UCC28740D Semiconductors - ICs by Texas Instruments


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

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Logo for Texas Instruments Texas Instruments US$0.45
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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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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

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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.

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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.

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

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