LM5021

AKTIV

Strommodus-PWM-Controller (30 V, 1 MHz)

Jetzt bestellen

Datenblatt

document-pdfAcrobat LM5021 AC-DC Current-Mode PWM Controller datasheet (Rev. E) (Englisch) PDF | HTML

LM5021

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Operating temperature range (°C)

-40 to 125

Control mode

Secondary-side regulation

Topology

Flyback, Forward

Rating

Catalog

Features

CCM, DCM, Frequency synchronization, Leading edge blanking, Secondary-side regulated, Skip cycle mode, Slope compensation

Duty cycle (max) (%)

80

Operating temperature range (°C)

-40 to 125

Control mode

Secondary-side regulation

Topology

Flyback, Forward

Rating

Catalog

Features

CCM, DCM, Frequency synchronization, Leading edge blanking, Secondary-side regulated, Skip cycle mode, Slope compensation

Duty cycle (max) (%)

80

PDIP (P)

8

92.5083 mm² 9.81 x 9.43

VSSOP (DGK)

8

14.7 mm² 3 x 4.9

Ultra Low Start-up Current (25 µA maximum)
Current Mode Control
Skip Cycle Mode for Low Standby Power
Single Resistor Programmable Oscillator
Synchronizable Oscillator
Adjustable Soft-Start
Integrated 0.7 A Peak Gate Driver
Direct Opto-Coupler Interface
Maximum Duty Cycle Limiting (80% for LM5021-1
or 50% for LM5021-2)
Slope Compensation (LM5021-1 Only)
Under Voltage Lockout (UVLO) with Hysteresis
Cycle-by-Cycle Over-Current Protection
Hiccup Mode for Continuous Overload Protection
Leading Edge Blanking of Current Sense Signal
Packages: VSSOP-8 or PDIP-8

Ultra Low Start-up Current (25 µA maximum)
Current Mode Control
Skip Cycle Mode for Low Standby Power
Single Resistor Programmable Oscillator
Synchronizable Oscillator
Adjustable Soft-Start
Integrated 0.7 A Peak Gate Driver
Direct Opto-Coupler Interface
Maximum Duty Cycle Limiting (80% for LM5021-1
or 50% for LM5021-2)
Slope Compensation (LM5021-1 Only)
Under Voltage Lockout (UVLO) with Hysteresis
Cycle-by-Cycle Over-Current Protection
Hiccup Mode for Continuous Overload Protection
Leading Edge Blanking of Current Sense Signal
Packages: VSSOP-8 or PDIP-8

The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.

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Alle anzeigen 6

	Typ	Titel		Datum
*	Data sheet	LM5021 AC-DC Current-Mode PWM Controller datasheet (Rev. E)	PDF \| HTML	24 Dez 2014
	Functional safety information	LM5021 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	12 Sep 2022
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	Technical article	Power Tips: Design considerations of high-voltage converters in a cascode MOSFET	PDF \| HTML	03 Nov 2015
	Application note	AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A)		01 Mai 2013
	User guide	Load Detecting Power Supply User Guide		27 Jan 2012

Design und Entwicklung

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