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UCC28730-Q1

ACTIVE

Zero-power standby PSR flyback controller for automotive

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Data sheet

UCC28730-Q1

ACTIVE
Data sheet Order now

Product details

Topology Buck, Flyback Control mode Primary-side regulation Features Automotive qualified, Current limiting, DCM, Green mode, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Low power, Overcurrent protection, Overtemperature protection, Primary-side regulated, Quasi-Resonant, Soft start, Thermal shutdown, Valley switching
Topology Buck, Flyback Control mode Primary-side regulation Features Automotive qualified, Current limiting, DCM, Green mode, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Low power, Overcurrent protection, Overtemperature protection, Primary-side regulated, Quasi-Resonant, Soft start, Thermal shutdown, Valley switching
SOIC (D) 7 29.4 mm² 4.9 x 6
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40⁰C to +125⁰C
    • Device HBM Classification Level 2: ±2 kV
    • Device CDM Classification Level C4B: ±750 V
  • Functional Safety-Capable
  • Enables Zero-Power (< 5 mW) Standby Consumption
  • Primary-Side Regulation (PSR) Eliminates Opto-coupler
  • ±5% Voltage Regulation and Current Regulation Across Line and Load
  • 700-V Start-up Switch with 30-V Minimum Start-up Voltage
  • 83-kHz Maximum Switching Frequency Enables Low Stand-by Power Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • Frequency-Dither to Ease EMI Compliance
  • Clamped Gate-Drive Output for MOSFET
  • Over-Voltage, Low-Line, and Over-Current Protection Functions
  • Programmable Cable Compensation
  • SOIC-7 Package
  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40⁰C to +125⁰C
    • Device HBM Classification Level 2: ±2 kV
    • Device CDM Classification Level C4B: ±750 V
  • Functional Safety-Capable
  • Enables Zero-Power (< 5 mW) Standby Consumption
  • Primary-Side Regulation (PSR) Eliminates Opto-coupler
  • ±5% Voltage Regulation and Current Regulation Across Line and Load
  • 700-V Start-up Switch with 30-V Minimum Start-up Voltage
  • 83-kHz Maximum Switching Frequency Enables Low Stand-by Power Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • Frequency-Dither to Ease EMI Compliance
  • Clamped Gate-Drive Output for MOSFET
  • Over-Voltage, Low-Line, and Over-Current Protection Functions
  • Programmable Cable Compensation
  • SOIC-7 Package

The UCC28730-Q1 isolated-flyback power supply controller provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. A minimum switching frequency of 30 Hz achieves 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.

An internal 700-V start-up switch, dynamically- controlled 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-Q1 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.

The UCC28730-Q1 isolated-flyback power supply controller provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. A minimum switching frequency of 30 Hz achieves 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.

An internal 700-V start-up switch, dynamically- controlled 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-Q1 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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UCC28730 ACTIVE Zero standby PSR flyback controller with CVCC and wake-up monitoring This is the non-automotive variant

Technical documentation

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Type Title Date
* Data sheet UCC28730-Q1 Zero-Power Standby PSR Flyback Controller for Automotive datasheet (Rev. B) PDF | HTML 30 Nov 2020
White paper Isolated Bias Power Supply Architecture for HEV and EV Traction Inverters PDF | HTML 11 Oct 2023
Application brief Designing a Robust Traction Inverter Redundant Power Supply From 800 V Battery (Rev. C) PDF | HTML 16 Feb 2023
Functional safety information UCC28730-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 18 Aug 2020
Application note Minimize Standby Consumption for UCC287XX Family 01 Aug 2019
White paper Driving the future of HEV/EV with high-voltage solutions (Rev. B) 16 May 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

UCC28730EVM-552 — UCC28730 Primary Side Flyback Controller with UCC24650 Secondary Side Wake Up

The UCC28730EVM-552 evaluation module is a 10-W off-line discontinuous mode (DCM) flyback converter that provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler.  The primary side controller detects a wake-up signal from the secondary (...)

User guide: PDF
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Simulation model

UCC28730 & UCC24650 PSpice Transient Model

SLUM527.ZIP (103 KB) - PSpice Model
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Calculation tool

SLUC579 — UCC28730 Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC controllers
  • UCC28730 — Zero standby PSR flyback controller with CVCC and wake-up monitoring
  • UCC28730-Q1 — Zero-power standby PSR flyback controller for automotive
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Reference designs

PMP23431 — 60V to 1000V input, triple output 10W PSR flyback reference design

This reference design uses the UCC28730-Q1 flyback controller to produce an isolated 33V output. The design is capable of three 100mA outputs from a 60-V to 1000Vdc input. It is designed to be a bias supply for a traction inverter with an automotive-qualified controller.
Test report: PDF
Reference designs

PMP31248 — 230V AC input 12V primary side regulated flyback reference design

This reference design is a quasi-resonant flyback power supply based on the UCC28730 primary side regulation (PSR) controller and UCC24650 (wake-up monitor). Using PSR topology eliminates the need of an optocoupler, increases reliability and optimizes system cost. This design achieves less than 6 (...)
Test report: PDF
Reference designs

PMP22288 — 15-W flyback reference design for automotive inverter power

This reference design uses the UCC28730-Q1 flyback controller to produce an isolated 15-V output. The design is capable of 0.33 A from 40-V to 250-VDC input and 1 A from 250-V to 550-VDC input. This power reference design is applicable for an inverter bias supply application and is (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP22557 — High voltage buck converter reference design for E-motorcycle BMS applications

This non-isolated buck converter provides a fixed output of 12V at 400mA for BMS applications. It operates over an input voltage range of 50Vdc – 150Vdc after a startup greater than 40V. Operating in discontinuous conduction mode (DCM), this converter utilizes the UCC28730 controller, which (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP22487 — High voltage buck converter reference design for BMS applications

This non-isolated buck converter provides a fixed output of 14 V at 130 mA for BMS applications. It operates over an input voltage range of 18 Vdc – 144 Vdc after a startup greater than 23 V. Operating in discontinuous conduction mode (DCM), this converter utilizes the UCC28730 controller, (...)
Test report: PDF
Schematic: PDF
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SOIC (D) 7 Ultra Librarian
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