UCC28712

Name: UCC28712
Brand: TI
SKU: UCC28712
Price: 0.556 USD

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Konstantspannungs-, Konstantstrom-PWM mit PSR, Valley-Switching, NTC-Option und 150-mV-Kabel-Komp.

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Datenblatt

document-pdfAcrobat UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. C) (Englisch) PDF | HTML

UCC28712

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Datenblatt

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Produktdetails

Operating temperature range (°C)

-40 to 125

Control mode

Primary-side regulation

Topology

Buck, Flyback

Rating

Catalog

Features

CC/CV output regulation, DCM, Green mode, High voltage startup, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, PSR, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching

Duty cycle (max) (%)

99

Operating temperature range (°C)

-40 to 125

Control mode

Primary-side regulation

Topology

Buck, Flyback

Rating

Catalog

Features

CC/CV output regulation, DCM, Green mode, High voltage startup, High-voltage startup, Input line monitor, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, PSR, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching

Duty cycle (max) (%)

99

SOIC (D)

7

29.4 mm² 4.9 x 6

< 10-mW No-Load Power
Primary-Side Regulation (PSR) Eliminates Opto-Coupler
±5% Voltage and Current Regulation Across Line and Load
700-V Start-Up Switch
100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
Resonant Valley-Switching Operation for Highest Overall Efficiency
Frequency Jitter to Ease EMI Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Overvoltage, Low-Line, and Overcurrent Protection Functions
Programmable Cable Compensation (UCC28710)
NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options
SOIC-7 Package
Create a Custom Design Using the UCC28710 With the WEBENCH^® Power Designer

< 10-mW No-Load Power
Primary-Side Regulation (PSR) Eliminates Opto-Coupler
±5% Voltage and Current Regulation Across Line and Load
700-V Start-Up Switch
100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
Resonant Valley-Switching Operation for Highest Overall Efficiency
Frequency Jitter to Ease EMI Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Overvoltage, Low-Line, and Overcurrent Protection Functions
Programmable Cable Compensation (UCC28710)
NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options
SOIC-7 Package
Create a Custom Design Using the UCC28710 With the WEBENCH^® Power Designer

The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process 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 standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.

The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process 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 standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.

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Technische Dokumentation

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Alle anzeigen 6

	Typ	Titel		Datum
*	Data sheet	UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. C)	PDF \| HTML	30 Jun 2017
	Application note	Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips	PDF \| HTML	31 Aug 2021
	Application note	Minimize Standby Consumption for UCC287XX Family		01 Aug 2019
	White paper	Control Challenges for Low Power AC/DC Converters		02 Okt 2015
	White paper	Control Challenges for Low Power AC/DC Converters (PPT)		02 Okt 2015
	More literature	Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter		29 Okt 2013

Design und Entwicklung

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