UCC28730D Part Information

Details for UCC28730D by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part Description

The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, and wake-up signal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. The wake-up monitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance. An internal 700-V start-up switch, dynamicallycontrolled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

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Part Features

  • 700-V Start-up Switch
  • 83-kHz Maximum Switching Frequency Enables Low Stand-by Power Charger Designs
  • Clamped Gate-Drive Output for MOSFET
  • Enables Zero-Power (<5 mW) Standby Consumption
  • Frequency-Dither to Ease EMI Compliance
  • Over-Voltage, Low-Line, and Over-Current Protection Functions
  • Primary-Side Regulation (PSR) Eliminates Opto- coupler
  • Programmable Cable Compensation
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • SOIC-7 Package
  • Smart Wake-Up Detection Enables Smallest Output Capacitance
  • u00b15% Voltage Regulation and Current Regulation Across Line and Load

Part Specifications

Input Voltage AC Min 85V
Input Voltage AC Max 265V
AC / DC Converter Case Style SOIC
No. of Pins 7Pins
Power Rating -
Topology Flyback
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • DC-DC CC/CV Flyback Controller SOIC7 | RS Components
  • Zero standby PSR Flyback controller with CVCC and wake-up monitoring | Texas Instruments

Frequently Asked Questions

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What category does UCC28730D fall under?

The UCC28730D is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

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Is the UCC28730D RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

Which authorised distributors for UCC28730D have stock available?

Authorised distributors including RS Components and Texas Instruments have stock available or on a lead time for UCC28730D.

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