UCC28730D Part Information
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.
- 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
|Input Voltage AC Min||85V|
|Input Voltage AC Max||265V|
|AC / DC Converter Case Style||SOIC|
|No. of Pins||7Pins|
|Operating Temperature Min||-40°C|
|Operating Temperature Max||125°C|
|RoHS Phthalates Compliant||Yes|
|MSL||MSL 1 - Unlimited|
|SVHC||No SVHC (27-Jun-2018)|
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.
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Authorised distributors including RS Components and Texas Instruments have stock available or on a lead time for UCC28730D.
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