UCC28730-Q1 Texas instruments

UCC28730-Q1

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UCC28730-Q1

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Описание

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.

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
- Documentation available to aid functional safety system design
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

Control mode	Primary-side regulation
UVLO thresholds on/off (V)	21/7
Switching frequency (max) (kHz)	83
Features	Current limiting, DCM, Green mode, High-voltage startup, Input line monitor, Leading edge blanking, Light-load efficiency, Low power, PSR, Soft start, Thermal shutdown, Valley switching
Operating temperature range (°C)	-40 to 125
Rating	Automotive
TI functional safety category	Functional Safety-Capable
Device type	Controllers
Topology	Buck, Flyback