All trademarks are the property of their respective owners.
DescriptionThe 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 minimumswitching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This deviceprocesses information from the primary power switch and an auxiliary flyback winding for precisecontrol of output voltage and current.
An internal 700-V start-up switch, dynamically- controlled operating states and atailored modulation profile support ultra-low stand-by power without sacrificing start-up time oroutput transient response. Control algorithms in the UCC28730-Q1 allow operating efficiencies tomeet or exceed applicable standards. Discontinuous conduction mode (DCM) operation withvalley-switching reduces switching losses. Modulation of the switching frequency and primarycurrent peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load andline ranges.
Feature
- Qualified for Automotive Applications
- AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: -40?C to+125?C
- Device HBM Classification Level 2: ±2kV
- Device CDM Classification Level C4B: ±750 V
- EnablesZero-Power (< 5 mW) Standby Consumption
- Primary-Side Regulation(PSR) Eliminates Opto-coupler
- ±5% Voltage Regulation and Current RegulationAcross Line and Load
- 700-V Start-up Switch
- 83-kHz MaximumSwitching Frequency Enables Low Stand-by Power Charger Designs
- Resonant-RingValley-Switching Operation for Highest Overall Efficiency
- Frequency-Dither toEase EMI Compliance
- Clamped Gate-Drive Output forMOSFET
- Over-Voltage, Low-Line, and Over-Current ProtectionFunctions
- Programmable Cable Compensation
- SOIC-7Package
All trademarks are the property of their respective owners.
DescriptionThe 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 minimumswitching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This deviceprocesses information from the primary power switch and an auxiliary flyback winding for precisecontrol of output voltage and current.
An internal 700-V start-up switch, dynamically- controlled operating states and atailored modulation profile support ultra-low stand-by power without sacrificing start-up time oroutput transient response. Control algorithms in the UCC28730-Q1 allow operating efficiencies tomeet or exceed applicable standards. Discontinuous conduction mode (DCM) operation withvalley-switching reduces switching losses. Modulation of the switching frequency and primarycurrent peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load andline ranges.
