC28740D RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for UCC28740D have stock available?

Authorised distributors including Texas Instruments, Farnell, Newark Electronics and element14 have stock available or on a lead time for UCC28740D.

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